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Ratio of height to thyromental distance: a comparison with mallampati and upper lip bite test for predicting difficult intubation in Pakistani population.
J Pak Med Assoc. 2021 Jun; 71(6):1570-1574.JP

Abstract

OBJECTIVE

To compare the accuracy of three diagnostic tests in predicting difficult laryngoscopy using Cormack and Lehane grade as the gold standard.

METHODS

The cross-sectional study was conducted at the Aga Khan University Hospital, Karachi, from August 2014 to August 2015, and comprised patients who required endotracheal intubation for elective surgical procedures. The primary investigator used ratio of height to thyromental distance, upper lip bite test and the modified Mallampati test for assessing the airway correlated with laryngoscopic view based on Cormack and Lehane grading. Data was analysed using SPSS 19.

RESULTS

Of the 383 patients, 59(15.4%) were classified as difficult cases of laryngoscopy. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of ratio of height to thyromental distance were 84.7%, 90.1%, 60.9%, 97%, 89.3%; and those the corresponding values for the upper lip bite test were 83.1%, 89.2%, 58.3%, 96.7% and 88.3%. The values for the modified Mallampati test were 30.5%, 84.3%, 26.1%, 86.9% and 79.9% respectively. The area under receiver-operating characteristic curve for the first two tests was significantly more than for the modified Mallampati test (p<0.01).

CONCLUSIONS

RHTMD and ULBT both are acceptable alternatives for prediction of difficult laryngoscopy as a simple, single bed-side test.

Authors+Show Affiliations

Department of Anaesthesiology, Aga Khan University Hospital, Karachi, Pakistan.Department of Anaesthesiology, Aga Khan University Hospital, Karachi, Pakistan.Department of Anaesthesiology, Aga Khan University Hospital, Karachi, Pakistan.Departments of Anaesthesiology,Aga Khan University Hospital, Karachi.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

34111074

Citation

Ali, Saman Tauheed, et al. "Ratio of Height to Thyromental Distance: a Comparison With Mallampati and Upper Lip Bite Test for Predicting Difficult Intubation in Pakistani Population." JPMA. the Journal of the Pakistan Medical Association, vol. 71, no. 6, 2021, pp. 1570-1574.
Ali ST, Samad K, Raza SA, et al. Ratio of height to thyromental distance: a comparison with mallampati and upper lip bite test for predicting difficult intubation in Pakistani population. J Pak Med Assoc. 2021;71(6):1570-1574.
Ali, S. T., Samad, K., Raza, S. A., & Hoda, M. Q. (2021). Ratio of height to thyromental distance: a comparison with mallampati and upper lip bite test for predicting difficult intubation in Pakistani population. JPMA. the Journal of the Pakistan Medical Association, 71(6), 1570-1574. https://doi.org/10.47391/JPMA.1215
Ali ST, et al. Ratio of Height to Thyromental Distance: a Comparison With Mallampati and Upper Lip Bite Test for Predicting Difficult Intubation in Pakistani Population. J Pak Med Assoc. 2021;71(6):1570-1574. PubMed PMID: 34111074.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ratio of height to thyromental distance: a comparison with mallampati and upper lip bite test for predicting difficult intubation in Pakistani population. AU - Ali,Saman Tauheed, AU - Samad,Khalid, AU - Raza,Syed Amir, AU - Hoda,Muhammad Qamarul, PY - 2021/6/10/entrez PY - 2021/6/11/pubmed PY - 2021/6/11/medline KW - Ratio of height to thyromental distance, Upper lip bite test, Mallampati, Difficult laryngoscopy. SP - 1570 EP - 1574 JF - JPMA. The Journal of the Pakistan Medical Association JO - J Pak Med Assoc VL - 71 IS - 6 N2 - OBJECTIVE: To compare the accuracy of three diagnostic tests in predicting difficult laryngoscopy using Cormack and Lehane grade as the gold standard. METHODS: The cross-sectional study was conducted at the Aga Khan University Hospital, Karachi, from August 2014 to August 2015, and comprised patients who required endotracheal intubation for elective surgical procedures. The primary investigator used ratio of height to thyromental distance, upper lip bite test and the modified Mallampati test for assessing the airway correlated with laryngoscopic view based on Cormack and Lehane grading. Data was analysed using SPSS 19. RESULTS: Of the 383 patients, 59(15.4%) were classified as difficult cases of laryngoscopy. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of ratio of height to thyromental distance were 84.7%, 90.1%, 60.9%, 97%, 89.3%; and those the corresponding values for the upper lip bite test were 83.1%, 89.2%, 58.3%, 96.7% and 88.3%. The values for the modified Mallampati test were 30.5%, 84.3%, 26.1%, 86.9% and 79.9% respectively. The area under receiver-operating characteristic curve for the first two tests was significantly more than for the modified Mallampati test (p<0.01). CONCLUSIONS: RHTMD and ULBT both are acceptable alternatives for prediction of difficult laryngoscopy as a simple, single bed-side test. SN - 0030-9982 UR - https://www.unboundmedicine.com/medline/citation/34111074/Ratio_of_height_to_thyromental_distance:_a_comparison_with_mallampati_and_upper_lip_bite_test_for_predicting_difficult_intubation_in_Pakistani_population_ L2 - http://jpma.org.pk/full_article-text.php?article_id=10704 DB - PRIME DP - Unbound Medicine ER -