Objective:
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.
Material and Methods:
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).
Results:
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).
Conclusion:
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.
Keywords: carbon dioxide, body mass index, respiratory rate