Effects of desflurane and isoflurane on hepatic and renal functions and coagulation profile during donor hepatectomy.

We compared the effect of two inhalation anesthetics desflurane and isoflurane on postoperative hepatic and renal functions as well as coagulation profiles in living donors undergoing right hepatectomy. This study was performed on 80 patients who were randomly allocated to group D (desflurane, n = 40) or group I (isoflurane, n = 40) after Faculty Ethics Committee approval. After induction, isoflurane or desflurane was used with air/oxygen for anesthetic maintenance. The isoflurane or desflurane concentration was set at one minimum alveolar concentration (MAC). Remifentanil was infused for analgesia as well as cisatracurium. Aspartate aminotransferase (AST), alanine aminotransferase (ALT), international normalized ratio (INR), albumin, total bilirubin, blood urea nitrogen, creatinine, platelet count, and hemoglobin levels were analyzed preoperatively at end of the operation, and on postoperative days (PODs) 1, 2, 3, 5, 7, and 30. Both AST and ALT differed significantly and continually except on POD 30. AST showed significant elevations from the end of the operation to POD 2 and ALT, from the end of the operation to POD 5 in group I compared with group D. INR was significantly higher from the end of the operation to POD 3 in group I and to POD 2 in group D. At the end of the operation as well as on POD 1 and POD 2, INR was significantly increased in group I compared with group D. Albumin level was significantly lower at the end of the operation in both groups, but it was not different. No patient developed hepatic or renal failure. Our study showed better postoperative hepatic tests and INR using desflurane than isoflurane at equivalent doses of 1 MAC in living donors undergoing right hepatectomy.

Bispectral index monitoring to guide end-tidal isoflurane concentration at three phases of operation in patients with end-stage liver disease undergoing orthotopic liver transplantation.

It has been shown that anesthetic requirements during liver transplantation are inversely proportional to the degree of hepatic dysfunction. We investigate alterations during the three phases of requirements for intraoperative isoflurane within the target of 40 to 55 Bispectral Index (BIS) values concerning patients with end-stage liver disease who are undergoing liver transplantation. After faculty ethics committee approval, we studied 50 patients of (age range, 18 to 65 years) who were undergoing liver transplantation. After induction, we used isoflurane with air/oxygen (FiO(2) = 0.5%) for anesthetic maintenance. The isoflurane concentration was set within the range of 40 to 55 BIS values. Remifentanil (0.15 µg/kg/min) was infused for analgesia and cisatracurium was administered via continuous infusion. After anesthetic induction, we inserted arterial, pulmonary artery, and central venous catheters. The heart rate, mean arterial pressure (MAP), mean pulmonary arterial pressure (MPAP), body temperature, BIS values, end-tidal isoflurane concentration (ETiso) and end-tidal carbon dioxide concentration (ETCO(2)) were recorded at 30-minute intervals during the dissection and neohepatic phases, at 15-minute intervals during the anhepatic phase. In addition, we calculated the cardiac index during the three phases. There was no difference in heart rates among the operative phases. In contrast, there were significant changes in MAP, MPAP, BIS, ETCO(2) and body temperature values. However, all of these parameters were in physiological ranges and clinically acceptable. The ETiso values were lowest in the anhepatic phase compared to other phases, but the differences were not clinically important. The ETiso values in the dissection and neohepatic phases were compared with the anhepatic phase higher 5% and 8.6% respectively. During liver transplantation, ETiso requirement for the anhepatic phase was lower compared with the other two phases within the range of 40 to 55 BIS values.