PMID- 9068166 OWN - NLM STAT- MEDLINE DCOM- 19970527 LR - 20191024 IS - 0161-3499 (Print) IS - 0161-3499 (Linking) VI - 26 IP - 2 DP - 1997 Mar-Apr TI - Preliminary investigations of pain and analgesia assessment in horses administered phenylbutazone or placebo after arthroscopic surgery. PG - 150-5 AB - Twenty-five horses undergoing arthroscopic surgery were studied to develop a scheme for assessing pain in horses while investigating the effects of phenylbutazone (PBZ) analgesia. Fifteen of the 25 horses received PBZ 4 mg/kg intravenously (IV) before surgery and 2 mg/kg (IV) every 12 hours thereafter until 60 hours; the remaining 10 (placebo group) were given a corresponding volume of saline. In both groups, venous blood samples were collected for catecholamine, beta-endorphin, and cortisol assays before premedication and up to 72 hours after surgery. Postoperative pain was evaluated by measuring predefined behavioral and physiological variables. A total postoperative pain severity index (TPPSI) was calculated using all variables. There were no differences between PBZ and placebo groups in plasma beta-endorphin or catecholamine concentrations, but the TPPSI was higher in the placebo group than in the PBZ group, suggesting that perioperative treatment with PBZ has some analgesic benefit. This study shows the difficulties associated with pain assessment in horses. FAU - Raekallio, M AU - Raekallio M AD - Faculty of Veterinary Medicine, Department of Clinical Sciences, University of Helsinki, Finland. FAU - Taylor, P M AU - Taylor PM FAU - Bennett, R C AU - Bennett RC LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Vet Surg JT - Veterinary surgery : VS JID - 8113214 RN - 0 (Anti-Inflammatory Agents, Non-Steroidal) RN - 0 (Catecholamines) RN - 60617-12-1 (beta-Endorphin) RN - GN5P7K3T8S (Phenylbutazone) RN - WI4X0X7BPJ (Hydrocortisone) SB - IM MH - Analgesia/*veterinary MH - Animals MH - Anti-Inflammatory Agents, Non-Steroidal/administration & dosage/*therapeutic use MH - Arthroscopy/veterinary MH - Catecholamines/blood MH - Horse Diseases/*drug therapy MH - Horses/*surgery MH - Hydrocortisone/blood MH - Pain Measurement/*veterinary MH - Pain, Postoperative/drug therapy/*veterinary MH - Phenylbutazone/administration & dosage/*therapeutic use MH - Preanesthetic Medication MH - beta-Endorphin/blood EDAT- 1997/03/01 00:00 MHDA- 1997/03/01 00:01 CRDT- 1997/03/01 00:00 PHST- 1997/03/01 00:00 [pubmed] PHST- 1997/03/01 00:01 [medline] PHST- 1997/03/01 00:00 [entrez] AID - S0161349997000215 [pii] AID - 10.1111/j.1532-950x.1997.tb01478.x [doi] PST - ppublish SO - Vet Surg. 1997 Mar-Apr;26(2):150-5. doi: 10.1111/j.1532-950x.1997.tb01478.x.