Comparison of Flunixin Meglumine, Meloxicam and Ketoprofen on Mild Visceral Post-Operative Pain in Horses
ANIMALS(2022)
Abstract
Simple Summary: Pain management following surgical intervention is key. In horses, several anti-inflammatories (flunixin meglumine, meloxicam and ketoprofen) are available for the management of pain following castration. However, their analgesic efficacy remains unclear for mild visceral pain. The aim of this study was to compare the analgesic efficacy of the above-mentioned anti-inflammatory drugs, following a simple surgery (inguinal castration). Horses were administered a randomly assigned anti-inflammatory drug before and after surgery. A pain score was recorded using a previously described pain assessment scale (PASPAS) before administration, and after the first and second administrations by a senior clinician and a veterinary student. Thirty horses were evaluated, and there was no significant effect of the drug administered on the pain score. Horse welfare was not compromised regardless of drug assigned. Horses showed mild pain post-operatively, which decreased significantly within 24 h. Pain scores were significantly different when assessed by a veterinary student and a senior clinician. The authors found that the anti-inflammatory drug studied provided a similar level of analgesia for the management of mild visceral pain in horses, but that the pain scale used is not suitable for junior evaluators or, by extension, owners.& nbsp;The analgesic efficacy of meloxicam and ketoprofen against equine visceral pain is unclear. The aim of this study was to compare the analgesic efficacy of meloxicam (M) and ketoprofen (K) to flunixin meglumine (F) following inguinal castration. Horses undergoing inguinal castration under general anesthesia were randomly assigned F (1.1 mg/kg), M (0.6 mg/kg) or K (2.2 mg/kg) intravenously two hours pre-operatively and 24 h later. A pain score (out of 31) was recorded blindly by a senior clinician and veterinary student before NSAIDs administration (T-0), and after the first (T-1) and second (T-2) administrations, using a modified post-abdominal surgery pain assessment scale (PASPAS). Pain was classified as mild (score & LE; 7), moderate (score = 8-14) or severe (score > 14). Thirty horses (12 F, 10 M, 8 K) aged 6.2 & PLUSMN; 4.9 years, mostly warmbloods, were included. Horse welfare was not compromised regardless of the drug assigned. There was no statistically significant effect of NSAIDs on pain score. Mean pain scores were significantly higher at T-1 than T-0 for each NSAID (F: 5.08 & PLUSMN; 2.50 vs. 1.58 & PLUSMN; 1.38 (p < 0.001); M: 4.60 & PLUSMN; 2.32 vs. 1.10 & PLUSMN; 1.20 (p < 0.001); K: 5.25 & PLUSMN; 1.39 vs. 1.50 & PLUSMN; 1.51 (p < 0.0001)) and lower at T-2 than T-1 for F (2.92 & PLUSMN; 2.423 vs. 5.08 & PLUSMN; 2.50 (p < 0.001)) and M (2.90 & PLUSMN; 1.37 vs. 4.60 & PLUSMN; 2.32 (p < 0.0325)). At T-1, senior pain scores were significantly different than for junior (5.56 & PLUSMN; 0.54 vs. 3.22 & PLUSMN; 0.62, p = 0.005). This study indicates that meloxicam and ketoprofen provide a similar level of analgesia to flunixin meglumine for the management of mild visceral pain in horses. PASPAS is not reliable for junior evaluators.
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Key words
analgesia,anti-inflammatory,castration,pain score,equine
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