[The analysis of renal function in off-pump coronary artery bypass grafting]

OPCAB (off-pump coronary artery bypass grafting) is useful for preventing post-operative neurologic complications. On the other hand, the effect of OPCAB on post-operative renal function is still unclear. We analyzed the post-operative renal function in 39 patients. Thirty-two patients had normal pre-operative renal function (CRE < or = 1.4 mg/dl). Thirty-one patients were doing well in terms of post-operative renal function. Only 1 patient needed hemodialysis (HD) because of systemic infection in early post-operative period. Another 7 patients had pre-operative renal dysfunction (CRE > or = 1.5 mg/dl). Three cases with high-grade pre-operative renal dysfunction (CRE > 3.0 mg/dl and CCR < 20 ml/min) needed temporary HD or continuous hemo-diafiltration (CHDF) in early post-operative period, and then they needed maintenance HD for the treatment of chronic renal failure within 3 weeks after OPCAB. Three of 4 cases with low-grade pre-operative renal dysfunction (CRE: 1.9-2.7 mg/dl and CCR: 22-42 ml/min) needed temporary HD or CHDF in early post-operative period. These 3 patients were relieved of the early post-operative renal failure, but required maintenance HD in the late periods. In summary, OPCAB could not prevent the development of acute renal failure in the patients with pre-operative renal dysfunction.