Acetaminophen Reduces acute and persistent incisional pain after hysterectomy

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COD: 2802_15_05_2018_AOP Categorie: ,

Onur Koyuncu, Sedat Hakimoglu, Mustafa Ugur, Cagla Akkurt,
Selim Turhanoglu, Daniel Sessler, Alparslan Turan

Ann Ital Chir, Digital Edition 2018; 7
Epub Ahead of Print – May 15

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OBJECTIVE: Acetaminophen is effective for acute surgical pain, but whether it reduces persistent incision pain remains
unknown. We tested the primary hypothesis that patients given perioperative acetaminophen have less incisional pain
three months after surgery. Our secondary hypotheses were that patients randomized to acetaminophen have less postoperative
pain and analgesic consumption, and better functional recovery at three months.
METHODS: 140 patients having abdominal hysterectomy were randomly assigned to: 1)intravenous acetaminophen (4
g/day for 72 postoperative hours); or, 2) saline placebo. The primary outcome was incisional pain visual analog scale
(VAS) at three months after surgery. The secondary outcomes were (1, 2) postoperative VAS scores while laying and sitting
and (3) total patient-controlled intravenous tramadol consumption during the initial 24 hours, (4) DN4 questionnaires
and (5) SF-12 at three months after surgery.
RESULTS: The persistent incisional pain scores at three months were significantly lower in acetaminophen (median
[Q1, Q3]: 0 [0, 0]) as compared with saline group (0 [0, 1]) (P = 0.002). Specifically, 89%, 9%, and 2% of acetaminophen
patients with VAS pain score at three months of 0, 1, and 2 or more, as compared with 66%, 23%, and
10% in the saline group (odds ratio: 2.19 (95% CI: 1.33, 3.59), P = 0.002). Secondly, postoperative pain scores both
laying and sitting were significantly lower in the acetaminophen group. Acetaminophen group had significantly better
DN4 score and mental health related but not physical health related quality of life.
CONCLUSIONS: Our results suggest that acetaminophen reduces the risk and intensity of persistent incisional pain. However,
there are other mechanisms by which acetaminophen might reduce persistent pain.

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