Modified Mallampati Test, Thyromental Distance and Hyomental Distance for Accurately Predicting Difficult Visualization of the Larynx.
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Date
2015-10
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Abstract
Background: This study has been done to compare Hyomental distance with the modified Mallampati test, Thyromental
distance for accurately predicting difficult visualization of the larynx in apparently normal patients’. Methods: 198
apparently normal patients of > 18 years of age, with ASA 1 and 2, undergoing general anaesthesia with tracheal
intubation were evaluated. A hard-plastic bond ruler is used to measure the distance. After induction and paralysis using
glottic visualisation was assessed by using modified Cormach and Lehane classification with no external laryngeal
manipulation. Results: The highest sensitivity of 44.44 % was observed in predicting difficult visualization of the larynx
with modified Mallampati followed by TMD 11.11 % and HMD 11.11 % (2/18). Conclusion: An optimal combination of
tests that includes the HMD,MMT,TMD and other predictors and performing the tests in combination for predicting
Difficult Laryngoscopy, rather than using it alone.
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Keywords
Hyomental distance, larynx, Mallampati test, Thyromental distance
Citation
Vikas K N, Rani K Roopa. Modified Mallampati Test, Thyromental Distance and Hyomental Distance for Accurately Predicting Difficult Visualization of the Larynx. Annals of International Medical and Dental Research. 2015 Oct-Dec; 1(3): 157-160.