Full-text of the article is available for this locale: Russian.
Abstract
INTRODUCTION: Difficult airways is a term that unites all clinical situations when, due to various combinations of anatomical and/or functional changes in patients and/or irrational actions of a specialist, predictable and unpredictable difficulties arise in ensuring effective ventilation, performing laryngoscopy and tracheal intubation, cricothyrotomy or a combination thereof, creating a potential or immediate threat of developing critical gas exchange disorders. OBJECTIVE OF THE STUDY: To create structured guidelines for difficult airways in adults in hospital. MATERIALS AND METHODS: Structured clinical guidelines for difficult airway management in adults in hospital are presented. RESULTS: The article presents the methodological recommendations of the Federation of Anesthesiologists and Resuscitators, revised in 2025. The recommendations are based on modern international guidelines, the results of randomized clinical trials, and meta-analyses.The recommendations present current definitions of various difficult airway situations; modern data on epidemiology, prognostic value of clinical signs, results of instrumental studies. Modern evidence-based data on the effectiveness of modern devices for ventilation and tracheal intubation (supraglottic airways, video laryngoscopes, flexible intubation endoscopes) are presented.Algorithms for actions in various situations with predictable and unpredictable difficult airways in patients with varying risks of aspiration are proposed. The algorithm of actions of an anesthesiologist in the absence of a capnogram after tracheal intubation is separately considered. An algorithm for preparation, prediction of possible complications and performance of tracheal extubation is also proposed. CONCLUSIONS: The recommendations presented in the review are aimed at achieving the goal of increasing patient safety during the occurrence of difficult airway situations by using the safest and most effective approaches and methods, as well as reducing the risk of complications associated with these situations (fatal outcome, severe neurological deficit, traumatic injuries of the upper airways and trachea, etc.).
References
- Keskin M., Jackson I.T. Airway management in craniofacial anomalies. Eur J Plast Surg 28, 253–258 (2005). DOI: 10.1007/s00238-005-0748-9
- Yang J., Trivedi A., Alvarez Z., et al. Predicting difficult airway intubation based on Maxillofacial trauma: a retrospective study. Cureus. 2022; 14(5): e24844.
- Liu Y., Wang J., Zhong S. Correlation between clinical risk factors and tracheal intubation difficulty in infants with Pierre-Robin syndrome: a retrospective study. BMC Anesthesiol. 2020; 8; 20(1): 82. DOI: 10.1186/s12871-020-00997-w
- Greenland K.B. Airway assessment based on a three column model of direct laryngoscopy. Anaesth Intensive Care. 2010; 38(1): 14–9. DOI: 10.1177/0310057X1003800104
- Mason A.M., Rich J. Airway anatomy and assessment. In: Rich J., editor. SLAM: Street Level Airway Management. Upper Saddle River, NJ: Brady/Pearson Prentice Hall; 2007. pp. 19–36
- Fonseca D., Graça M.I., Salgueirinho C., et al. Physiologically difficult airway: How to approach the difficulty beyond anatomy. Trends in Anaesthesia and Critical Care, Volume 48, 2023, 101212, ISSN 2210-8440. DOI: 10.1016/j.tacc.2023.101212
- Myatra S.N., Divatia J.V., Brewster D.J. The physiologically difficult airway: an emerging concept. Curr Opin Anaesthesiol. 2022, 1; 35(2):115–21. DOI: 10.1097/ACO.0000000000001102
- Cheney F.W., Posner K.L., Lee L.A., et al. Trends in anesthesia-related death and brain damage: A closed claims analysis. Anesthesiology. 2006; 105(6): 1081–6. DOI: 10.1097/00000542-200612000-00007
- Metzner J., Posner K.L., Lam M.S. et al. Closed claims' analysis. Best Pract Res Clin Anaesthesiol. 2011; 25(2): 263–76. DOI: 10.1016/j.bpa.2011.02.007
- Joffe A.M., Aziz M.F., Posner K.L., et al. Management of Difficult Tracheal Intubation: A Closed Claims Analysis. Anesthesiology. 2019;131(4):818–829. DOI: 10.1097/ALN.0000000000002815
- Kheterpal S., Han R., Tremper K.K,. et al. Incidence and predictors of difficult and impossible mask ventilation. Anesthesiology. 2006;105(5):885-891. DOI: 10.1097/00000542-200611000-00007
- Kheterpal S., Martin L., Shanks A.M., et al. Prediction and outcomes of impossible mask ventilation: a review of 50,000 anesthetics. Anesthesiology. 2009;110(4):891-897. DOI: 10.1097/ALN.0b013e31819b5b87
- Samsoon G.L., Young J.R. Difficult tracheal intubation: a retrospective study. Anaesthesia. 1987;42:487–490. DOI: 10.1111/j.1365-2044.1987.tb04039.x
- Tachibana N., Yukitoshi N., Michiaki Y. Incidence of cannot ntubate–cannot ventilate (CICV): results of a 3-year retrospective multicenter clinical study in a network of university hospitals. J Anesth. 2015;29:326–330. DOI: 10.1007/s00540-014-1847-1
- Martin L.D., Mhyre J.M., Shanks A.M., et al. 3,423 emergency tracheal intubations at a university hospital: airway outcomes and complications. Anesthesiology. 2011;114(1):42–48. DOI: 10.1097/ALN.0b013e318201c415
- El Ganzouri A.R., McCarthy R.J., Tuman K.J., et al. Preoperative airway assessment: predictive value of a multivariate risk index. Anesth Analg. 1996;82(6):1197-1204. DOI: 10.1097/00000539-199606000-00017
- Crosby, E.T., Duggan, L.V., Finestone, P.J. et al. Anesthesiology airway-related medicolegal cases from the Canadian Medical Protection Association. Can J Anesth/J Can Anesth 68, 183–195 (2021), DOI: 10.1007/s12630-020-01846-7.
- Cook T.M., Woodall N., Frerk C. Fourth National Audit Project. Major complications of airway management in the UK: results of the Fourth National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society. Part 1: anaesthesia. Br J Anaesth. 2011;106(5):617-631. DOI: 10.1093/bja/aer058
- Cook T.M., Oglesby F., Kane A.D., et al. Airway and respiratory complications during anaesthesia and associated with perioperative cardiac arrest as reported to the 7th National Audit Project of the Royal College of Anaesthetists. Anaesthesia. 2024; 79(4): 368–79. DOI: 10.1111/anae.16187
- Андреенко А.А., Братищев И.В., Долбнева Е.Л., и соавт. Обеспечение проходимости верхних дыхательных путей (обзор существующей практики в РФ на 2020 год). Результаты многоцентрового исследования. Вестник интенсивной терапии им. А.И. Са лтанова. 2021; 1: 107–15. [Andreenko A.A., Bratishchev I.V., Dolbneva E.L., et al. Airway management (review of existing practice in the Russian Federation for 2020). Results of a multicenter study. Annals of Critical Care. 2021; 1: 107–15. (In Russ)]. DOI: 10.21320/1818-474X-2021-1-107-115
- Flin R., Fioratou E., Frerk C., et al. Human factors in the development of complications of airway management: preliminary evaluation of an interview tool. Anaesthesia. 2013; 68: 817–25. DOI: 10.1111/anae.12253
- Edelman D.A., Duggan L.V., Lockhart S.L., et al. Prevalence and commonality of non-technical skills and human factors in airway management guidelines: a narrative review of the last 5 years. Anaesthesia. 2022; 77(10): 1129–36. DOI: 10.1111/anae.15813
- Ellard L., Wong D.T. Preoperative Airway Evaluation. Current Anesthesiology Reports, 10, 19–27 (2020). DOI: 10.1007/s40140-020-00366-w
- Lundstrom L.H., Moller A.M., Rosenstock C., et al. A documented previous difficult tracheal intubation as a prognostic test for a subsequent difficult tracheal intubation in adults. Anaesthesia. 2009; 64(10): 1081–8. DOI: 10.1111/j.1365-2044.2009.06057.x
- Sajayan A., Nair A., Mc Narry A.F., et al. Analysis of a national difficult airway database. Anaesthesia. 2022; 77(10): 1081–8. DOI: 10.1111/anae.15820
- Diemunsch P., Mion G., Bauer C., et al. Quels sont les critères anamnestiques, cliniques et paracliniques d'intubation et/ou de ventilation au masque difficile? [What are the anamnestic, clinical and paraclinical criteria for intubation and/or difficult mask ventilation?]. Ann Fr Anesth Reanim. 2003; 22 Suppl 1: 18s–27s. French. DOI: 10.1016/s0750-7658(03)00301-0
- Zarogoulidis P., Kontakiotis T., Tsakiridis K., et al. Difficult airway and difficult intubation in postintubation tracheal stenosis: a case report and literature review. Ther Clin Risk Manag. 2012; 8: 279–86. DOI: 10.2147/TCRM.S31684
- Ghiani A., Tsitouras K., Paderewska J. et al. Tracheal stenosis in prolonged mechanically ventilated patients: prevalence, risk factors, and bronchoscopic management. BMC Pulm Med. 2022; 22(1): 24. DOI: 10.1186/s12890-022-01821-6
- Mamadou Diawo Bah, Diop/Ndoye M, Outsouta G.N., et al. (2023). Post-Intubation Tracheal Stenosis: Multicenter Study from 2010 to 2022. EAS J Anesthesiol Crit Care, 5(4), 63–9.
- Lundstrøm L.H., Rosenstock C.V., Wetterslev J., et al. The DIFFMASK score for predicting difficult facemask ventilation: a cohort study of 46,804 patients. Anaesthesia. 2019; 74(10): 1267–76. DOI: 10.1111/anae.14701
- Hung K.C., Chuang M.H., Kang F.C., et al. Prevalence and risk factors of difficult mask ventilation: A systematic review and meta-analysis. J Clin Anesth. 2023; 90: 111197. DOI: 10.1016/j.jclinane.2023.111197
- Nagappa M., Wong D.T., Cozowicz C., et al. Is obstructive sleep apnea associated with difficult airway? Evidence from a systematic review and meta-analysis of prospective and retrospective cohort studies. PLoS One. 2018; 4; 13(10): e0204904. DOI: 10.1371/journal.pone.0204904
- Leong S.M., Tiwari A., Chung F., et al. Obstructive sleep apnea as a risk factor associated with difficult airway management - A narrative review. J Clin Anesth. 2018; 45: 63–8. DOI: 10.1016/j.jclinane.2017.12.024
- Chung F., Yegneswaran B., Liao P., et al. STOP questionnaire: a tool to screen patients for obstructive sleep apnea. Anesthesiology. 2008; 108(5): 812–21. DOI: 10.1097/ALN.0b013e31816d83e4
- Saito T., Liu W., Chew S.T., et al. Incidence of and risk factors for difficult ventilation via a supraglottic airway device in a population of 14,480 patients from South-East Asia. Anaesthesia. 2015; 70(9): 1079–83. DOI: 10.1111/anae.13153
- DI Filippo A., Adembri C., Paparella L., et al. Airway Management Study Group of SIAARTI. Risk factors for difficult Laryngeal Mask Airway LMA-Supreme™ (LMAS) placement in adults: a multicentric prospective observational study in an Italian population. Minerva Anestesiol. 2021; 87(5): 533–40. DOI: 10.23736/S0375-9393.20.15001-6
- Kheterpal S., Healy D., Aziz M.F., et al. Incidence, predictors, and outcome of difficult mask ventilation combined with difficult laryngoscopy: a report from the multicenter perioperative outcomes group. Anesthesiology. 2013; 119(6): 1360–9. DOI: 10.1097/ALN.0000435832.39353.20
- Roth D., Pace N.L., Lee A., et al. Airway physical examination tests for detection of difficult airway management in apparently normal adult patients. Cochrane Database Syst Rev. 2018; 15; 5:CD008874. DOI: 10.1002/14651858.CD008874.pub2
- Khan Z.H., Mohammadi M., Rasouli M.R., et al. The diagnostic value of the upper lip bite test combined with sternomental distance, thyromental distance, and interincisor distance for prediction of easy laryngoscopy and intubation: a prospective study. Anesth Analg. 2009; 109(3): 822–4. DOI: 10.1213/ane.0b013e3181af7f0d
- Faramarzi E., Soleimanpour H., Khan Z.H., et al. Upper lip bite test for prediction of difficult airway: A systematic review. Pak J Med Sci. 2018; 34(4): 101923. DOI: 10.12669/pjms.344.15364
- Tremblay M.H., Williams S., Robitaille A., et al. Poor visualization during direct laryngoscopy and high upper lip bite test score are predictors of difficult intubation with the GlideScope1 videolaryngoscope. Anesth Analg. 2008;106(5):1495-1500. DOI: 10.1213/ane.0b013e318168b38f
- Roth D., Pace N.L., Lee A., et al. Bedside tests for predicting difficult airways: an abridged Cochrane diagnostic test accuracy systematic review. Anaesthesia. 2019; 74(7): 915–28. DOI: 10.1111/anae.14608
- Bhure A., Ankush A., Deshmukh P.P., et al. Comparative study of airway assessment tests to predict difficult laryngoscopy & intubation. Indian J Clin Anaesth 2019; 6(2): 172–9.
- Bansal S., Rathee S., Antil P. K., et al. Assessment of difficult airway by using various bedside screening tests for endotracheal intubation. Indian J Clin Anaesth 2019; 6(2): 270–3. DOI: 10.18231/j.ijca.2019.050
- Mallhi A.I., Abbas N., Naqvi S.M.N., et al. A comparison of Mallampati classification, thyromental distance and a combination of both to predict difficult intubation. Anaesth Pain & Intensive Care 2018; 22(4): 468–73.
- Kheirabadi D., Honarmand A., Rasouli M.R., et al. Comparison of airway assessment tests for prediction of difficult intubation in obese patients: importance of thyromental height and upper lip bite test. Minerva Anestesiol. 2022; 88(3): 114–20. DOI: 10.23736/S0375-9393.21.15764-5
- Wilson M.E., Spiegelhalter D., Robertson J.A., et al. Predicting difficult intubation. Br J Anaesth. 1988; 61(2): 211–6. DOI: 10.1093/bja/61.2.211
- L'Hermite J., Nouvellon E., Cuvillon P., et al. The Simplified Predictive Intubation Difficulty Score: a new weighted score for difficult airway assessment. Eur J Anaesthesiol. 2009; 26(12): 1003–9. DOI: 10.1097/EJA.0b013e32832efc71
- Reed M.J., Rennie L.M., Dunn M.J., et al. Is the 'LEMON' method an easily applied emergency airway assessment tool? European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine. 2004; 11(3): 154–7. DOI: 10.1097/01.mej.0000127645.46457.b9
- Arne J., et al. Preoperative assessment for difficult intubation in general and ENT surgery: predictive value of a clinical multivariate risk index. Br J Anaesth. 1998; 80(2): 140–6. DOI: 10.1093/bja/80.2.140
- Nørskov A. K., Wetterslev J., Rosenstock C.V., et al. Effects of using the simplified airway risk index vs usual airway assessment on unanticipated difficult tracheal intubation - a cluster randomized trial with 64,273 participants. Br J Anaesth. 2016; 116(5): 680–9. DOI: 10.1093/bja/aew057
- Huitink J.M. Airway triage: A novel application-based method for airway assessment and risk stratification. Br J Anaesth. 2024; 132: 987–90. DOI: 10.1016/j.bja.2024.02.020
- Nørskov A.K., Rosenstock C.V., Wetterslev J., et al. Diagnostic accuracy of anaesthesiologists’ prediction of difficult airway management in daily clinical practice: a cohort study of 188 064 patients registered in the Danish Anaesthesia Database. Anaesthesia. 2015; 70(3): 272–81. DOI: 10.1111/anae.12955
- Lim K.S., Nielsen J.R. Objective description of mask ventilation. Br J Anaesth. 2016; 117(6): 828–9. DOI: 10.1093/bja/aew368
- Nielsen J.R., Lim K.S. Increasing the Scope on Difficult Airways: What About Mask Ventilation? Anesth Analg. 2019; 129(3): e109. DOI: 10.1213/ANE.0000000000004285
- Baker P. Mask ventilation. F1000Res. 2018; 23; 7: F1000. Faculty Rev-1683. DOI: 10.12688/f1000research.15742.1
- Nielsen J.R., Lim K.S. Testing mask ventilation: It's capnography that counts. Acta Anaesthesiol Scand. 2020; 64(3): 419. DOI: 10.1111/aas.13530
- Brimacombe J.R. Laryngeal Mask Anesthesia – Principles and Practice, 2nd Edn. Philadelphia, PA, USA: Saunders, 2005.
- O'Connor C.J., Jr, Borromeo C.J., Stix M.S. Assessing ProSeal laryngeal mask positioning: the suprasternal notch test. Anesth Analg. 2002; 94: 1374–5. DOI: 10.1097/00000539-200205000-00082
- O'Connor C.J., Jr, Davies S.R., Stix M.S. “Soap bubbles” and “gauze thread” drain tube tests. Anesth Analg. 2001; 93: 1082. DOI: 10.1097/00000539-200110000-00067
- Moser B., Keller C., Audigé L., et al. Oropharyngeal leak pressure of the LMA Protector™ vs the LMA Supreme™; a prospective, randomized, controlled clinical trial. Acta Anaesthesiol Scand. 2019 Mar; 63(3): 322–8. DOI: 10.1111/aas.13256
- Cook T.M. A new practical classification of laryngeal view. Anaesthesia. 2000; 55(3): 274–9. DOI: 10.1046/j.1365-2044.2000.01270.x
- Swann A.D., English J.D., O'Loughlin E.J. The development and preliminary evaluation of a proposed new scoring system for videolaryngoscopy. Anaesth Intensive Care. 2012; 40(4): 697–701. DOI: 10.1177/0310057X1204000417
- Kohse E.K., Siebert H.K., Sasu P.B., et al. A model to predict difficult airway alerts after videolaryngoscopy in adults with anticipated difficult airways — the VIDIAC score. Anaesthesia. 2022; 77(10): 1089–96. DOI: 10.1111/anae.15841
- Adnet F., Borron S.W., Racine S.X., et al. The Intubation Difficulty Scale (IDS): Proposal and Evaluation of a New Score Characterizing the Complexity of Endotracheal Intubation. Anesthesiology 1997; 87: 1290–97. DOI: 10.1097/00000542-199712000-00005
- Guo Y., Feng Y., Liang H., et al. Role of flexible fiberoptic laryngoscopy in predicting difficult intubation. Minerva Anestesiologica 2018; 84(3): 337–45. DOI: 10.23736/S0375-9393.17.12144-9
- Rosenblatt W., Ianus A.I., Sukhupragarn W., et al. Preoperative endoscopic airway examination (PEAE) provides superior airway information and may reduce the use of unnecessary awake intubation. Anesth Analg. 2011; 112(3): 602–7. DOI: 10.1213/ANE.0b013e3181fdfc1c
- Kanaya N., Kawana S., Watanabe H., et al. The utility of three-dimensional computed tomography in unanticipated difficult endotracheal intubation. Anesth Analg. 2000; 91(3): 752–4. DOI: 10.1097/00000539-200009000-00048
- You-Ten K.E., Siddiqui N., Teoh W.H. et al. Point-of-care ultrasound (POCUS) of the upper airway. Can J Anaesth. 2018; 65(4) :473–84. DOI: 10.1007/s12630-018-1064-8
- Chen H., Zheng Y., Fu Q., et al. A review of the current status and progress in difficult airway assessment research. Eur J Med Res. 2024;29(1):172. DOI: 10.1186/s40001-024-01759-x
- Marchis I.F., Negrut M.F., Blebea C.M., et al. Trends in Preoperative Airway Assessment. Diagnostics (Basel). 2024; 14(6): 610. DOI: 10.3390/diagnostics14060610
- O'Carroll J., Endlich Y., Ahmad I. Advanced airway assessment techniques. BJA Educ. 2021; 21(9): 336–42. DOI: 10.1016/j.bjae.2021.04.004
- Xia M., Ma W., Zuo M., et al. Expert consensus on difficult airway assessment. Hepatobiliary Surg Nutr. 2023; 12(4): 545–66. DOI: 10.21037/hbsn-23-46
- Kajekar P., Mendonca C., Gaur V. Role of ultrasound in airway assessment and management. Interv J Ultrasound Appl Technol Perioper Care 2010; 1: 97–100. DOI: 10.5005/jp-journals-10014-1015
- Zhang J., Teoh W.H. & Kristensen M.S. Ultrasound in Airway Management. Curr Anesthesiol Rep 10, 317–26 (2020). DOI: 10.1007/s40140-020-00412-7
- Zetlaoui P.J. Ultrasonography for airway management. Anaesth Crit Care Pain Med. 2021; 40(2): 100821. DOI: 10.1016/j.accpm.2021.100821
- Prasad A., Yu E., Wong D.T., et al. Comparison of sonography and computed tomography as imaging tools for assessment of airway structures. J Ultrasound Med. 2011; 30(7): 965–72. DOI: 10.7863/jum.2011.30.7.965
- Lakhal K., Delplace X., Cottier J.P., et al. The feasibility of ultrasound to assess subglottic diameter. Anesth Analg 2007; 104: 611–4.
- Bhagavan S., Nelamangala K. Accuracy of Preoperative Ultrasonographic Airway Assessment in Predicting Difficult Laryngoscopies in Adult Patients. Cureus. 2023; 1; 15(3): e35652. DOI: 10.7759/cureus.35652
- Carsetti A., Sorbello M., Adrario E., et al. Airway ultrasound as predictor of difficult direct laryngoscopy: A systematic review and meta-analysis. Anesth Analg. 2022; 134(4): 740–50. DOI: 10.1213/ANE.0000000000005839
- Wu H., Wang H. Diagnostic Efficacy and Clinical Value of Ultrasonography in Difficult Airway Assessment: Based on a Prospective Cohort Study. Contrast Media Mol Imaging. 2022; 24: 4706438. DOI: 10.1155/2022/4706438
- Усикян Э.Г., Зайцев А.Ю., Дубровин К.В., и соавт. Ультразвуковые предикторы трудных дыхательных путей. Вестник анестезиологии и реаниматологии. 2023; 20(5): 33–9. [Usikyan E. G., Zaycev A. Yu., Dubrovin K. V., et al. Ultrasound predictors of difficult airways. Messenger of Anesthesiology and Resuscitation, 2023; 20(5): 33–9. (In Russ)]. DOI: 10.24884/2078-5658-2023-20-5-33-39
- Udayakumar G.S., Priya L., Narayanan V. Comparison of Ultrasound Parameters and Clinical Parameters in Airway Assessment for Prediction of Difficult Laryngoscopy and Intubation: An Observational Study. Cureus. 2023; 5; 15(7): e41392. DOI: 10.7759/cureus.41392
- Yao W, Wang B. Can tongue thickness measured by ultrasonography predict difficult tracheal intubation? Br J Anaesth. 2017; 118(4): 601–9. DOI: 10.1093/bja/aex051
- Bektas F., Soyuncu S., Yigit O., et al. Sonographic diagnosis of epiglottal enlargement. Emerg Med J. 2010; 27(3): 224–5. DOI: 10.1136/emj.2009.076091
- Kristensen M.S., Teoh W.H., Graumann O., Laursen C.B. Ultrasonography for clinical decision-making and intervention in airway management: From the mouth to the lungs and pleurae. Insights Imaging. 2014; 5(2): 253–79. DOI: 10.1007/s13244-014-0309-5
- Gupta K., Gupta P.K., Rastogi B., et al. Assessment of the subglottic region by ultrasonography for estimation of appropriate size endotracheal tube: A clinical prospective study. Anesth Essays Res. 2012; 6(2): 157–60. DOI: 10.4103/0259-1162.108298
- Kristensen M.S., Teoh W.H., Rudolph S.S. Ultrasonographic identification of the cricothyroid membrane: best evidence, techniques, and clinical impact. Br J Anaesth. 2016; 117 Suppl 1: i39–i48. DOI: 10.1093/bja/aew176
- Bhargava V., Rockwell N.A., Tawfik D., et al. Prediction of difficult laryngoscopy using ultrasound: A systematic review and meta-analysis. Crit Care Med. 2023; 51(1): 117–26. DOI: 10.1097/CCM.0000000000005711
- Giordano G., Alessandri F., Zulian A., et al. Pre-operative ultrasound prediction of difficult airway management in adult patients: A systematic review of clinical evidence. Eur J Anaesthesiol. 2023;40(5):313-325. DOI: 10.1097/EJA.0000000000001805
- De Luis-Cabezón N., Ly-Liu D., Renedo-Corcostegui P., et al. A new score for airway assessment using clinical and ultrasound parameters. Front Med (Lausanne). 2024; 11: 1334595. DOI: 10.3389/fmed.2024.1334595
- Xu J., Wang B., Wang M., et al. The value of multiparameter combinations for predicting difficult airways by ultrasound. BMC Anesthesiol. 2022; 22(1): 311. DOI: 10.1186/s12871-022-01840-0
- Landreau B., Odin I., Nathan N. Pulmonary aspiration: epidemiology and risk factors. Ann Fr Anesth Reanim. 2009; 28: 206–10. DOI: 10.1016/j.annfar.2009.01.020
- Garg H., Podder S., Bala I., Gulati A. Comparison of fasting gastric volume using ultrasound in diabetic and non-diabetic patients in elective surgery: An observational study. Indian J Anaesth. 2020; 64(5): 391–96. DOI: 10.4103/ija.IJA_796_19
- Sharma G., Jacob R., Mahankali S., et al. Preoperative assessment of gastric contents and volume using bedside ultrasound in adult patients: A prospective, observational, correlation study. Indian J Anaesth. 2018; 62(10): 753–58. DOI: 10.4103/ija.IJA_147_18
- Gültekin Y., Kılıç Ö., Özçelik Z., et al. Can Gastric Volume be Accurately Estimated by Ultrasound? Turk J Anaesthesiol Reanim. 2022; 50(3): 194–200. DOI: 10.5152/TJAR.2022.21341
- Perlas A., Mitsakakis N., Liu L., et al. Validation of a mathematical model for ultrasound assessment of gastric volume by gastroscopic examination. Anesth Analg. 2013; 116(2): 357–63. DOI: 10.1213/ANE.0b013e318274fc19
- Alakkad H., Kruisselbrink R., Chin K.J. et al. Point-of-care ultrasound defines gastric content and changes the anesthetic management of elective surgical patients who have not followed fasting instructions: a prospective case series. Can J Anaesth. 2015; 62(11): 1188–95. DOI: 10.1007/s12630-015-0449-1
- Zhang G., Huang X., Shui Y., et al. Ultrasound to guide the individual medical decision by evaluating the gastric contents and risk of aspiration: A literature review. Asian J Surg. 2020; 43(12): 1142–48. DOI: 10.1016/j.asjsur.2020.02.008
- Baettig S.J., Filipovic M.G., Hebeisen M., et al. Pre-operative gastric ultrasound in patients at risk of pulmonary aspiration: a prospective observational cohort study. Anaesthesia. 2023; 78(11): 1327–37. DOI: 10.1111/anae.16117
- Srinivasareddy S. Gastric Ultrasound for Gastric Content Evaluation. Turk J Anaesthesiol Reanim. 2023; 51(6): 465–9. DOI: 10.4274/TJAR.2023.231479
- El-Boghdadly K., Dhesi J., Fabb P., et al. Elective peri-operative management of adults taking glucagon-like peptide-1 receptor agonists, glucose-dependent insulinotropic peptide agonists and sodium-glucose cotransporter-2 inhibitors: a multidisciplinary consensus statement: A consensus statement from the Association of Anaesthetists, Association of British Clinical Diabetologists, British Obesity and Metabolic Surgery Society, Centre for Perioperative Care, Joint British Diabetes Societies for Inpatient Care, Royal College of Anaesthetists, Society for Obesity and Bariatric Anaesthesia and UK Clinical Pharmacy Association. Anaesthesia. 2025; 80(4): 412–24. DOI: 10.1111/anae.16541
- Sherwin M., Hamburger J., Katz D., et al. Influence of semaglutide use on the presence of residual gastric solids on gastric ultrasound: a prospective observational study in volunteers without obesity recently started on semaglutide. Can J Anaesth. 2023; 70(8): 1300–06. English. DOI: 10.1007/s12630-023-02549-5
- Chang M.G., Ripoll J.G., Lopez E., et al. A Scoping Review of GLP-1 Receptor Agonists: Are They Associated with Increased Gastric Contents, Regurgitation, and Aspiration Events? J Clin Med. 2024; 13(21): 6336. DOI: 10.3390/jcm13216336
- Ji C., Ni Q., Chen W. Diagnostic accuracy of radiology (CT, X-ray, US) for predicting difficult intubation in adults: a meta-analysis. J Clin Anesth. 2018; 45: 79–87. DOI: 10.1016/j.jclinane.2017.12.023
- Han Y.Z., Tian Y., Zhang H., et al. Radiologic indicators for prediction of difficult laryngoscopy in patients with cervical spondylosis. Acta Anaesthesiol Scand. 2018; 62(4): 474–82. DOI: 10.1111/aas.13078
- Ji C., Ni Q., Chen W. Diagnostic accuracy of radiology (CT, X-ray, US) for predicting difficult intubation in adults: A meta-analysis. J ClinAnesth. 2018; 45: 79–87. DOI: 10.1016/j.jclinane.2017.12.023
- Gutiérrez J.C., Merino S., De la Calle P., et al. Correlation of Preoperative Findings in the Computerized Axial Tomography with the Presence of Via Difficult Airway in Patients Operated Through Otorhinolaryngological Surgery of the Head and Neck. Rev Esp Anestesiol Reanim. 2018; 65(5): 252–57. DOI: 10.1016/j.redar.2018.01.013
- Gemma M., Buratti L., Di Santo D., et al. Pre-operative transnasal endoscopy as a predictor of difficult airway: A prospective cohort study. Eur J Anaesthesiol. 2020; 37(2): 98–104. DOI: 10.1097/EJA.0000000000001127
- Gaszynski T. A comparison of pre-operative transnasal flexible endoscopic laryngoscopy and actual laryngeal view obtained with videolaryngoscopy in predicted difficult intubations. Eur J Anaesthesiol. 2021; 38(2) :201–2. DOI: 10.1097/EJA.0000000000001255
- Rochlin D.H., Moshrefi S., Sheckter C., et al. Preventing Unnecessary Intubations: A 5-Year Regional Burn Center Experience Using Flexible Fiberoptic Laryngoscopy for Airway Evaluation in Patients With Suspected Inhalation or Airway Injury. J Burn Care Res. 2019; 40(3): 341–6. DOI: 10.1093/jbcr/irz016
- Rosenblatt W., Ianus A., Sukhupragarn W., et al. Preoperative Endoscopic Airway Examination (PEAE) provides superior airway information and reduces the use of unnecessary awake intubation. Anesth Analg. 2011; 112(3): 602–7. DOI: 10.1213/ANE.0b013e3181fdfc1c
- Tasli H., Karaman N.E., Isler D., Subasi B. A predictor of difficult airway: the Tasli classification in transnasal flexible laryngoscopy. J Voice. 2021 DOI: 10.1016/j.jvoice.2021.06.022
- Barclay-Steuart A., Großhennig H.L., Sasu P., et al. Transnasal Videoendoscopy for Preoperative Airway Risk Stratification: Development and Validation of a Multivariable Risk Prediction Model. Anesth Analg. 2023; 136(6): 1164–73. DOI: 10.1213/ANE.0000000000006418
- Sasu P.B., Pansa J.I., Stadlhofer R., et al. Nasendoscopy to Predict Difficult Videolaryngoscopy: A Multivariable Model Development Study. J Clin Med. 2023; 12(10): 3433. DOI: 10.3390/jcm12103433.
- Зайцев А.Ю., Сорокин А.Б., Зайцев Ю.А., и др. Искусственный интеллект в диагностике трудных дыхательных путей у взрослых: обзор литературы. Вестник интенсивной терапии им. А.И. Са лтанова. 2025; 1: 110–22. [Zaitsev A.Yu., Sorokin A.B., Zaytsev Yu.A., et al. Artificial intelligence for difficult airways diagnosis in adults: a narrative review. Annals of Critical Care. 2025; 1: 110–22 (In Russ)]. DOI: 10.21320/1818-474X-2025-1-110-122
- García-García F., Lee D.J., Mendoza-Garcés F.J., et al. Reliable prediction of difficult airway for tracheal intubation from patient preoperative photo graphs by machine learning methods. Comput Methods Programs Biomed. 2024; 248: 108–18. DOI: 10.1016/j.cmpb.2024.108118
- De Young P.N., Bakker J.P., Sands S.A., et al. Acoustic pharyngometry measurement of minimal cross-sectional airway area is a significant independent predictor of moderate-to-severe obstructive sleep apnea. J Clin Sleep Med 2013; 9(11): 1161–64.
- Weingart S.D., Levitan R.M. Preoxygenation and prevention of desaturation during emergency airway management. Ann Emerg Med. 2012; 59(3): 165–75.e1. DOI: 10.1016/j.annemergmed.2011.10.002
- Tanoubi I., Drolet P., Donati F. Optimizing preoxygenation in adults. Can J Anaesth. 2009; 56(6): 449–66. DOI: 10.1007/s12630-009-9084-z
- Nimmagadda U., Salem M.R., Crystal G.J. Preoxygenation: Physiologic Basis, Benefits, and Potential Risks. Anesth Analg. 2017; 124(2): 507–17. DOI: 10.1213/ANE.0000000000001589
- Pandey M., Ursekar R., Aphale S. Three minute tidal breathing — a gold standard techniques for pre-oxygenation for elective surgeries. Innov J Med Health Sci. 2014; 4: 194–7.
- Gambee A.M., Hertzka R.E., Fisher D.M. Preoxygenation techniques: Comparison of three minutes and four breaths. Anesth Analg 1987; 66(5): 468–70.
- Baraka A.S., Taha S.K., Aouad M.T., et al. Preoxygenation: comparison of maximal breathing and tidal volume breathing techniques. Anesthesiology. 1999; 91(3) :612–16. DOI: 10.1097/00000542-199909000-00009
- McCrory J.W., Matthews J.N. Comparison of four methods of preoxygenation. Br J Anaesth. 1990, 64: 571–6. DOI: 10.1093/bja/64.5.571
- Rajan S., Mhan P., Paul J., Cherian A. Comparison of margin of safety following two different techniques of preoxygenation. J Anaesthesiol Clin Pharmacol. 2015; 31(2) :165–8. DOI: 10.4103/0970-9185.155142
- Mathew G., Manjuladevi M., Joachim N., et al. Effect of high fresh gas flow and pattern of breathing on rapid preoxygenation. Indian J Anaesth. 2022; 66(3): 213–19. DOI: 10.4103/ija.ija_340_21
- Sirian R., Wills J. Physiology of apnoea and the benefits of preoxygenation. Continuing Education in Anaesthesia, Critical Care & Pain. 2009; 9: 105–8.
- Campbell I.T., Beatty P.C. Monitoring preoxygenation. Br J Anaesth. 1994; 72(1): 3–4. DOI: 10.1093/bja/72.1.3
- Chen S.T., Min S. Oxygen reserve index, a new method of monitoring oxygenation status: what do we need to know? Chin Med J (Engl). 2020; 133(2): 229–34. DOI: 10.1097/CM9.0000000000000625
- McGowan P., Skinner A. Preoxygenation — the importance of a good face mask seal. Br J Anaesth. 1995; 75(6): 777–8. DOI: 10.1093/bja/75.6.777
- Dixon B.J., Dixon J.B., Carden J.R., et al. Preoxygenation is more effective in the 25 degrees head-up position than in the supine position in severely obese patients: a randomized controlled study. Anesthesiology. 2005; 102(6): 1110–5A. DOI: 10.1097/00000542-200506000-00009
- Hung Tsan S., Viknaswaran N., Lau J., et al. Effectiveness of preoxygenation during endotracheal intubation in a head-elevated position: a systematic review and meta-analysis of randomized controlled trials. Anaesthesiol Intensive Ther. 2022; 54(5): 413–24. DOI: 10.5114/ait.2022.123197
- Shah U., Wong J., Wong D.T., Chung F. Preoxygenation and intraoperative ventilation strategies in obese patients: a comprehensive review. Curr Opin Anaesthesiol 2016; 29: 109–18. DOI: 10.1097/ACO.0000000000000267
- Sreejit M.S., Ramkumar V. Effect of positive airway pressure during pre-oxygenation and induction of anaesthesia upon safe duration of apnoea. Indian J Anaesth. 2015; 59(4): 216–21. DOI: 10.4103/0019-5049.154998
- Harbut P., Gozdzik W., Stjernfält E., et al. Continuous positive airway pressure/pressure support pre-oxygenation of morbidly obese patients. Acta Anaesthesiol Scand. 2014; 58(6): 675–80. DOI: 10.1111/aas.12317
- Delay J.M., Sebbane M., Jung B., et al. The effectiveness of noninvasive positive pressure ventilation to enhance preoxygenation in morbidly obese patients: a randomized controlled study. Anesth Analg. 2008; 107(5): 1707–13. DOI: 10.1213/ane.0b013e318183909b
- Fong K.M., Au S.Y., Ng G.W.Y. Preoxygenation before intubation in adult patients with acute hypoxemic respiratory failure: a network meta-analysis of randomized trials. Crit Care. 2019; 23(1): 319. DOI: 10.1186/s13054-019-2596-1
- Chiang T.L., Tam K.W., Chen J.T. et al. Non-invasive ventilation for preoxygenation before general anesthesia: a systematic review and meta-analysis of randomized controlled trials. BMC Anesthesiol 22, 306 (2022). DOI: 10.1186/s12871-022-01842-y
- Jarzebowski M.L., Kadar R. Pro: The Best Method to Preoxygenate the Physiologically Difficult Airway Is Noninvasive Ventilation. J Cardiothorac Vasc Anesth. 2023; 37(12): 2668–70. DOI: 10.1053/j.jvca.2023.04.036
- Patel A., Nouraei S.A.R. Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRIVE): a physiological method of increasing apnoea time in patients with difficult airways. Anaesthesia. 2015; 70(3): 323–9. DOI: 10.1111/anae.12923
- Mosier J.M., Hypes C.D., Sakles J.C. Understanding preoxygenation and apneic oxygenation during intubation in the critically ill. Intensive Care Med 2017; 43: 226–8. DOI: 10.1007/s00134-016-4426-0
- Fong K.M., Au S.Y., Ng G.W. Preoxygenation before intubation in adult patients with acute hypoxemic respiratory failure: a network meta-analysis of randomized trials. Crit Care 2019; DOI: 10.1186/s13054-019-2596-1
- Jaber S., De Jong A., Schaefer M.S., et al. Preoxygenation with standard facemask combining apnoeic oxygenation using high flow nasal cannula versuss standard facemask alone in patients with and without obesity: the OPTIMASK international study. Ann Intensive Care. 2023; 13(1): 26. DOI: 10.1186/s13613-023-01124-x
- Gibbs K.W., Semler M.W., Driver B.E., et al. PREOXI Investigators and the Pragmatic Critical Care Research Group. Noninvasive Ventilation for Preoxygenation during Emergency Intubation. N Engl J Med. 2024; 390(23): 2165–77. DOI: 10.1056/NEJMoa2313680
- Crístian de Carvalho C., Iliff H.A., et al. Effectiveness of preoxygenation strategies: a systematic review and network meta-analysis. Br J Anaesth. 2024; 133(1): 152–63. DOI: 10.1016/j.bja.2024.02.028
- Joel M., Podder S., Nagesh S.K., et al. Use of a Nasal Cannula as a Preoxygenation Adjunct: A Randomized Crossover Study. Anesthesiol Res Pract. 2024; 5: 7873142. DOI: 10.1155/2024/7873142
- Zhou R., Wang H.T., Gu W. Efficacy of High-Flow Nasal Cannula versus Conventional Oxygen Therapy in Obese Patients during the Perioperative Period: A Systematic Review and Meta-Analysis. Can Respir J. 2022;2022 DOI: 10.1155/2022/4415313
- Maioli D.T., Andrade C.F., Bevilacqua Filho C.T., et al. High-flow nasal therapy: a game-changer in anesthesia and perioperative medicine? Braz J Anesthesiol. 2024; 74(2): 744466. DOI: 10.1016/j.bjane.2023.09.005
- Song J.L., Sun Y., Shi Y.B., et al. Comparison of the effectiveness of high-flow nasal oxygen vs. standard facemask oxygenation for pre- and apneic oxygenation during anesthesia induction: a systematic review and meta-analysis. BMC Anesthesiol. 2022; 22(1): 100. DOI: 10.1186/s12871-022-01615-7
- Merry A.F, van Waart H., Allen S.J., et al. Ease and comfort of pre-oxygenation with high-flow nasal oxygen cannulae vs. facemask: a randomised controlled trial. Anaesthesia. 2022; 77(12): 1346–55. DOI: 10.1111/anae.15853
- Vourc'h M., Huard D., Le Penndu M., et al. High-flow oxygen therapy versus facemask preoxygenation in anticipated difficult airway management (PREOPTI-DAM): an open-label, single-centre, randomised controlled phase 3 trial. EClinicalMedicine. 2023; 60: 101998. DOI: 10.1016/j.eclinm.2023.101998
- Sud A., Athanassoglou V., Anderson E.M., et al. A comparison of gastric gas volumes measured by computed tomography after high-flow nasal oxygen therapy or conventional facemask ventilation. Anaesthesia. 2021; 76(9): 1184–89. DOI: 10.1111/anae.15433
- Sjöblom A., Broms J., Hedberg M., et al. Pre-oxygenation using high-flow nasal oxygen vs. tight facemask during rapid sequence induction. Anaesthesia. 2021; 76(9): 1176–83. DOI: 10.1111/anae.15426
- Bandyopadhyay A. et al. Peri-Intubation Hypoxia After Delayed Versus Rapid Sequence Intubation in Critically Injured Patients on Arrival to Trauma Triage: A Randomized Controlled Trial. Anesth Analg. 2023; 136(5): 913–9. DOI: 10.1213/ANE.0000000000006171
- Endlich Y., Hore P.J., Baker P.A., et al. Updated guideline on equipment to manage difficult airways: Australian and New Zealand College of Anaesthetists. Anaesthesia and Intensive Care. 2022; 50(6): 430–46. DOI: 10.1177/0310057X221082664
- Fayed M., Maroun W., Patel N., Galusca D. Apneic Oxygenation: A Summarized Review and Stepwise Approach. Cureus. 2023; 15(12): e50916. DOI: 10.7759/cureus.50916
- Gleason J.M.., Christian B.R., Barton E.D. Nasal Cannula Apneic Oxygenation Prevents Desaturation During Endotracheal Intubation: An Integrative Literature Review. West J Emerg Med. 2018; 19(2): 403–11. DOI: 10.5811/westjem.2017.12.34699
- Oliveira J E Silva L., Cabrera D., et al. Effectiveness of Apneic Oxygenation During Intubation: A Systematic Review and Meta-Analysis. Ann Emerg Med. 2017; 70(4): 483–94.e11. DOI: 10.1016/j.annemergmed.2017.05.001
- Chrimes N., Higgs A., Marshall S., Cook T. Addressing human factors is crucial to preventing unrecognised oesophageal intubation. Anaesthesia. 2023; 78: 132–4. DOI: 10.1111/anae.15904
- Fletcher G., McGeorge P., Flin R., et al. The role of nontechnical skills in anaesthesia: A review of current literature. Br J Anaesth. 2002; 88(3): 418–29. DOI: 10.1093/bja/88.3.418
- Myatra S.N., Kalkundre R.S., Divatia J.V. Optimizing education in difficult airway management: meeting the challenge. Curr Opin Anaesthesiol. 2017; 30(6): 748–54. DOI: 10.1097/ACO.0000000000000515
- Coyle M., Martin D., McCutcheon K. Interprofessional simulation training in difficult airway management: a narrative review. Br J Nurs. 2020; 29(1) :36–43. DOI: 10.12968/bjon.2020.29.1.36
- Kennedy C.C., Cannon E.K., Warner D.O., Cook D.A. Advanced airway management simulation training in medical education: A systematic review and meta-analysis. Crit Care Med. 2014; 42(1): 169–78. DOI: 10.1097/CCM.0b013e31829a721f
- You-Ten K.E., Bould M.D., Friedman Z., et al. Cricothyrotomy training increases adherence to the ASA difficult airway algorithm in a simulated crisis: A randomized controlled trial. Can J Anaesth. 2015; 62(5): 485–94. DOI: 10.1007/s12630-014-0308-5
- Vincent Hubert, Antoine Duwat, Romain Deransy, Yazine Mahjoub, Hervé Dupont. Effect of Simulation Training on Compliance with Difficult Airway Management Algorithms, Technical Ability, and Skills Retention for Emergency Cricothyrotomy. Anesthesiology 2014; 120: 999–1008 DOI: 10.1097/ALN.0000000000000138
- Kristensen M.S., Teoh W.H., Baker P.A. Percutaneous emergency airway access; prevention, preparation, technique and training. Br J Anaesth. 2015; 114(3): 357–61. DOI: 10.1093/bja/aev029
- Yee B., Naik V.N., Joo H.S., et al. Nontechnical skills in anesthesia crisis management with repeated exposure to simulation-based education. Anesthesiology. 2005; 103(2): 241–8. DOI: 10.1097/00000542-200508000-00006
- Sun Y., Pan C., Li T. et al. Airway management education: simulation based training versus non-simulation based training-A systematic review and meta-analyses. BMC Anesthesiol 17, 17 (2017). DOI: 10.1186/s12871-017-0313-7
- Boet S., Borges B.C., Naik V.N., et al. Complex procedural skills are retained for a minimum of 1 yr after a single high-fidelity simulation training session. Br J Anaesth. 2011; 107(4): 533–39. DOI: 10.1093/bja/aer160
- Gutiérrez-Perdomo V., Tejada-Perdomo J.H., Ramos-Castaneda J.A. Airway management education and retraining: an unresolved paradigm. BMC Anesthesiol. 2024; 24(1): 336. DOI: 10.1186/s12871-024-02637-z
- Bielka K., Kuchyn I., Fomina H., et al. Difficult airway simulation-based training for anaesthesiologists: efficacy and skills retention within six months. BMC Anesthesiol. 2024; 24(1): 44. DOI: 10.1186/s12871-024-02423-x
- Андреенко А.А., Арсентьев Л.В., Цыганков К.А., Щеголев А.В. Эф фективность высокореалистичной симуляции при обучении клинических ординаторов современным алгоритмам решения проблемы «трудных дыхательных путей». Вестник Российской Военно-медицинской академии. 2019; 66(2): 228–32. [Andreenko A.A., Arsenyev L.V., Tsygankov K.A., Shchegolev A.V. Efficiency of highly realistic simulation in training clinical residents in modern algorithms for solving the problem of "difficult airways". Bulletin of the Russian Military Medical Academy. 2019; 66(2): 228–32. (In Russ)]. DOI: 10.17816/brmma25950
- Hepner D.L., Arriaga A.F., Cooper J.B., et al. Operating Room Crisis Checklists and Emergency Manuals. Anesthesiology. 2017; 127(2): 384–92. DOI: 10.1097/ALN.0000000000001731
- Forristal C., Hayman K., Smith N., et al. Does utilization of an intubation safety checklist reduce omissions during simulated resuscitation scenarios: a multi-center randomized controlled trial. CJEM. 2021; 23(1): 45–53. DOI: 10.1007/s43678-020-00010-w
- Turner J.S., Bucca A.W., Propst S.L., et al. Association of Checklist Use in Endotracheal Intubation With Clinically Important Outcomes: A Systematic Review and Meta-analysis. Association of Checklist Use in Endotracheal Intubation With Clinically Important Outcomes: A Systematic Review and Meta-analysis. JAMA Netw Open. 2020; 3(7): e209278. DOI: 10.1001/jamanetworkopen.2020.9278
- Sillén A. Cognitive tool for dealing with unexpected difficult airway. Br J Anaesth. 2014; 112(4): 773–4. DOI: 10.1093/bja/aeu085
- Duggan L.V., Brindley P.G. & Law J.A. Improving communication, teamwork, and action during a “cannot intubate cannot oxygenate (CICO)” emergency: employing CICO as a cognitive aid mnemonic. Can J Anesth/J Can Anesth 65, 1087–1092 (2018). DOI: 10.1007/s12630-018-1193-0
- Zasso F.B., Perelman V.S., Ye X.Y., et al. Effects of prior exposure to a visual airway cognitive aid on decision-making in a simulated airway emergency: A randomised controlled study [Internet]. Eur J Anaesthesiol. 2021; 38(8): 831–8. DOI: 10.1097/EJA.0000000000001510
- Simmons W.R., Huang J. Operating Room Emergency Manuals Improve Patient Safety: A Systemic Review. Cureus. 2019; 12; 11(6): e4888. DOI: 10.7759/cureus.4888
- Chowdhury R., Orishchak O., Mascarella M.A., et al. Emergency Airway Management: A Systematic Review on the Effectiveness of Cognitive Aids in Improving Outcomes and Provider Performance. Clinics and Practice. 2025; 15(1): 13. DOI: 10.3390/clinpract15010013
- Ahmad I., El-Boghdadly K., Bhagrath R., et al. Difficult Airway Society guidelines for awake tracheal intubation (ATI) in adults. Anaesthesia. 2020; 75(4): 509–28. DOI: 10.1111/anae.14904
- Greib N., Stojeba N., Dow W.A., et al. A combined rigid videolaryngoscopy-flexible fibrescopy intubation technique under general anesthesia. Can J Anaesth. 2007; 54(6): 492–3. DOI: 10.1007/BF03022046
- Sahay N., Kumer R., Naaz S., et al. Awake supraglottic airway guided intubation: for the patient, by the patient. Korean J Anesthesiol. 2020; 73(3): 262–3. DOI: 10.4097/kja.20055
- Bhalotra A.R. Awake supraglottic airway guided flexible bronchoscopic intubation. Korean J Anesthesiol. 2020; 73(2): 173–4. DOI: 10.4097/kja.20013
- Mendonca C., Mesbah A., Velayudhan A., et al.A randomised clinical trial comparing the flexible fibrescope and the Pentax Airway Scope (AWS)® for awake oral tracheal intubation. Anaesthesia. 2016; 71: 908–14. DOI: 10.1111/anae.13516
- Gaszyński T. The use of the C-MAC videolaryngoscope for awake intubation in patients with a predicted extremely difficult airway: case series. Ther Clin Risk Manag. 2018; 14: 539–42. DOI: 10.2147/TCRM.S150536
- Alhomary M., Ramadan E., Curran E., et al. Videolaryngoscopy vs. fibreoptic bronchoscopy for awake tracheal intubation: a systematic review and meta-analysis. Anaesthesia. 2018; 73(9): 1151–61. DOI: 10.1111/anae.14299
- Merola R., Vargas M., Marra A., et al. Videolaryngoscopy versus Fiberoptic Bronchoscopy for Awake Tracheal Intubation: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. J Clin Med. 2024; 29; 13(11): 3186. DOI: 10.3390/jcm13113186
- Yu T., Wu R.R., Longhini F., et al. The "BURP" maneuver improves the glottic view during laryngoscopy but remains a difficult procedure. J Int Med Res. 2020; 48(5): 300060520925325. DOI: 10.1177/0300060520925325
- Akihisa Y., Hoshijima H., Maruyama K., et al. Effects of sniffing position for tracheal intubation: A meta analysis of randomized controlled trials. Am J Emerg Med. 2015; 33(11): 1606–11. DOI: 10.1016/j.ajem.2015.06.049
- Akhtar M., Ali Z., Hassan N., et al. A randomized study comparing the sniffing position with simple head extension for glottis visualization and difficulty in intubation during direct laryngoscopy. Anesth Essays Res. 2017; 11(3): 762–6. DOI: 10.4103/0259-1162.204206
- Rao S.L., Kunselman A.R., Schuler H.G., et al.Laryngoscopy and tracheal intubation in the head-elevated position in obese patients: a randomized, controlled, equivalence trial. Anesth Analg. 2008; 107(6): 1912–18. DOI: 10.1213/ane.0b013e31818556ed
- Pachisia A.V., Sharma K.R., Dali J.S., et al. Comparative evaluation of laryngeal view and intubating conditions in two laryngoscopy positions-attained by conventional 7 cm head raise and that attained by horizontal alignment of external auditory meatus - sternal notch line – using an inflatable pillow — A prospective randomised cross-over trial. J Anaesthesiol Clin Pharmacol. 2019; 35(3): 312–17. DOI: 10.4103/joacp.JOACP_35_19
- Chun E.H., Chung M.H., Kim J.E. et al. Effects of head-elevated position on tracheal intubation using a McGrath MAC videolaryngoscope in patients with a simulated difficult airway: a prospective randomized crossover study. BMC Anesthesiol 22, 166 (2022). DOI: 10.1186/s12871-022-01706-5
- Okada Y., Nakayama Y., Hashimoto K., et al. Ramped versus sniffing position for tracheal intubation: A systematic review and meta-analysis. Am J Emerg Med. 2020; 1: S0735–6757(20)30214-X. DOI: 10.1016/j.ajem.2020.03.058
- Semler M.W., Janz D.R., Russell D.W., et al. A Multicenter, randomized trial of ramped position vs. sniffing position during endotracheal intubation of critically ill adults. Chest. 2017; 152(4): 712–22. DOI: 10.1016/j.chest.2017.03.061
- Hasanin A., Tarek H., Mostafa M.M.A. et al. Modified-ramped position: a new position for intubation of obese females: a randomized controlled pilot study. BMC Anesthesiol 20, 151 (2020). DOI: 10.1186/s12871-020-01070-2
- Hasegawa K., Shigemitsu K., Hagiwara Y., et al. Association between repeated intubation attempts and adverse events in emergency departments: an analysis of a multicenter prospective observational study. Ann Emerg Med. 2012; 60(6): 749–54.e2. DOI: 10.1016/j.annemergmed.2012.04.005
- Hoshijima H., Mihara T., Maruyama K., et al. C-MAC videolaryngoscope versus Macintosh laryngoscope for tracheal intubation: A systematic review and meta-analysis with trial sequential analysis. J Clin Anesth. 2018; 49: 53–62. DOI: 10.1016/j.jclinane.2018.06.007
- Pieters B.M., Maas E.H., Knape J.T., et al. Videolaryngoscopy vs. direct laryngoscopy use by experienced anaesthetists in patients with known difficult airways: a systematic review and meta-analysis.Anaesthesia. 2017; 72(12): 1532–41. DOI: 10.1111/anae.14057
- Hansel J., Rogers A.M., Lewis S.R., et al. Videolaryngoscopy versus direct laryngoscopy for adults undergoing tracheal intubation. Cochrane Database Syst Rev. 2022; 4(4): CD011136. DOI: 10.1002/14651858.CD011136.pub3
- Saul S.A., Ward P.A., McNarry A.F. Airway Management: The Current Role of Videolaryngoscopy. J Pers Med. 2023; 13(9): 1327. DOI: 10.3390/jpm13091327
- Ruetzler K., Bustamante S., Schmidt M.T., et al. Collaborative VLS Trial Group. Video Laryngoscopy vs Direct Laryngoscopy for Endotracheal Intubation in the Operating Room: A Cluster Randomized Clinical Trial. JAMA. 2024; 18: e240762. DOI: 10.1001/jama.2024.0762
- Köhl V., Wünsch V.A., Müller M.C., et al. Hyperangulated vs. Macintosh videolaryngoscopy in adults with anticipated difficult airway management: a randomised controlled trial. Anaesthesia. 2024; 79(9): 957–66. DOI: 10.1111/anae.16326
- Malik M.A., Subramaniam R., et al. Randomized controlled trial of the Pentax AWS, Glidescope, and Macintosh laryngoscopes in predicted difficult intubation. Br J Anaesth. 2009; 103(5): 761–8. DOI: 10.1093/bja/aep266
- Aziz M.F., Dillman D., Fu R., Brambrink A.M. Comparative effectiveness of the C-MAC video laryngoscope versus direct laryngoscopy in the setting of the predicted difficult airway. Anesthesiology. 2012; 116(3): 629–36. DOI: 10.1097/ALN.0b013e318246ea34
- Zaki H.A., Shaban E., Elgassim M., et al. A. Systematic Review and Meta-Analysis of Randomized Controlled Trials (RCTs) Revealing the Future of Airway Management: Video Laryngoscopy vs. Macintosh Laryngoscopy for Enhanced Clinical Outcomes. Cureus. 2023; 15(12): e50648. DOI: 10.7759/cureus.50648
- Merola R., Mancino D., Vargas M. Videolaryngoscopy versus direct laryngoscopy: a bibliometric analysis. Br J Anaesth. 2024; 132(1): 166–8. DOI: 10.1016/j.bja.2023.09.029
- Cook T.M., Aziz M.F. Has the time really come for universal videolaryngoscopy? Br J Anaesth. 2022; 129(4): 474–7. DOI: 10.1016/j.bja.2022.07.038
- Becerra Gómez C.C., Ángel Rojas M. Should videolaryngoscopy be routinely used for airway management? An approach from different scenarios in medical practice. Colomb. J. Anesthesiol. 2023; 24; 52(1). DOI: 10.5554/22562087.e1084
- Alsabri M., Abdelwahab O.A., Elsnhory A.B., et al. Video laryngoscopy versus direct laryngoscopy in achieving successful emergency endotracheal intubations: a systematic review and meta-analysis of randomized controlled trials. Syst Rev. 2024; 12; 13(1): 85. DOI: 10.1186/s13643-024-02500-9
- Kriege M., Lang P., Lang C., et al. comparison of the McGrath videolaryngoscope with direct laryngoscopy for rapid sequence intubation in the operating theatre: a multicentre randomised controlled trial. Anaesthesia. 2024; 79(8): 801–9. DOI: 10.1111/anae.16250
- Oxenham O., Pairaudeau C., Moody T., et al. Standard and flexible tip bougie for tracheal intubation using a non-channelled hyperangulated videolaryngoscope: a randomised comparison. Anaesthesia. 2022; 77(12): 1368–75. DOI: 10.1111/anae.15854
- Eum D., Ji Y.J., Kim H.J. Comparison of the success rate of tracheal intubation between stylet and bougie with a hyperangulated videolaryngoscope: a randomised controlled trial. Anaesthesia. 2024; 79(6): 603–10. DOI: 10.1111/anae.16202
- Weingart S.D., Driver B. Meta-analysis on bougie use for emergency airways. J Trauma Acute Care Surg. 2019; 87(3): 741. DOI: 10.1097/TA.0000000000002352
- Driver B.E., Prekker M.E., Klein L.R., et al. Effect of Use of a Bougie vs Endotracheal Tube and Stylet on First-Attempt Intubation Success Among Patients With Difficult Airways Undergoing Emergency Intubation: A Randomized Clinical Trial. JAMA. 2018; 319(21): 2179–2189. DOI: 10.1001/jama.2018.6496
- Sheu Y.J., Yu S.W., Huang T.W., et al. Comparison of the efficacy of a bougie and stylet in patients with endotracheal intubation: A meta-analysis of randomized controlled trials. J Trauma Acute Care Surg. 2019; 86(5): 902–8. DOI: 10.1097/TA.0000000000002216
- Ong S., Moll V., Moser B., et al. Intubating through supraglottic airway devices: a narrative review. Anesthesiol Pain Med. 2021; 11: e113719. DOI: 10.5812/aapm.113719
- Laferrière-Langlois P., Dion A., Guimond É., et al. A randomized controlled trial comparing three supraglottic airway devices used as a conduit to facilitate tracheal intubation with flexible bronchoscopy. Can J Anaesth. 2023; 70(5): 851–60. DOI: 10.1007/s12630-023-02444-z
- Zhang K., Zhou M., Zou Z., et al. Supraglottic airway devices: a powerful strategy in airway management. Am J Cancer Res. 2024; 14(1): 16–32.
- Bergold M.N., Kahle S., Schultzik T., et al. Intubating laryngeal tube suction disposable: Initial clinical experiences with a novel device for endotracheal intubation. Anaesthesist. 2016; 65(1): 30–5. DOI: 10.1007/s00101-015-0100-0
- Ott T., Fischer M., Limbach T., et al. The novel intubating laryngeal tube (iLTS-D) is comparable to the intubating laryngeal mask (Fastrach) — a prospective randomised manikin study. Scand J Trauma Resusc Emerg Med. 2015; 23: 44. DOI: 10.1186/s13049-015-0126-y
- Shyam R., Chaudhary A.K., Sachan P., et al. Evaluation of Fastrach laryngeal mask airway as an alternative to fiberoptic bronchoscope to manage difficult airway: a comparative study. J Clin Diagn Res. 2017; 11(1): UC09–UC12. DOI: 10.7860/JCDR/2017/22001.9284
- Gómez-Ríos M.Á., López T., Sastre J.A., et al. Video laryngeal masks in airway management. Expert Rev. Med. Devices. 2022; 19: 847–58. DOI: 10.1080/17434440.2022.2142558
- Yan C.L., Zhang Y.Q., Chen Y., et al. Comparison of SaCoVLM™ video laryngeal mask-guided intubation and i-gel combined with flexible bronchoscopy-guided intubation in airway management during general anesthesia: a non-inferiority study. BMC Anesthesiol. 2022; 22(1): 302. DOI: 10.1186/s12871-022-01843-x
- Van Zundert A.A.J., Gatt S.P., van Zundert T.C.R.V., et al. Supraglottic Airway Devices: Present State and Outlook for 2050. Anesth Analg. 2024; 138(2): 337–49. DOI: 10.1213/ANE.0000000000006673
- Castillo-Monzón C.G., Gaszyński T., Marroquín-Valz H.A., et al. Supraglottic Airway Devices with Vision Guided Systems: Third Generation of Supraglottic Airway Devices. J Clin Med. 2023; 12(16): 5197. DOI: 10.3390/jcm12165197
- Gaszynski T. New vision-incorporated third-generation video laryngeal mask airways for intubation of patients in prone position. J. Clin. Monit Comput. 2023; 37: 705–7. DOI: 10.1007/s10877-022-00925-y
- Kleine-Brueggeney M., Greif R., Urwyler N., et al. The performance of rigid scopes for tracheal intubation: a randomised, controlled trial in patients with a simulated difficult airway. Anaesthesia. 2016; 71(12): 1456–63. DOI: 10.1111/anae.13626
- Alvis B.D., King A.B., Hester D., et al. Randomized controlled pilot trial of the rigid and flexing laryngoscope versus the fiberoptic bronchoscope for intubation of potentially difficult airway. Minerva Anestesiol. 2015; 81(9): 946–50.
- Mao Xu, Xiao-Xi Li, Xiang-Yang Guo, et al. Shikani Optical Stylet versus Macintosh Laryngoscope for Intubation in Patients Undergoing Surgery for Cervical Spondylosis: A Randomized Controlled Trial. Chin Med J Engl) 2017; 130(3): 297–302. DOI: 10.4103/0366-6999.198926
- Matek J., Kolek F., Klementova O., et al. T. Optical Devices in Tracheal Intubation-State of the Art in 2020. Diagnostics (Basel). 2021; 11(3): 575. DOI: 10.3390/diagnostics11030575
- Mahrous R.S.S., Ahmed A.M.M. The Shikani Optical Stylet as an Alternative to Awake Fiberoptic Intubation in Patients at Risk of Secondary Cervical Spine Injury: A Randomized Controlled Trial. J Neurosurg Anesthesiol. 2018; 30(4): 354–8. DOI: 10.1097/ANA.0000000000000454
- Pius J., Ioanidis K., Noppens R.R. Use of the Novel C-MAC Video Stylet in a Case of Predicted Difficult Intubation: A Case Report. A A Pract. 2019; 13(3): 88–90. DOI: 10.1213/XAA.0000000000000998
- Webb A., Kolawole H., Leong S., et al. Comparison of the Bonfils and Levitan optical stylets for tracheal intubation: a clinical study. Anaesth Intensive Care. 2011; 39(6): 1093–7. DOI: 10.1177/0310057X1103900618
- Jhuang B.J., Luk H.N., Qu J.Z., et al. Video-Twin Technique for Airway Management, Combining Video-Intubating Stylet with Videolaryngoscope: A Case Series Report and Review of the Literature. Healthcare (Basel). 2022; 10(11): 2175. DOI: 10.3390/healthcare10112175
- Pieters B.M., Theunissen M., van Zundert A.A. Macintosh blade videolaryngoscopy combined with rigid bonfils intubation endoscope offers a suitable alternative for patients with difficult airways. Anesth Analg. 2018; 126(3): 988–94. DOI: 10.1213/ANE.0000000000002739
- Van Zundert A.A., Pieters B.M. Combined technique using videolaryngoscopy and Bonfils for a difficult airway intubation. Br J Anaesth. 2012; 108(2): 327–8. DOI: 10.1093/bja/aer471
- Sharawy S.S., El-Shafie S.M., El-miteny S.Y., et al. Intubation through air-Q and LMA-Excel using Shikani optical stylet in normal versus simulated difficult airway. Res Opin Anesth Intensive Care 2017; 4: 247–54.
- Tonner P.H., Scholz J., Pothmann W. Die unerwartete schwierige Intubation: Fiberoptische endotracheale Intubation über die Kehlkopfmaske [Unexpectedly difficult intubation: fiberoptic endotracheal intubation with the laryngeal mask]. Anasthesiol Intensivmed Notfallmed Schmerzther. 1995; 30(3): 192–5. German. DOI: 10.1055/s-2007-996476. PMID: 7605845.
- Gaszyński T., Gómez-Ríos M.Á., Serrano-Moraza A., et al. New Devices, Innovative Technologies, and Non-Standard Techniques for Airway Management: A Narrative Review. Healthcare (Basel). 2023; 11(18): 2468. DOI: 10.3390/healthcare11182468
- Jackson A.H., Orr B., Yeo C., et al. Multiple sites of impingement of a tracheal tube as it is advanced over a fibreoptic bronchoscope or tracheal tube introducer in anaesthetized, paralysed patients. Anaesth Intensive Care. 2006; 34(4) :444–9. DOI: 10.1177/0310057X0603400409
- Koopman E.M., van Emden M.W., Geurts J.J.G., et al. Comparison of videolaryngoscopy alone with video-assisted fibreoptic intubation in a difficult cadaver airway model. Eur J Anaesthesiol. 2021; 38(3): 318–19. DOI: 10.1097/EJA.0000000000001333. PMID: 33538435.
- Lenhardt R., Burkhart M.T., Brock G.N., et al. Is video laryngoscope-assisted flexible tracheoscope intubation feasible for patients with predicted difficult airway? A prospective, randomized clinical trial. Anesth Analg. 2014; 118(6): 1259–65. DOI: 10.1213/ANE.0000000000000220
- Riegel A.K., Winterhalter M. Combining Videolaryngoscopy With Fiber-Optic Orotracheal Intubation for Inclusion in the Nonemergency Pathway of the Difficult Airway Algorithm. A A Pract. 2019; 12(1): 28–9. DOI: 10.1213/XAA.0000000000000849
- Chung M.Y., Park B., Seo J., Kim C.J. Successful airway management with combined use of McGrath® MAC video laryngoscope and fiberoptic bronchoscope in a severe obese patient with huge goiter -a case report. Korean J Anesthesiol. 2018; 71(3): 232–6. DOI: 10.4097/kja.d.18.27203
- Kim S.M., Kim H.J. Successful advancement of endotracheal tube with combined fiberoptic bronchoscopy and videolaryngoscopy in a patient with a huge goiter. SAGE Open Med Case Rep. 2020; 8: 2050313X20923232. DOI: 10.1177/2050313X20923232
- Ara T., Mori G., Adachi E., et al. Combined use of the GlideScope and fiberoptic bronchoscope for tracheal intubation in a patient with difficult airway. Masui 2014; 63: 647–9.
- Dong Y., Li G., Wu W., et al. Lightwand-guided nasotracheal intubation in oromaxillofacial surgery patients with anticipated difficult airways: a comparison with blind nasal intubation. Int J Oral Maxillofac Surg. 2013; 42(9): 1049–53. DOI: 10.1016/j.ijom.2013.01.027
- Sui J.H., Mao P., Liu J.H., et al. Transillumination-assisted orotracheal intubation: a comparison of the Bonfils fibrescope and the lightwand (Trachlight). Acta Anaesthesiol Scand. 2012; 56(5): 565–70. DOI: 10.1111/j.1399-6576.2011.02627.x
- Bamgbade O.A. The use of intubating lightwand in difficult airway patients with limited management options. Niger Postgrad Med J. 2017; 24(3): 187–90. DOI: 10.4103/npmj.npmj_134_17
- Malpas G., Hung O., Gilchrist A., et al. The use of extracorporeal membrane oxygenation in the anticipated difficult airway: a case report and systematic review. Can J Anaesth. 2018; 65(6): 685–97. English. DOI: 10.1007/s12630-018-1099-x.
- Zhang S.L., Zheng W., Zhang Q.F., et al. Veno-venous extracorporeal membrane oxygenation-assisted treatment of severe airway stenosis due to goiter: Two case reports. Medicine (Baltimore). 2024; 103(36): e39506. DOI: 10.1097/MD.0000000000039506
- Fan, Z., Zhu, S., Chen, J. et al. The application of extracorporeal membrane oxygenation in emergent airway management - a single-center retrospective study. J Cardiothorac Surg 19, 20 (2024). DOI: 10.1186/s13019-024-02482-8
- Strong A., Fletcher C., Budge M., et al. The use of extracorporeal membrane oxygenation for elective removal of a massive goitre causing a potentially difficult airway. ANZ J Surg. 2023; 93(11): 2758–9. DOI: 10.1111/ans.18598
- Bozer J., Vess A., Pineda P., Essandoh M., et al. Venovenous Extracorporeal Membrane Oxygenation for a Difficult Airway Situation-A Recommendation for Updating the American Society of Anesthesiologists' 'Difficult Airway Algorithm'. J Cardiothorac Vasc Anesth. 2023; 37(12): 2646–56. DOI: 10.1053/j.jvca.2023.04.027
- Joseph T.T., Gal J.S., DeMaria S.J., et al. A retrospective study of success, failure, and time needed to perform awake intubation. Anesthesiology. 2016; 125(1): 105–14. DOI: 10.1097/ALN.0000000000001140
- Lim W.Y., Wong P. Awake supraglottic airway guided flexible bronchoscopic intubation in patients with anticipated difficult airways: a case series and narrative review. Korean J Anesthesiol. 2019; 72(6): 548–57. DOI: 10.4097/kja.19318
- Wong P., Lim W.Y. Difficult Airway Society awake intubation guidelines: supraglottic airway-guided flexible bronchoscopic intubation as an alternative. Korean J Anesthesiol. 2020; 73(4): 352–3. DOI: 10.4097/kja.20174
- Gupta S., Macneil R., Bryson G. Laryngoscopy in conscious patients with remifentanil: how useful is an "awake look"? J Clin Anesth. 2012; 24: 19–24. DOI: 10.1016/j.jclinane.2011.04.012
- Rosenstock C.V., Thogersen B., Afshari A., et al. Awake fiberoptic or awake video laryngoscopic tracheal intubation in patients with anticipated difficult airway management: a randomized clinical trial. Anesthesiology. 2012; 116(6) :1210–16. DOI: 10.1097/ALN.0b013e318254d085
- Moore A., El‐Bahrawy A., El‐Mouallem E., et al. Videolaryngoscopy or fibreoptic bronchoscopy for awake intubation of bariatric patients with predicted difficult airways – a randomised, controlled trial. Anaesthesia. 2017; 72(4): 538–9. DOI: 10.1111/anae.13850
- Mendonca C., Mesbah A., Velayudhan A., Danha R. A randomised clinical trial comparing the flexible fibrescope and the Pentax Airway Scope (AWS)(®) for awake oral tracheal intubation. Anaesthesia. 2016: 71(8): 908–14. DOI: 10.1111/anae.13516
- Taboada M., Fernández J., Estany-Gestal A., et al. First-attempt awake tracheal intubation success rate using a hyperangulated unchannelled videolaryngoscope vs. a channelled videolaryngoscope in patients with anticipated difficult airway: a randomised controlled trial. Anaesthesia. 2024; 79(11): 1157–64. DOI: 10.1111/anae.16389
- Quintão V.C., Carvalho V.H., Costa L.G.V.D., et al. Videolaryngoscopy in anesthesia and perioperative medicine: innovations, challenges, and best practices. Braz J Anesthesiol. 2023; 73(5): 525–8. DOI: 10.1016/j.bjane.2023.08.003
- Badiger S., John M., Fearnley R.A., et al. Optimizing oxygenation and intubation conditions during awake fibre‐optic intubation using a high‐flow nasal oxygen‐delivery system. Br J Anaesth. 2015; 115(4): 629–32. DOI: 10.1093/bja/aev262
- Xue F.S., Liu H.P., He N., et al. Spray‐as‐you‐go airway topical anesthesia in patients with a difficult airway: a randomized, double‐blind comparison of 2 % and 4 % lidocaine. Anesth Analg. 2009; 108(2): 536–43. DOI: 10.1213/ane.0b013e31818f1665
- Kostyk P., Francois K., Salik I. Airway Anesthesia for Awake Tracheal Intubation: A Review of the Literature. Cureus. 2021; 13(7): e16315. DOI: 10.7759/cureus.16315. PMID: 34405073; PMCID: PMC8354742
- Cabrini L., Baiardo Redaelli M., Ball L., et al. Awake fiberoptic intubation protocols in the operating room for anticipated difficult airway: a systematic review and meta‐analysis of randomized controlled trials. Anesth Analg. 2019; 128(5): 971–80. DOI: 10.1213/ANE.0000000000004087
- Koga K., Asai T., Latto I.P., et al. Effect of the size of a tracheal tube and the efficacy of the use of the laryngeal mask for fibrescope‐aided tracheal intubation. Anaesthesia. 1997; 52(2): 131–5. DOI: 10.1111/j.1365-2044.1997.31-az0058.x
- Lucas D.N., Yentis S.M. A comparison of the intubating laryngeal mask tracheal tube with a standard tracheal tube for fibreoptic intubation. Anaesthesia. 2000; 55(4): 358–61. DOI: 10.1046/j.1365-2044.2000.01321.x
- Jafari A., Gharaei B., Reza Kamranmanesh M., et al. Wire reinforced endotracheal tube compared with Parker Flex‐Tip tube for oral fiberoptic intubation: a randomized clinical trial. Minerva Anestesiol. 2014; 80(3): 324–9.
- Sharma D., Bithal P.K., Rath G.P., et al. Effect of orientation of a standard polyvinyl chloride tracheal tube on success rates during awake flexible fibreoptic intubation. Anaesthesia. 2006; 61(9) :845–8. DOI: 10.1111/j.1365-2044.2006.04750.x
- He X-Y, Cao J-P, He Q, Shi XY. Dexmedetomidine for the management of awake fibreoptic intubation. Cochrane Database of Systematic Reviews 2014, Issue 1. Art. No.: CD009798. DOI: 10.1002/14651858.CD009798.pub2
- Tang Z.H., Chen Q., Wang X., et al. A systematic review and meta-analysis of the safety and efficacy of remifentanil and dexmedetomidine for awake fiberoptic endoscope intubation. Medicine (Baltimore). 2021; 100(14): e25324. DOI: 10.1097/MD.0000000000025324
- El-Boghdadly K, Desai N, Jones JB, et al. Sedation for awake tracheal intubation: A systematic review and network meta-analysis. Anaesthesia. 2025; 80(1): 74–84. DOI: 10.1111/anae.16452
- Higgs A., McGrath B.A., Goddard C., et al. Guidelines for the management of tracheal intubation in critically ill adults. Br J Anaesth. 2018; 120(2): 323–52. DOI: 10.1016/j.bja.2017.10.021
- Balafar M., Pouraghaei M., Paknezhad S.P., et al. Evaluation the quality of bag-mask ventilation by E/C, T/E and hook technique (a new proposed technique). BMC Anesthesiol. 2023; 23(1): 384. DOI: 10.1186/s12871-023-02349-w
- Appukuttan V., Elakkumanan L.B., Vasudevan A. Comparing the efficacy of modified thenar eminence technique with conventional thenar eminence technique of mask ventilation during induction of general anaesthesia - A randomised crossover study. Indian J Anaesth. 2022; 66(10): 694–99. DOI: 10.4103/ija.ija_91_22
- De Carvalho C.C., Kapsokalyvas I., El-Boghdadly K. Second-Generation Supraglottic Airway Devices Versus Endotracheal Intubation in Adults Undergoing Abdominopelvic Surgery: A Systematic Review and Meta-Analysis. Anesth Analg. 2025;140(2): 265–75. DOI: 10.1213/ANE.0000000000006951
- Park S.K., Ko G., Choi G.J., et al. Comparison between supraglottic airway devices and endotracheal tubes in patients undergoing laparoscopic surgery: A systematic review and meta-analysis. Medicine (Baltimore). 2016; 95(33): e4598. DOI: 10.1097/MD.0000000000004598
- Cook T.M., Kelly F.E. Time to abandon the ‘vintage’ laryngeal mask airway and adopt second-generation supraglottic airway devices as first choice. Br J Anaesth. 2015; 115(4): 497–9. DOI: 10.1093/bja/aev156
- Van Zundert A.A.J., Gatt S.P., van Zundert T.C.R.V., et al. Supraglottic Airway Devices: Present State and Outlook for 2050. Anesth Analg. 2024; 138(2): 337–49. DOI: 10.1213/ANE.0000000000006673
- Long R.Q., Yu D.S., Liu Z.H., et al. Application of surgical cricothyrotomy in emergency and complicated airway management. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2018; 32(16): 1247–51. Chinese. DOI: 10.13201/j.issn.1001-1781.2018.16.009
- Nachshon A., Firman S., Batzofin B.M., et al. Can't intubate, can't oxygenate? What is the preferred surgical strategy? A retrospective analysis. Anaesthesiol Intensive Ther. 2024; 56(1): 37–46. DOI: 10.5114/ait.2024.138437
- De Vore E.K., Redmann A., Howell R., et al. Best practices for emergency surgical airway: A systematic review. Laryngoscope Investig Otolaryngol. 2019; 4(6): 602–8. DOI: 10.1002/lio2.314
- Zasso F.B., You-Ten K.E., Ryu M. et al. Complications of cricothyroidotomy versus tracheostomy in emergency surgical airway management: a systematic review. BMC Anesthesiol 20, 216 (2020). DOI: 10.1186/s12871-020-01135-2
- Tessarolo E., Alkhouri H., Lelos N., et al. Review article: Effectiveness and risks of cricoid pressure during rapid sequence induction for endotracheal intubation in the emergency department: A systematic review. Emerg Med Australas. 2022; 34(4): 484–91. DOI: 10.1111/1742-6723.13993
- Birenbaum A., Hajage D., Roche S., et al. IRIS Investigators Group. Effect of Cricoid Pressure Compared With a Sham Procedure in the Rapid Sequence Induction of Anesthesia: The IRIS Randomized Clinical Trial. JAMA Surg. 2019; 1; 154(1): 9–17. DOI: 10.1001/jamasurg.2018.3577. Erratum in: JAMA Surg. 2019; 1; 154(1): 96. DOI: 10.1001/jamasurg.2018.5449
- Algie C.M., Mahar R.K., Tan H.B., et al. Effectiveness and risks of cricoid pressure during rapid sequence induction for endotracheal intubation. Cochrane Database Syst Rev. 2015; 2015(11): CD011656. DOI: 10.1002/14651858.CD011656.pub2
- Vasudevan A., Srinivasan S., Vinayagam S., et al. Assessment of effectiveness of cricoid pressure in preventing gastric insufflation during bag and mask ventilation: A randomized controlled trial. Saudi J Anaesth. 2018; 12(4): 606–11. DOI: 10.4103/sja.SJA_240_18
- Bermede O., Meço B.C., Baytaş V., et al. What About Compressing the Oesophagus with an Ultrasound Probe for a Modified Sellick Maneuver? Turk J Anaesthesiol Reanim. 2022; 50(1): 13–17. DOI: 10.5152/TJAR.2021.1427
- Grmec S. Comparison of three different methods to confirm tracheal tube placement in emergency intubation. Intensive Care Med. 2002; 28(6): 701–4. DOI: 10.1007/s00134-002-1290-x
- Bozeman W.P., Hexter D., Liang H.K., et al. Esophageal detector device versus detection of end-tidal carbon dioxide level in emergency intubation. Ann Emerg Med. 1996; 27(5): 595–9. DOI: 10.1016/s0196-0644(96)70162-2
- Das S.K., Choupoo N.S., Haldar R., et al. Transtracheal ultrasound for verification of endotracheal tube placement: a systematic review and meta-analysis. Can J Anaesth. 2015; 62(4): 413–23. DOI: 10.1007/s12630-014-0301-z
- Abhishek C., Munta K., Rao S.M., et al. End-tidal capnography and upper airway ultrasonography in the rapid confirmation of endotracheal tube placement in patients requiring intubation for general anaesthesia. Indian J Anaesth. 2017; 61(6): 486–9. DOI: 10.4103/ija.IJA_544_16
- Hansel J., Law J.A., Chrimes N., et al. Clinical tests for confirming tracheal intubation or excluding oesophageal intubation: a diagnostic test accuracy systematic review and meta-analysis. Anaesthesia. 2023; 78(8): 1020–30. DOI: 10.1111/anae.16059
- Kelly J.J., Eynon C.A., Kaplan J.L., et al. Use of tube condensation as an indicator of endotracheal tube placement. Ann Emerg Med. 1998; 31(5): 575–8. DOI: 10.1016/s0196-0644(98)70204-5
- Klein A.A., Meek T., Allcock E., et al. Recommendations for standards of monitoring during anaesthesia and recovery 2021: Guideline from the Association of Anaesthetists. Anaesthesia. 2021; 76(9): 1212–23. DOI: 10.1111/anae.15501
- Committee on Standards and Practice Parameters (CSPP). Standards for Basic Anesthetic Monitoring (Last Affirmed: December 13, 2020). Available: https://www.asahq.org/standards-and-practice-parameters/standards-for-basic-anesthetic-monitoring. Accessed: 17/02/2022.
- Cook T.M., Harrop G.W. Capnography prevents avoidable deaths. BMJ. 2019; 364: l439. DOI: 10.1136/bmj.l439
- Asai T., Shingu K. Case report: A normal capnograph despite esophageal intubation. Can J Anaesth. 2001; 48(10): 1025–8. DOI: 10.1007/BF03016595
- Kramer-Johansen J., Dorph E., Steen P.A. Detection of carbon dioxide in expired air after oesophageal intubation; the role of bystander mouth-to-mouth ventilation. Acta Anaesthesiol Scand. 2008; 52(1): 155–7. DOI: 10.1111/j.1399-6576.2007.01503.x
- McCabe E.B., Lukins M. Gastric carbon dioxide insufflation can lead to misleading capnography trace during esophageal intubation. A A Pract. 2018; 11(11): 328. DOI: 10.1213/XAA.0000000000000898
- Cook T.M., Nolan J.P. Use of capnography to confirm correct tracheal intubation during cardiac arrest. Anaesthesia. 2011; 66(12): 1183–4. DOI: 10.1111/j.1365-2044.2011.06964.x
- Malamal Pradeep S., Ann Benny H. Comparison of Upper Airway Ultrasonography Against Quantitative Waveform Capnography for Validating Endotracheal Tube Position in a South Indian Population. Cureus. 2024; 16(1): e52628. DOI: 10.7759/cureus.52628
- Neethirajan S.G.R., Baskar G., Parameswari A. Focus on POCUS: Identification of Early Successful Intubation by Point-of-Care Ultrasound Versus End-Tidal Carbon Dioxide: A Prospective Comparative Study. Turk J Anaesthesiol Reanim. 2024; 52(6): 240–6. DOI: 10.4274/TJAR.2024.241720
- Gottlieb M., Holladay D., Peksa G.D. Ultrasonography for the Confirmation of Endotracheal Tube Intubation: A Systematic Review and Meta-Analysis. Ann. Emerg. Med. 2018; 72: 627–36. DOI: 10.1016/j.annemergmed.2018.06.024
- Dhir A., Bhasin D., Bhasin-Chhabra B., Koratala A. Point-of-Care Ultrasound: A Vital Tool for Anesthesiologists in the Perioperative and Critical Care Settings. Cureus. 2024; 16(8): e66908. DOI: 10.7759/cureus.66908
- Roy P.S., Joshi N., Garg M., et al. Comparison of ultrasonography, clinical method and capnography for detecting correct endotracheal tube placement- A prospective, observational study. Indian J Anaesth. 2022; 66(12) :826–31. DOI: 10.4103/ija.ija_240_22
- Abdelrahman T.N., Abdelhameed G.A., Armanious S.H. Evaluation of real-time tracheal ultrasound versus colorimetric capnography as a point of care tool for confirmation of endotracheal intubation: A randomized controlled study. Ain-Shams J. Anesthesiol. 2020; 12: 66. DOI: 10.1186/s42077-020-00117-3
- Chou H.C., Chong K.M., Sim S.S., et al. Real-time tracheal ultrasonography for confirmation of endotracheal tube placement during cardiopulmonary resuscitation. Resuscitation. 2013; 84: 1708–12. DOI: 10.1016/j.resuscitation.2013.06.018
- Sahu A.K., Bhoi S., Aggarwal P., et al. Endotracheal Tube Placement Confirmation by Ultrasonography: A Systematic Review and Meta-Analysis of more than 2500 Patients. J. Emerg. Med. 2020; 59: 254–64. DOI: 10.1016/j.jemermed.2020.04.040
- Tharapoom S., Wattanathum A. Evaluation of the rapid airway assessment ultrasound protocol for confirming endotracheal intubation. European Respiratory Journal 2024 64 (suppl 68): PA3446; DOI: 10.1183/13993003.congress-2024.PA3446
- Gottlieb M., Burns K., Holladay D., et al. Impact of endotracheal tube twisting on the diagnostic accuracy of ultrasound for intubation confirmation. Am. J. Emerg. Med. 2020; 38: 1332–4. DOI: 10.1016/j.ajem.2019.10.032
- Sim S.S., Lien W.C., Chou H.C., et al. Ultrasonographic lung sliding sign in confirming proper endotracheal intubation during emergency intubation. Resuscitation. 2012;83:307–312. DOI: 10.1016/j.resuscitation.2011.11.010
- Mousavi S.M., Sayyari Doughabadi M., Alamdaran S.A., et al. Diagnostic Accuracy of Suprasternal Versus Subxiphoid Ultrasonography for Endotracheal Intubation. Anesth. Pain Med. 2022; 12: e118592. DOI: 10.5812/aapm.118592
- Chou H.C., Tseng W.P., Wang C.H., et al. Tracheal rapid ultrasound exam (T.R.U.E.) for confirming endotracheal tube placement during emergency intubation. Resuscitation. 2011; 82: 1279–84. DOI: 10.1016/j.resuscitation.2011.05.016
- Pandit JJ, Young P, Davies M. Why does oesophageal intubation still go unrecognised? Lessons for prevention from the coroner's court. Anaesthesia. 2022; 77(2): 123–8. DOI: 10.1111/anae.15634
- Royal College of Anaesthetists. Capnography: no trace = wrong place. Available at: https://rcoa.ac.uk/safety-standards-quality/guidance-resources/capnography-no-trace-wrong-place Accessed: 17/02/2022)
- Waters E., Ruscitto A., Rodney G. PUMA guideline for preventing unrecognised oesophageal intubation. Anaesthesia. 2023; 78(1): 127. DOI: 10.1111/anae.15871
- Chrimes N., Higgs A., Cook T. Clinical examination may increase but not decrease suspicion of oesophageal intubation. Anaesthesia. 2023; 78(1): 128–9. DOI: 10.1111/anae.15887
- Fosse K., Salomonsen M., Gisvold S.E., et al. Can intubate, cannot ventilate: A proposed algorithm to handle problems with ventilation and oxygenation after intubation. Acta Anaesthesiol Scand. 2025; 69(3): e70007. DOI: 10.1111/aas.70007
- Popat M., Mitchell V., Dravid R., et al. Difficult Airway Society Guidelines for the management of tracheal extubation. Anaesthesia. 2012; 67(3): 318–40. DOI: 10.1111/j.1365-2044.2012.07075.x
- Kotak N., Mamde R., Desai P. Prospective randomized comparative trial of dexmedetomidine versus esmolol for attenuation of extubation response. Medical Journal of Dr DY Patil Vidyapeeth 2019; 12: 131.
- Clivio S., Putzu A., Tramèr M.R. Intravenous Lidocaine for the Prevention of Cough: Systematic Review and Meta-analysis of Randomized Controlled Trials. Anesth Analg. 2019; 129(5): 1249–55. DOI: 10.1213/ANE.0000000000003699
- Tung A., Fergusson N.A., Ng N., et al. Medications to reduce emergence coughing after general anaesthesia with tracheal intubation: a systematic review and network meta-analysis. Br J Anaesth 2020; S0007–0912(20)30012-X.
- Schnell D., Planquette B., Berger A., et al. Cuff Leak Test for the Diagnosis of Post-Extubation Stridor. J Intensive Care Med. 2017; 1:8 85066617700095. DOI: 10.1177/0885066617700095
- Schmidt U., Meier A. The Cuff Leak Test: A New Appraisal of an Old Technique. Who Benefits? Respir Care. 2023; 68(3): 442–3. DOI: 10.4187/respcare.10902
- Kallet R.H., Matsushima A., Yoo S., et al. Utilization of a Risk Stratification Tool and Volume-Based Cuff Leak Test to Assess Postextubation Stridor. Respir Care. 2023; 68(3): 309–19. DOI: 10.4187/respcare.10285
- Kuriyama A., Jackson J. L., & Kamei J. Performance of the cuff leak test in adults in predicting post-extubation airway complications: a systematic review and meta-analysis. Critical Care. 2020; 24(1): 640. DOI: 10.1186/s13054-020-03358-8
- Al-Husinat L., Jouryyeh B., Rawashdeh A., et al. The Role of Ultrasonography in the Process of Weaning from Mechanical Ventilation in Critically Ill Patients. Diagnostics (Basel). 2024; 14(4): 398. DOI: 10.3390/diagnostics14040398.
- Tsai W.W., Hung K.C., Huang Y.T., et al. Diagnostic efficacy of sonographic measurement of laryngeal air column width difference for predicting the risk of post-extubation stridor: A meta-analysis of observational studies. Front. Med. 2023; 10: 1109681. DOI: 10.3389/fmed.2023.1109681
- El-Baradey G.F., El-Shmaa N.S., Elsharawy F. Ultrasound-guided laryngeal air column width difference and the cuff leak volume in predicting the effectiveness of steroid therapy on postextubation stridor in adult. Are they useful? J. Crit. Care. 2016; 36: 272–6. DOI: 10.1016/j.jcrc.2016.07.007
- Loudermilk E.P., Hartmannsgruber M., Stoltzfus D.P., Langevin P.B. A prospective study of the safety of tracheal extubation using a pediatric airway exchange catheter for patients with a known difficult airway. Chest. 1997; 111(6): 1660–5. DOI: 10.1378/chest.111.6.1660. PMID: 9187190.
- Lu C., Li J., Zhao S., Zhang Y. Efficacy and safety of Cook staged Extubation Set in patients with difficult airway: a systematic review and meta-analysis. BMC Anesthesiol. 2023;23(1): 232. DOI: 10.1186/s12871-023-02191-0
- Chhabra S., Mohammed S. Difficult airway alert card: A good deed comes around. Indian J Anaesth. 2021; 65(10): 775. DOI: 10.4103/ija.ija_771_21
- April M.D., Schauer S.G., Nikolla D.A., et al. Association between multiple intubation attempts and complications during emergency department airway management: A national emergency airway registry study. Am J Emerg Med. 2024; 85: 202–7. DOI: 10.1016/j.ajem.2024.09.014
- Bailenson G., Turbin J., Berman R. Awake intubation--indications and technique. Anesth Prog. 1967; 14(10): 272–8.
- Chen F., Tan Z., He Q., et al. Guideline recommendations on the assessment and management of awake airway intubation: a systematic review. BMC Anesthesiol. 2025; 25(1): 79. DOI: 10.1186/s12871-025-02940-3
- Ahmad I., El-Boghdadly K., Bhagrath R.,et al. Difficult Airway Society guidelines for awake tracheal intubation (ATI) in adults. Anaesthesia. 2020; 75(4): 509–28. DOI: 10.1111/anae.14904

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