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Comparison of Upper Lip Bite Test and Ratio of Height to Thyromental Distance with Other Airway Assessment Tests for Predicting Difficult Endotracheal Intubation.
Anesth Essays Res. 2018 Jan-Mar; 12(1):124-129.AE

Abstract

Background and Aims

Unanticipated difficult intubation or the failed intubation in operating room and in emergency department is an imperative source of anesthesia-related patient's mortality. The aim of this study is to compare the predictive value of upper lip bite test (ULBT) and ratio of height to thyromental distance (RHTMD) with other commonly used preoperative airway assessment tests for predicting difficult intubation in Indian population.

Materials and Methods

In this prospective, single-blinded observational study, 260 adult patients of either sex, belonging to American Society of Anesthesiologists physical Status I and II undergoing elective surgical procedure under general anesthesia were included in the study. ULBT, RHTMD, inter-incisor gap, modified Mallampati grade, horizontal length of the mandible, head and neck movements, sternomental distance, and TMD were assessed preoperatively and correlated with Cormack and Lehane's grading during laryngoscopy under anesthesia. Statistical analysis was done by Chi-square and Fisher's exact test.

Results

ULBT and RHTMD had highest sensitivity (66.7% and 63.3%), specificity (99.1% and 89.6%), positive predictive value (90.9% and 44.2%), and negative predictive value (96.9% and 95.0%), respectively, when compared to other parameters in predicting difficult airway.

Conclusion

ULBT and RHTMD may be used as a simple bedside airway assessment tools for prediction of difficult intubation.

Authors+Show Affiliations

Department of Anesthesiology, Bengaluru Medical College and Research Institute, Bengaluru, Karnataka, India.Department of Anesthesiology, Bengaluru Medical College and Research Institute, Bengaluru, Karnataka, India.Department of Anesthesiology, Bengaluru Medical College and Research Institute, Bengaluru, Karnataka, India.Department of Anesthesiology, Bengaluru Medical College and Research Institute, Bengaluru, Karnataka, India.Department of Anesthesiology, Bengaluru Medical College and Research Institute, Bengaluru, Karnataka, India.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29628567

Citation

Shobha, D, et al. "Comparison of Upper Lip Bite Test and Ratio of Height to Thyromental Distance With Other Airway Assessment Tests for Predicting Difficult Endotracheal Intubation." Anesthesia, Essays and Researches, vol. 12, no. 1, 2018, pp. 124-129.
Shobha D, Adiga M, Rani DD, et al. Comparison of Upper Lip Bite Test and Ratio of Height to Thyromental Distance with Other Airway Assessment Tests for Predicting Difficult Endotracheal Intubation. Anesth Essays Res. 2018;12(1):124-129.
Shobha, D., Adiga, M., Rani, D. D., Kannan, S., & Nethra, S. S. (2018). Comparison of Upper Lip Bite Test and Ratio of Height to Thyromental Distance with Other Airway Assessment Tests for Predicting Difficult Endotracheal Intubation. Anesthesia, Essays and Researches, 12(1), 124-129. https://doi.org/10.4103/aer.AER_195_17
Shobha D, et al. Comparison of Upper Lip Bite Test and Ratio of Height to Thyromental Distance With Other Airway Assessment Tests for Predicting Difficult Endotracheal Intubation. Anesth Essays Res. 2018 Jan-Mar;12(1):124-129. PubMed PMID: 29628567.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of Upper Lip Bite Test and Ratio of Height to Thyromental Distance with Other Airway Assessment Tests for Predicting Difficult Endotracheal Intubation. AU - Shobha,D, AU - Adiga,Maitri, AU - Rani,D Devika, AU - Kannan,Sudheesh, AU - Nethra,S S, PY - 2018/4/10/entrez PY - 2018/4/10/pubmed PY - 2018/4/10/medline KW - Airway assessment test KW - difficult laryngoscopy KW - ratio of height to thyromental distance KW - upper lip bite test SP - 124 EP - 129 JF - Anesthesia, essays and researches JO - Anesth Essays Res VL - 12 IS - 1 N2 - Background and Aims: Unanticipated difficult intubation or the failed intubation in operating room and in emergency department is an imperative source of anesthesia-related patient's mortality. The aim of this study is to compare the predictive value of upper lip bite test (ULBT) and ratio of height to thyromental distance (RHTMD) with other commonly used preoperative airway assessment tests for predicting difficult intubation in Indian population. Materials and Methods: In this prospective, single-blinded observational study, 260 adult patients of either sex, belonging to American Society of Anesthesiologists physical Status I and II undergoing elective surgical procedure under general anesthesia were included in the study. ULBT, RHTMD, inter-incisor gap, modified Mallampati grade, horizontal length of the mandible, head and neck movements, sternomental distance, and TMD were assessed preoperatively and correlated with Cormack and Lehane's grading during laryngoscopy under anesthesia. Statistical analysis was done by Chi-square and Fisher's exact test. Results: ULBT and RHTMD had highest sensitivity (66.7% and 63.3%), specificity (99.1% and 89.6%), positive predictive value (90.9% and 44.2%), and negative predictive value (96.9% and 95.0%), respectively, when compared to other parameters in predicting difficult airway. Conclusion: ULBT and RHTMD may be used as a simple bedside airway assessment tools for prediction of difficult intubation. SN - 0259-1162 UR - https://www.unboundmedicine.com/medline/citation/29628567/Comparison_of_Upper_Lip_Bite_Test_and_Ratio_of_Height_to_Thyromental_Distance_with_Other_Airway_Assessment_Tests_for_Predicting_Difficult_Endotracheal_Intubation_ L2 - http://www.aeronline.org/article.asp?issn=0259-1162;year=2018;volume=12;issue=1;spage=124;epage=129;aulast=Shobha DB - PRIME DP - Unbound Medicine ER -
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