Comparison of five methods in predicting difficult laryngoscopy: Neck circumference, neck circumference to thyromental distance ratio, the ratio of height to thyromental distance, upper lip bite test and Mallampati test

A Comparison between Modified Mallampati Test, Thyromental Distance, Upper Lip Bite Test and Neck Circumference for Predicting Difficult Intubation

Background: Various bedside screening tests are employed for the prediction of difficult intubation. In this study, we compared 4 bedside tests viz. the Modified Mallampati Test (MMT), the Thyromental Distance (TMD) measurement, the Upper Lip Bite Test (ULBT) and the Neck Circumference (NC) measurement in terms of Sensitivity, Specificity, Positive Predictive Value and Negative Predictive Value...

Neck circumference to thyromental distance ratio: a new predictor of difficult intubation in obese patients.

BACKGROUND This study was performed to assess whether intubation is more difficult in obese patients and to assess the ability of a new index: the ratio of the neck circumference to thyromental distance (NC/TM), to predict difficult intubation in obese patients. METHODS The incidence of difficult tracheal intubation in 123 obese (BMI≥27.5 kg m(-2)) and 125 non-obese patients was compared. Dif...

Comparison Upper Lip Bite Test and Mallampati Test in the Prediction of Difficult Laryngoscopy

Background and Objective: Intubation is the most common method for the management of the upper airway in general anesthesia. In this regard, the prediction of the ease or difficulty of intubation is of paramount importance for the anesthesia team. The main cause of anesthesia-related mortality is failed airway management. The present study aimed to compare the accuracy of the upper lip bite (UL...

Comparison of Upper Lip Bite Test and Ratio of Height to Thyromental Distance with Other Airway Assessment Tests for Predicting Difficult Endotracheal Intubation

Modified Mallampati test and thyromental distance as a predictor of difficult laryngoscopy in Thai patients.

BACKGROUND Preoperative evaluation of anatomical landmarks and clinical factors are important in the detection of patients at risk for difficult laryngoscopy. The modified Mallampati test (MMT) and thyromental distance (TMD) are commonly used for this purpose but there are controversies regarding their accuracy. OBJECTIVE The objective of the present study was to evaluate the accuracy of MMT ...