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Background: Either suprarenal or infrarenal aortic clamping markedly reduces renal blood flow. This aortic clamping may cause postoperative acute kidney injury(AKI)., Methods: Fifty-four patients undergoing open abdominal aortic aneurysm (AAA) surgery were included in a retrospective study. Postoperative AKI defined as an absolute increase in serum creatinine (Cre) of more than or equal to 0.3 mg x dl(-1) or an increase in Cre of more than or equal to 50% within 48 hours after the end of the procedure., Results: Thirteen patients developed AKI, but none of them required dialysis. The patients with AKI had higher preoperative Cre, longer operation, longer clamp time and more use of diuretics intra- and postoperatively., Conclusions: AKI occurred in 24.1% of patients undergoing AAA surgery. Risk factors for AKI were preoperative Cre, operation time, clamp time and use of diuretics.

Background: Intraoperative use of remifentanil requires much more analgesics postoperatively. Moreover, remifentanil causes intraoperative hypotension and bradycardia., Methods: The objectives are to compare intra- and post-operative drug cost between patients who received remifentanil (Group R, n = 72) and those who received fentanyl (Group F, n = 66) during laparoscopic cholecystectomy retrospectively., Results: The baseline demographics were similar between the two groups. Intraoperative drug costs were 7,782 +/- 1,579 yen in Group R and 6,235 +/- 1,037 yen in Group E Postoperative drug costs were 364 +/- 521 yen in Group R and 146 +/- 153 yen in Group E Total drug costs were 8,167 +/- 1,607 yen in Group R and 6,381 +/- 1,042 yen in Group E These reached statistical significance (P < 0.01). Length of hospital stay (days) between the two groups were comparable., Conclusions: Remifentanil anesthesia requires much more intra- and post-operative drug cost than fentanyl anesthesia for laparoscopic cholecystectomy.