RESUMO
This clinical study is to compare the use of coaxial circle circuit with CO2 absorber and coaxial D circuit without CO2 absorber in 20 patients of physical status ASA class I and II. The mean age, body weight, and hemoglobin concentration are 40 ± 9.94 years old, 56.77 ± 7.33 kgs., 11.76 ± 1.22 gms/dl respectively. Fresh gas flow (FGF) and arterial blood gas was taken after stabilizing period of 15 – 30 minutes. Coxial D circuit without CO2 absorber was used secondly and arterial blood gas was taken in the same manner. The pH, PaCO2, PaO2 values were compared by paired T-test statistical analysis. It is concluded that at 6 lpm. Of FGF and minute ventilation, there is statistically significant difference (P