Implication of Serum Fluoride Level Caused by Sevoflurane Versus Isoflurane Anesthesia Upon Renal Function After Kidney Transplantation.

Eighty patients with end stage renal failure undergoing living donor kidney transplant under general anesthesia were included in this study, by using an open (non-blinded) study design, patients were randomly assigned to two groups, 15 patients in each. Randomization was done through computer generated random tables. Isoflurane group; anesthesia was maintained with isoflurane 1-2%. Sevoflurane group; anesthesia was maintained with Sevoflurane 1-2%.

A peripheral intravenous access was secured in the hand opposite to the functioning fistula and induction of anesthesia was done with propofol 2mg/kg, neuromuscular blockade was maintained with atracurium 0.6mg/kg and all patients were intubated and ventilated to maintain end-tidal carbon dioxide (ETCO2) concentration between 30-40 mmHg. Anaesthesia was maintained with 1-2% isoflurane (isoflurane group) or 1-2% sevoflurane (sevoflurane group) with fresh gas flow of 2 L/min. In both groups inhalational anesthetic was delivered in an air-oxygen mixture of 1:1 ratio. Analgesia was maintained with fentanyl 1µg/kg/hr. Mannitol and sodium bicarbonate was given immediately before reperfusion (de-clamping of renal artery). Intraoperative monitoring included heart rate, noninvasive blood pressure, oxygen saturation, ETCO2, ECG and central venous line was placed in the right or left internal jugular vein depending upon the presence of dialysis catheter. Hemodynamic target include: mean arterial pressure of > 80mmHg, CVP between 10-15 mm Hg to optimize cardiac output and renal blood flow.