• Siriwan Jirasiritham, Kamthorn Tantivitayatan, and Sopon Jirasiritham.
• Department of Anesthesiology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand.
• J Med Assoc Thai. 2004 Jun 1; 87 (6): 660-4.

UnlabelledHemorrhoidectomy can be done in many positions under many anesthetic techniques as an ambulatory surgery. Post-procedural pain is frequently severe enough to delay home discharge. A combination between preincisional local anesthetics and general anesthesia looks attractive in terms of preemptive analgesia and starting time of surgery. The study aimed to compare anesthetic time, pain-free period and pain relief in patients with and without 0.5% plain bupivacaine infiltration after mask inhalation, total intravenous anesthesia or endotracheal tube general anesthesia.Material And Method142 patients were randomized into control (C) and study (S) groups with n = 70 and 72 respectively. Patient characteristics in both groups were: age 40.45 +/- 13.03 VS 37.48 +/- 13.63 years old, BW 59.77 +/- 11.19 VS 58.80 +/- 9.76 kg, male:female 31/39 VS 43/29, PS 1/2/3/E = 48/19/1/2 VS 53/15/3/1 for C and S respectively. All underwent surgery in lithotomy under ET/TIVA/mask: 53/13/4 VS 22/27/23 and anesthetic time was 49.02 +/- 18.04 VS 33.33 +/- 10.31 min (p < 0.05).ResultsPain-free periods in C and S were 204.44 +/- 878.07 and 540 +/- 298.03 min with median times of 57.5 (n = 67) VS 560 (n = 58) min. Pain severity in S was mainly none or mild degree while in C it was moderate or severe, apparently when analysed in subgroups of ET and TIVA. Analgesic requirements were statistically more in group C.ConclusionBetter postoperative pain relief could be accomplished by preincisional 0.5% plain bupivacaine infiltration after general anesthesia. The technique helped relax anal muscles for surgical ease and avoided patient discomfort in case of a prolonged procedure. Preemptive analgesia and key pain management were discussed.

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