ABSTRACT

To determine the relation between body mass index and resting end-tidal carbon dioxide partial pressure in individuals with normal physical status is the primary goal of the present study.

After obtaining written informed consents, the demographic data including age, gender, weight, height, body-mass index, and the American Society of Anesthesiologists score were recorded. In operating theatre, after 15 minutes of spontaneous ventilation in supine position wearing a modified face mask, the respiratory rate, and end-tidal carbon dioxide partial pressure measurements were obtained. The association between body-mass index, respiratory rate, and end-tidal carbon dioxide partial pressurewere analyzed using Pearson’s correlation (r).

A total of 56 patients were enrolled in the study. The Pearson correlation analysis showed no significance between body-mass index and end-tidal carbon dioxide partial pressure (r=0.148, p=0.275), respiratory rate (r=0.193, p=0.154), and end-tidal carbon dioxide partial pressure/respiratory rate (r=-0.079, p=0.565).

The present study showed that there was no relationship between body-mass index and end-tidal carbon dioxide partial pressure, end-tidal carbon dioxide partial pressure/respiratory rate or respiratory rate.