Concentration-response relationships for fentanyl and sufentanil in patients undergoing coronary artery bypass grafting

被引:68
作者
Thomson, IR [1 ]
Henderson, BT [1 ]
Singh, K [1 ]
Hudson, RJ [1 ]
机构
[1] Univ Manitoba, Dept Anesthesia, Winnipeg, MB, Canada
关键词
cardiac anesthesia; dose response; minimum alveolar concentration reduction;
D O I
10.1097/00000542-199810000-00009
中图分类号
R614 [麻醉学];
学科分类号
100217 ;
摘要
Background: Concentration-response relationships for sufentanil and fentanyl are undefined in patients undergoing coronary artery bypass grafting. Methods: Separate studies of sufentanil and fentanyl were performed in lorazepam-premedicated patients undergoing coronary artery bypass grafting, patients were assigned randomly to groups with different prebypass effect-site opioid concentrations targeted by computer-assisted infusion. The target sufentanil concentrations were 0.4 ng/ml (group L-S, n = 11), 0.8 ng/ml (group M-S, n = 10), and 1.2 ng/ml (group H-S, n = 11); the target fentanyl concentrations were 5 ng/ml (group L-F, n = 7), 10 ng/ml (group M-F, n = 7), and 15 ng/ml (group H-F, n = 6). propofol at a dose of 1 mg/kg was administered at induction of anesthesia and isoflurane was used for hemodynamic control. Hemodynamics, end-tidal isoflurane concentration, and opioid concentration in arterial blood were measured at specific intervals. Results: Intraoperative opioid concentrations were constant, averaging 0.71 +/- 0.13, 1.25 +/- 0.21, and 2.03 +/- 0.46 ng/ml for groups L-S, M-S, and H-S, respectively, and 7.3 +/- 1.1, 13.2 +/- 2.2, and 24.4 +/- 5.8 ng/ml for groups L-F, M-F, and H-F, respectively (all mean +/- SD). Isoflurane requirements were significantly greater in group L-S than in groups M-S and H-S and greater in group L-F than in groups M-F and H-F. The serum opioid and end-tidal isoflurane concentrations were correlated significantly. There were no intergroup differences in hemodynamics. Conclusions: Serum sufentanil and fentanyl concentrations of 0.71 +/- 0.13 ng/ml and 7.3 +/- 1.3 ng/ml, respectively, are on the steep parts of the concentration-response relationships and facilitate prebypass hemodynamic control in patients undergoing coronary artery bypass grafting with opioid-isoflurane anesthesia. Concentrations of sufentanil greater than or equal to 1.25 + 0.21 ng/ml and of fentanyl greater than or equal to 13.3 +/- 2.2 ng/ml minimize isoflurane requirements but do not improve hemodynamic control.
引用
收藏
页码:852 / 861
页数:10
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