Correlation between arterial and end tidal carbon dioxide partial pressure during laparoscopic surgeries
Journal Title: Medpulse International Journal of Anesthesiology - Year 2019, Vol 9, Issue 1
Abstract
Background: End-tidal carbon dioxide pressure (etCO2) monitoring is used as an indirect measure of arterial carbon dioxide partial pressure (PaCO2). To prevent hypercapnia, close intraoperative monitoring of etCO2 or PaCO2 and appropriate ventilatory changes are necessary. Aim: To evaluate the correlation between arterial and end-tidal carbon dioxide during laparoscopic surgeries. Material and Methods: A total of 40 non-obese adult patients of either sex, between 18 to 60 years of age and ASA status I, posted for elective laparoscopic surgery were included. Measurement and comparison done between preinsufflation values of etCO2, a-etCO2 gradient and their respective predesufflation values. Results: In present study, a-etCO2 gradient increased with pneumoperitoneum to 7.58±2.11 mmHg at predesufflation period as compared to 5.55±2.07 mmHg at preinsufflation period and this change of 2.03±1.35 mmHg was found to be highly significant (p<0.001). We observed change in a-etCO2 gradient to be more in Trendelenburg position (2.20±1.51 mmHg) as compared to antitrendelenburg position (1.82±1.15 mmHg); however, this difference is not significant statistically. Change in a-etCO2 gradient has highly significant, positive correlation with duration of pneumoperitoneum (p< 0.001). Conclusion: Increase in a-etCO2 gradient with pneumoperitoneum indicating loss of correlation between etCO2 and PaCO2 during pneumoperitoneum and thus etCO2 is less accurate in reflecting PaCO2.
Authors and Affiliations
Upendra M Kanzarkar, Anjali Savargaonkar
Keywords
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- EP ID EP440227
- DOI 10.26611/1015914
- Views 197
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