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Predictive value of upper lip bite test and ratio of height to thyromental distance compared to other multivariate airway assessment tests for difficult laryngoscopy in apparently normal patients.
J Anaesthesiol Clin Pharmacol. 2013 Apr; 29(2):191-5.JA

Abstract

BACKGROUND

Various anatomical measurements and non-invasive clinical tests, singly or in various combinations can be performed to predict difficult intubation. Recently introduced "Upper lip bite test" (ULBT) and "Ratio of height to Thyromental distance" (RHTMD) are claimed to have high predictability. We conducted a study to compare the Predictive Value of ULBT and RHTMD with Mouth opening (Inter-Incisor gap) (IIG), Modified Mallampatti Test (MMT), Head and neck movement (HNM) and Thyromental Distance (TMD) for Difficult Laryngoscopy.

MATERIALS AND METHODS

In this prospective, single blinded observational study, 480 adult patients of either sex, ASA grade I and II were assessed and graded for ULBT, RHTMD, TMD, MMT, IIG, and HNM according to standard methods and correlated with the Cormack and Lehane grade.

RESULTS

ULBT and RHTMD had highest sensitivity, specificity, positive predictive value, negative predictive value, likelihood ratio, i.e., 74.63%, 91.53%, 58.82%, 95.7%, 31.765 and 71.64%, 92.01%, 59.26%, 95.24%, 8.96 respectively, compared to TMD, MMT, IIG and HNM.

CONCLUSIONS

ULBT is the best predictive test for difficult laryngoscopy in apparently normal patients but RHTMD can also be used as an acceptable alternative.

Authors+Show Affiliations

Department of Anesthesiology and Critical Care, Pt. J. N. M. Medical College, Raipur, Chhattisgarh, India.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23878440

Citation

Shah, Pratibha Jain, et al. "Predictive Value of Upper Lip Bite Test and Ratio of Height to Thyromental Distance Compared to Other Multivariate Airway Assessment Tests for Difficult Laryngoscopy in Apparently Normal Patients." Journal of Anaesthesiology, Clinical Pharmacology, vol. 29, no. 2, 2013, pp. 191-5.
Shah PJ, Dubey KP, Yadav JP. Predictive value of upper lip bite test and ratio of height to thyromental distance compared to other multivariate airway assessment tests for difficult laryngoscopy in apparently normal patients. J Anaesthesiol Clin Pharmacol. 2013;29(2):191-5.
Shah, P. J., Dubey, K. P., & Yadav, J. P. (2013). Predictive value of upper lip bite test and ratio of height to thyromental distance compared to other multivariate airway assessment tests for difficult laryngoscopy in apparently normal patients. Journal of Anaesthesiology, Clinical Pharmacology, 29(2), 191-5. https://doi.org/10.4103/0970-9185.111700
Shah PJ, Dubey KP, Yadav JP. Predictive Value of Upper Lip Bite Test and Ratio of Height to Thyromental Distance Compared to Other Multivariate Airway Assessment Tests for Difficult Laryngoscopy in Apparently Normal Patients. J Anaesthesiol Clin Pharmacol. 2013;29(2):191-5. PubMed PMID: 23878440.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Predictive value of upper lip bite test and ratio of height to thyromental distance compared to other multivariate airway assessment tests for difficult laryngoscopy in apparently normal patients. AU - Shah,Pratibha Jain, AU - Dubey,Kamta Prasad, AU - Yadav,Jai Prakash, PY - 2013/7/24/entrez PY - 2013/7/24/pubmed PY - 2013/7/24/medline KW - Airway assessment tests KW - difficult laryngoscopy KW - ratio of height to thyromental distance KW - upper lip bite test SP - 191 EP - 5 JF - Journal of anaesthesiology, clinical pharmacology JO - J Anaesthesiol Clin Pharmacol VL - 29 IS - 2 N2 - BACKGROUND: Various anatomical measurements and non-invasive clinical tests, singly or in various combinations can be performed to predict difficult intubation. Recently introduced "Upper lip bite test" (ULBT) and "Ratio of height to Thyromental distance" (RHTMD) are claimed to have high predictability. We conducted a study to compare the Predictive Value of ULBT and RHTMD with Mouth opening (Inter-Incisor gap) (IIG), Modified Mallampatti Test (MMT), Head and neck movement (HNM) and Thyromental Distance (TMD) for Difficult Laryngoscopy. MATERIALS AND METHODS: In this prospective, single blinded observational study, 480 adult patients of either sex, ASA grade I and II were assessed and graded for ULBT, RHTMD, TMD, MMT, IIG, and HNM according to standard methods and correlated with the Cormack and Lehane grade. RESULTS: ULBT and RHTMD had highest sensitivity, specificity, positive predictive value, negative predictive value, likelihood ratio, i.e., 74.63%, 91.53%, 58.82%, 95.7%, 31.765 and 71.64%, 92.01%, 59.26%, 95.24%, 8.96 respectively, compared to TMD, MMT, IIG and HNM. CONCLUSIONS: ULBT is the best predictive test for difficult laryngoscopy in apparently normal patients but RHTMD can also be used as an acceptable alternative. SN - 0970-9185 UR - https://www.unboundmedicine.com/medline/citation/23878440/Predictive_value_of_upper_lip_bite_test_and_ratio_of_height_to_thyromental_distance_compared_to_other_multivariate_airway_assessment_tests_for_difficult_laryngoscopy_in_apparently_normal_patients_ L2 - http://www.joacp.org/article.asp?issn=0970-9185;year=2013;volume=29;issue=2;spage=191;epage=195;aulast=Shah DB - PRIME DP - Unbound Medicine ER -
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