Background: Physicians are always wanted to be performed exact medical tests in non-invasive ways. During cardiac surgery after the onset of cardiopulmonary bypass, the patient's ventilation along with the patient's heart rate is stopped, and the task of the two vital organs is transferred to the pulmonary heart system, which acts to ensure the patient's ventilation at defined intervals in the patient's arterial gas analysis. The Objective of this study was to determine the relationship between paCO2 and PECO2 in CPB.
Methodology: This cross-sectional study has been done on 30 patients who are candidates for CABG without other illness. Demographic data such as age, gender, history of previous illnesses, drug use and education were completed by a checklist. Arterial blood samples were taken from these patients and the result was reported through the ABG device in the operating room. The paCO2 was compared with PEco2. Data were analyzed by statistical methods in SPSS version 22.
Results: Of all patients, 17(56.67%) were male and 13 (43.33%) were female. The mean age of patients was 60 ±11 years with age range of 35-78 years. The mean of paco2 was 36.5 ±4.13 mmHg and peco2 was 31 ± 6.4 mmHg. According to the results in the study, FGF (Fresh Gas Flow) was 1.9 ± 0.7. There was a positive and significant correlation between FGF and paCo2 and also between FGF and PECO2.
Conclusion: Results showed that there was a significant relationship between arterial PCO2 and PeCO2 during hypothermic CPB.
Key words: Carbon dioxide, Oxygenator, Cardio Pulmonary Bypass, arterial pressure