Comparison of Predictive Value of Upper Lip Bite Test Ratio of Height to Thyromental Distance and Mallampati Classification for the Anticipation of Difficult Intubation in Apparently Normal Patients

JOURNAL TITLE: Journal of Research & Innovation in Anesthesia

Author
1. Swasthika Vondivillu
2. Varsha Himanshu Vyas
3. Sarika Wadhwa
4. Yaggati Prathyusha
5. Jayshree Prakash Vaswani
ISSN
DOI
10.5005/jp-journals-10049-2013
Volume
7
Issue
2
Publishing Year
2022
Pages
5
Author Affiliations
    1. Department of Anesthesia, D Y Patil Hospital, Navi Mumbai, Maharashtra, India
    1. Department of Anesthesia and Critical Care, Malkhan Singh District Hospital, Aligarh, Uttar Pradesh, India
    1. Department of Anesthesia, D Y Patil Hospital, Navi Mumbai, Maharashtra, India
    1. Department of Anesthesia, D Y Patil Hospital, Navi Mumbai, Maharashtra, India
    1. Department of Anesthesia, D Y Patil Deemed to be University, Navi Mumbai, Maharashtra, India
  • Article keywords
    Mallampati, Ratio of height to thyromental distance, Top lip bite test, Tracheal intubation

    Abstract

    Objective: To analyze the positive predictive value (PPV) and negative predictive value (NPV) of upper lip bite test (ULBT), ratio of patient\'s height to thyromental distance (RHTMD), and Mallampati classification (MPC) anticipating difficult intubation. Materials and methods: Adults undergoing elective intubation procedures under general anesthesia were graded using MPC, ULBT, and RHTMD in this prospective study. Cormack and Lehane (CL) were compared to three approaches. Grades III and IV are believed to be the most challenging to intubate. Calculations were made to determine each method\'s sensitivity, specificity, PPV, and NPV, as well as accuracy. Results: Out of 60 patients, 18 (30%), 21 (35%), and 21 (35%) were from CL grade I, grade II, and grade III, respectively. ULBT was found to be the least useful test to predict difficult intubation with 0% sensitivity. MPC and RHTMD had a sensitivity of 61.9% and 95.2%, respectively. Conclusion: In assessing and preparing for anticipating a problematic endotracheal intubation airway, RHTMD as a single preoperative bedside test offers a high level of accuracy when compared to MPC and ULBT.

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