Short-term graft patency of sequential and Y-graft in open heart surgery with transit time flow measurement.

AIM: In this prospective study, we aimed to compare flow characteristics and the short term patency of sequential and y-grafts by intraoperative transit time flow measurement. METHODS: Sixty patients were selected from 1374 isolated coronary bypass operations. Group 1 (N.=36) consisted of sequential grafted, Group 2 (N.=24) consisted of y-grafted patients. Intraoperative graft flow measurement was done with a transit time flow meter at stable hemodynamic conditions. We follow up the groups at the 30th day of the operation. RESULTS: The mean flows at measurement set up were 43.2±19.7 mL/min in Group 1 and 43.6±21.7 mL/min in Group 2. After distal graft clamp removal the same values were 63.4±20.9 mL/min in Group 1 and 67.3±35.3 ml/mins in Group 2. At the 30th day of the operation no patients died, and none of them had an acute myocardial infarction. CONCLUSION: The percent of flow increase in sequential graft group was higher but the difference of the percent of flow increase between groups was not statistically significant.

Comparison of the effects of pulsatile cardiopulmonary bypass, non-pulsatile cardiopulmonary bypass and off-pump coronary artery bypass grafting on the respiratory system and serum carbonyl.

BACKGROUND: We aimed to investigate the effects of off-pump coronary artery bypass grafting (CABG), pulsatile cardiopulmonary bypass (CPB), and non-pulsatile CPB techniques on oxidative stress and the respiratory system in the current study. MATERIALS AND METHODS: The patients were allocated into three different groups according to perfusion techniques, as follows: off-pump CABG group (n=10); pulsatile CPB (n=11); and non-pulsatile CPB group (n=11). Serum carbonyl level was measured and a pulmonary function test was performed preoperatively and postoperatively. RESULTS: The postoperative increase in the carbonyl level was significantly lower in the off-pump CABG group compared to the other two groups, while there was no significant difference between the pulsatile and non-pulsatile CPB groups with respect to carbonyl levels. Arterial partial pressure of oxygen, forced expiratory volume in one second, and forced vital capacity were significantly higher in the off-pump CABG group compared to other two groups in the postoperative period. CONCLUSION: We found that off-pump CABG had less negative effects on oxidative stress and the respiratory system compared to pulsatile CPB and non-pulsatile CPB techniques. Additionally, there was no significant difference between pulsatile and non-pulsatile CPB.