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Effects of different anesthetic techniques on serum leptin, C-reactive protein, and cortisol concentrations in anorectal surgery.

Author(s): Buyukkocak U, Daphan C, Caglayan O, Aydinuraz K, Kaya T, Saygun O, Agalar F

Affiliation(s): 1Department of Anesthesiology and Reanimation, Kirikkale University School of Medicine, Kirikkale, Turkey. unaseb@yahoo.com

Publication date & source: 2006-12, Croat Med J., 47(6):862-8.

Publication type: Randomized Controlled Trial

AIM: To compare the effects of intratracheal general anesthesia (ITGA) and regional (saddle block) anesthesia on leptin, C-reactive protein (CRP), and cortisol blood concentrations during anorectal surgery. METHODS: Fifty-eight patients suffering from hemorrhoidal disease, pilonidal sinus, anal fissure, or anal fistula were included the study. Patients were randomly assigned into one of the two groups (n=29). Patients in one group received ITGA. After thiopental and fentanyl induction, vecuronium was used as a muscle relaxant. Anesthesia was maintained with sevoflurane. In the other group we applied saddle block, injecting hyperbaric bupivacaine into the subarachnoid space, through the L3-L4 intervertebral space, in the sitting position. Blood samples were collected for leptin, CRP, and cortisol analysis before the induction of anesthesia at 3 and 24 hours postoperatively. RESULTS: Preoperative leptin, CRP, and cortisol concentrations were comparable between the groups. There was no significant difference in postoperative levels of leptin and CRP in both groups. Although not significant, leptin and CRP concentrations were lower in the saddle block group at three hours postoperatively (mean-/+SD, 6.95-/+8.59 and 6.02-/+12.25, respectively) than in the ITGA group (mean-/+SD, 9.04-/+9.89 and 8.40-/+15.75, respectively). During early postoperative period, cortisol increased slightly in the ITGA group and remained at similar level in the saddle block group, but later decreased in both groups. Cortisol levels in the saddle block group were significantly lower than in the ITGA group at 3 hours postoperatively (343.7-/+329.6 vs 611.4-/+569.8; P=0.034). CONCLUSION: Saddle block, a regional anesthetic technique, may attenuate stress response in patients undergoing anorectal surgery, by blocking afferent neural input during early postoperative period.

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