Mallampati Airway Assessment Test in Upright and Supine Positions with and without Noisy Exhalation in the Prediction of Difficult Mask Ventilation
|Zahid Hussain Khan1*, Ali Mohammad Khorasani1 and Mir Saeed Yekaninejad3|
|1Department of Anesthesiology and Intensive Care, Imam Khomeini Medical Center, Tehran University of Medical Sciences, Tehran, Iran|
|2Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran|
|*Corresponding Author :||Zahid Hussain Khan
Department of Anesthesiology and Intensive Care
Imam Khomeini Medical Center, Keshavarz BLVD
Tehran University of Medical Sciences
Tehran 1419733141, Iran
E-mail: [email protected]
|Received January 19, 2013; Accepted March 20, 2013; Published March 27, 2013|
|Citation: Khan ZH, Khorasani AM, Yekaninejad MS (2013) Mallampati Airway Assessment Test in Upright and Supine Positions with and without Noisy Exhalation in the Prediction of Difficult Mask Ventilation. Intern Med 3:122. doi: 10.4172/2165-8048.1000122|
|Copyright: © 2013 Khan ZH, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.|
Background: Difficult mask ventilation is an emergency situation. In this study we pursued the effect of phonation and that of patient’s position on the Mallampati class, and its accuracy in the prediction of difficult mask ventilation.
Methods: Six hundred sixty one patients with or without phonation were examined, in both supine and upright positions. The results of the four different situations were evaluated for the prediction of difficult mask ventilation. For each of the four situations, sensitivity, specificity, positive and negative predictive values were obtained.
Results: In this study, 246 (37.2%) patients had difficult mask ventilation. The sensitivity of the Mallampati classification in four positions did not show a significant difference but the specificity was found to be the highest in the supine position with phonation. The negative predictive value was observed to be 95% in the supine position plus phonation, and the positive predictive value also had the highest percentage in the same situation.
Conclusions: The highest correlation was seen in the supine position without phonation and difficult mask ventilation. Phonation improved the Mallampati class better in the supine position than in the upright position.