INTRAPERITONEAL AND INCISIONAL BUPIVACAINE ANALGESIA FOR MAJOR ABDOMINAL/GYNECOLOGIC SURGERY: A PLACEBO CONTROLLED TRIAL
2006
Background: Postoperative pain is an important surgical problem. Recent
studies in pain pathophysiology have led to the hypothesis that with
periopera-tive administration of analgesics (pre-emptive analgesia) it
may be possible to prevent or reduce postoperative pain. This study was
planned to investigate the efficacy of pre-emptive analgesia on
postoperative pain after major gyneco-logic abdominal surgeries.
Methods: In this prospective, double-blinded, randomized, and
placebo-controlled trial, 60 ASA physical status I and II patients
undergoing major abdomi-nal gynecologic surgeries were randomized to
receive 45 mL of bupivacaine 0.375% or 45mL of normal saline; 30 mL and
15 mL of the treatment solution was administered into the peritoneal
cavity and incision, respectively, before wound clo-sure. The pain
score of the patients was evaluated by the visual analogue scale (VAS)
on awakening, and at 6, 12, and 24h after surgery. Time to first
analgesia re-quest and total analgesic requirements in the first 24h
were recorded. Results: Pain scores were significantly higher in the
placebo group than in the bupivacaine group on awakening
(5.98±1.01 v.s 1.05±1.05; p<0.001), and at 6h after
surgery (5.37±0.85 vs. 2.51±1.02; p<0.001). First request
to analgesia was significantly longer in the bupivacaine patients than
in the placebo group (5.87±3.04 h vs. 1.35±0.36; p<0.001).
Meperidine consumption over 24h was 96.00 ±17.53 mg in the placebo
group compared with 23.28 ±14.89 mg in the bupivacaine patients
(p<0.001). Conclusion: A combination of intraperitoneal and
incisional bupivacaine in-filtration at the end of abdominal
gynecologic surgeries reduces postoperative pain on awakening and for 6
hours after surgery, and provides significant opioid-sparing analgesia
for 24 h after gynecologic abdominal surgeries.
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