Validation of Thyromental Height test (TMHT) as a predictor of difficult laryngoscope in obstetric patients: a cross-sectional study

The Thyromental Height Test (TMHT) is a relatively new pre-operative airway assessment parameter that does not require neck extension and can be done in a neutral position of the head. It has been proven effective in predicting the possibility of difficult laryngoscopy in patients presenting for general anesthesia with less literature available for obstetric population. Hence the primary goal of this study is to assess the accuracy of TMHT for prediction of difficult laryngoscopy in obstetric population. The sample size was calculated using prevelance of difficult laryngoscopy based on study by Sadeh et al., (2025). At 2 tail alternative hypothesis and level of significance at 5%, the minimum sample size came out to be 128 for the current study. However, due to constraint of time, a minimum of 40 patients will be included in the study for the thesis.