• Users Online: 481
  • Print this page
  • Email this page
ORIGINAL ARTICLE
Year : 2021  |  Volume : 4  |  Issue : 3  |  Page : 185-190

Evaluation of upper lip bite test and thyromental height test for prediction of difficult laryngoscopy: A prospective observational study


Department of Anaesthesiology, Kokilaben Dhirubhai Ambani Hospital and Research Centre, Mumbai, Maharashtra, India

Correspondence Address:
Dr. Aparna Date
Department of Anaesthesiology, Kokilaben Dhirubhai Ambani Hospital and Research Centre, Four Bungalows, Andheri (West), Mumbai - 400 053, Maharashtra
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/arwy.arwy_48_21

Rights and Permissions

Background and Aims: Unanticipated difficult laryngoscopy (DL) can cause life-threatening complications in the operation theatre, intensive care unit and emergency department. Various screening tests have been developed to predict DL. While modified Mallampati test (MMT) is the most commonly used one, it has poor sensitivity. Upper lip bite test (ULBT) and thyromental height test (TMHT) have been shown to be more reliable in predicting DL. The aim of this study was to compare the three tests and evaluate whether a combination of ULBT and TMHT would show better accuracy in predicting DL. Patients and Methods: A total of 109 adult patients undergoing elective surgery under general anaesthesia with endotracheal intubation were assessed using the MMT, ULBT and TMHT before surgery. The required sample size for the study was calculated using the Fisher Z test. The three tests, and a combination of ULBT with TMHT, were compared for their sensitivity, specificity, positive predictive value, negative predictive value and accuracy in predicting DL. Results: The accuracy of MMT, ULBT, TMHT and ULBT + TMHT in predicting DL was found to be 81.65%, 86.23%, 97.24% and 95.41%, respectively. MMT exhibited the lowest sensitivity and had the highest number of false negatives. TMHT exhibited the best accuracy and sensitivity, with the lowest number of false negatives. A combination of ULBT and TMHT did not improve the PPV in the sample tested. Conclusion: TMHT was found to be the best test for predicting DL, and its combination with ULBT did not improve the accuracy.


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed842    
    Printed17    
    Emailed0    
    PDF Downloaded53    
    Comments [Add]    

Recommend this journal