A consecutive sample of 500 adults undergoing cardiac surgery was randomly allocated to extracorporeal circulation with either a Bard bubble oxygenator H1700 or a Bard membrane oxygenator HF5700 (Bard Ltd. Crawley, UK). Alveolar-arterial oxygen tension gradient (AaDOJ was calcu- lated prebypass, then 20,90, 180, and 420 minutes postby- pass. Preoperative, initial postoperative, and first-day post- operative chest x-rays were assigned an extravascular lung water (EVLW) score and an atelectasis score. There was a comparable increase in AaDO after bypass in each group. The increase in EVLW score was significantly greater in the bubble group (mean 2.91, 95% Cl 2.28-3.54) than the mem- brane group (mean 2.06, 95% Cl 1.43-2.89) for the initial postoperative x-rays (P < 0.01) and also for the x-rays on the first postoperative day (P < 0.01). The increase in atelectasis score was significantly greater in the bubble group (mean 1.08,95% Cl 0.94-1.18) than the membrane group (mean 0.86, 95% Cl 0.74-0.98) for the initial postoperative x-rays (P c 0.01) but not for the x-rays on the first postoperative day. There was no difference in duration of ventilation, intensive care, hospital stay, or hospital mortality between bubble and membrane groups. Although there was a statistically signifi- cant difference in x-ray scores between oxygenator groups, neither intrapulmonary shunting nor clinical outcome was influenced by the type of oxygenator used during bypass.
Mendeley saves you time finding and organizing research
There are no full text links
Choose a citation style from the tabs below