Impact of cardiopulmonary bypass management on postcardiac surgery renal function

被引:95
作者
Fischer, UM
Weissenberger, WK
Warters, RD
Geissler, HJ
Allen, SJ
Mehlhorn, U
机构
[1] Univ Cologne, Clin Cardiothorac Surg, D-50924 Cologne, Germany
[2] Univ Texas, Sch Med, Dept Anesthesiol, Houston, TX USA
来源
PERFUSION-UK | 2002年 / 17卷 / 06期
关键词
D O I
10.1191/0267659102pf610oa
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective: Cardiac surgery on cardiopulmonary bypass (CPB) is associated with postoperative renal dysfunction and up to 4% of patients with normal preoperative renal function develop acute renal failure (ARF) requiring dialysis. According to recent investigations, CPB management is not evidence-based and, thus, current clinical CPB practice may favor renal dysfunction. The purpose of our study was to investigate if postcardiac surgery renal dysfunction is influenced by CPB management. Methods: We selected three groups of patients with normal preoperative renal function who had been subjected to cardiac surgical procedures on CPB: 44 patients with postoperative ARF requiring hemofiltration/dialysis (ARF group), 51 patients with postoperative renal dysfunction not requiring hemofiltration/dialysis (serum creatinine increase > 0.5 mg/dl within 48 h postsurgery: CREA group), and 48 patients with normal postoperative renal function (Control group). The patients' on-line CPB records were analyzed for CPB duration, CPB perfusion pressure, CPB flow, and periods on CPB at a perfusion pressure <60 mmHg. On-CPB diuretic and vasoconstrictor medication was recorded. Results: Patient demographics were similar for the three groups. In the ARF group, CPB duration was longer (166 +/- 77 [standard deviation, SD] min) compared to CREA (115 +/- 41 min; p < 0.001) and to Control groups (107 40 min; p < 0.001), and mean CPB flow was lower (2.35 +/- 0.36 l/min/m(2)) compared to CREA (2.61 +/- 0.35 l/min/m(2); p = 0.0015) and to Control groups (2.51 +/- 0.33 l/min/m(2); p = 0.09). Mean arterial pressure on CPB (ARF: 61 10; CREA: 60 7; Control: 63 +/- 9 mmHg; p = 0.19) as well as furosemide and norepinephrine medication on CPB were similar for the groups. Compared to Control (46 26 min), CPB duration at arterial pressures < 60 mmHg was longer in ARF (78 60 min; p = 0.034) and in CREA (62 +/- 36 min; p = 0.048). Conclusions: Our data suggest that current clinical CPB management impacts postoperative renal function. We found that patients with normal preoperative renal function who developed postoperative ARF had longer CPB duration, lower CPB perfusion flow, and longer periods on CPB at pressures < 60 mmHg compared to patients with no post CPB ARE However, our data do not allow us to separate these CPB-related factors from the potential influence of perioperative low cardiac output syndrome as a cause for postoperative ARK Thus, future clinical studies are required to elucidate CPB-induced ARF and to optimize CPB management for ARF prevention.
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收藏
页码:401 / 406
页数:6
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