13. Role of modified Mallampati classification in predicting difficult laryngoscopy for endotracheal anesthesia in adults

Nguyen Toan Thang, Bui Ich Kim

Main Article Content

Abstract

Difficult airway control can lead to hypoxia, brain damage, and even death if not treated promptly. The modified Mallampati classification is commonly used to predict difficult laryngoscopy or intubation. A single-blind, prospective, descriptive study was conducted to evaluate the role of this classification in predicting difficult laryngoscopy (DL) in adults with indications for surgery under endotracheal anesthesia. Lehane-Cormack Grades 3–4 is considered a difficult DL. Results: The rate of DL was 8.2% (46/558). Mallampati categories I, II, III and IV had respective ratios of 47.6%; 37.5%; 13.8%; and 1.1%. Applying Mallampati classes III-IV to predict DL with sensitivity, specificity, positive predictive value, and negative predictive value were, 78.3%, 90.8%, 43.4%, and 97.9% respectively. Conclusion:  The modified Mallampati classification correctly predicted 78.3% of the DL cases, and only 43.4% of the difficultly predicted cases were accurate.

Article Details

References

1. Rosenblatt WH, Yanez ND. A Decision Tree Approach to Airway Management Pathways in the 2022 Difficult Airway Algorithm of the American Society of Anesthesiologists. Anesthesia and analgesia. 2022; 134(5): 910-915.
2. Roth D, Pace NL, Lee A, et al. Airway physical examination tests for detection of difficult airway management in apparently normal adult patients. The Cochrane database of systematic reviews. 2018; 5(5): Cd008874.
3. Joffe AM, Aziz MF, Posner KL, Duggan LV, Mincer SL, Domino KB. Management of Difficult Tracheal Intubation: A Closed Claims Analysis. Anesthesiology. 2019; 131(4): 818-829.
4. Prakash S, Kumar A, Bhandari S, Mullick P, Singh R, Gogia AR. Difficult laryngoscopy and intubation in the Indian population: An assessment of anatomical and clinical risk factors. Indian journal of anaesthesia. 2013; 57(6): 569-575.
5. Lundstrøm LH, Vester-Andersen M, Møller AM, Charuluxananan S, L’Hermite J, Wetterslev J. Poor prognostic value of the modified Mallampati score: a meta-analysis involving 177 088 patients. British journal of anaesthesia. 2011; 107(5): 659-667.
6. Mallampati SR, Gatt SP, Gugino LD, et al. A clinical sign to predict difficult tracheal intubation: a prospective study. Canadian Anaesthetists’ Society journal. 1985; 32(4): 429-434.
7. Samsoon GL, Young JR. Difficult tracheal intubation: a retrospective study. Anaesthesia. 1987;42(5):487-490.
8. Lee A, Fan LT, Gin T, Karmakar MK, Ngan Kee WD. A systematic review (meta-analysis) of the accuracy of the Mallampati tests to predict the difficult airway. Anesthesia and analgesia. 2006; 102(6): 1867-1878.
9. Yemam D, Melese E, Ashebir Z. Comparison of modified mallampati classification with Cormack and Lehane grading in predicting difficult laryngoscopy among elective surgical patients who took general anesthesia in Werabie comprehensive specialized hospital - Cross sectional study. Ethiopia, 2021. Annals of medicine and surgery (2012). 2022; 79: 103912.
10. Cormack RS, Lehane J. Difficult tracheal intubation in obstetrics. Anaesthesia. 1984; 39(11): 1105-1111.
11. Murugesan K, Arunachalam R, N. R. Correlative study between modified mallampati score with Cormack Lehane and POGO scoring. IAIM. 2018; 5(4): 119-125.
12. Ramapati S, Subrata R, Prithviraj C, Mukul K. Comparision of airway assessment by Mallampati classification and cormack and lehane grading in Indian population. Indian J Clin Anaesth. 2019; 6(1): 140-142.