Peer-reviewed veterinary case report
Dexmedetomidine infusion rates for pain and safety in cats
By Stabile, Marzia et al.·Published in Journal of feline medicine and surgery·2025·University of Bari Aldo Moro, Italy·View original on PubMed →
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Original publication title: Evaluation of different constant rate infusions of dexmedetomidine in cats undergoing elective surgery.
- Species:
- cat
Plain-English summary
A group of 73 healthy female cats undergoing elective surgery were given different doses of a sedative called dexmedetomidine to see which dose provided the best pain relief with the fewest side effects. The highest dose (3 micrograms per kilogram per hour) significantly reduced the need for additional pain relief during surgery and allowed for lower amounts of another anesthetic, isoflurane. While this dose did lead to higher blood pressure, it also resulted in a smoother recovery with fewer signs of agitation compared to the lower doses. Overall, dexmedetomidine appears to be a safe and effective option for managing pain in cats during surgery.
People also search for: cat surgery pain relief · dexmedetomidine for cats · cat anesthesia recovery · high blood pressure in cats during surgery
Abstract
ObjectivesThe objective of the study was to evaluate the effects of three constant rate infusions (CRIs) of dexmedetomidine (DEX; 1, 2 and 3 µg/kg/h) on cardiovascular, respiratory and analgesic outcomes in cats undergoing elective ovariectomy, aiming to identify an infusion rate that optimally balances analgesic benefits with minimal side effects.MethodsIn a randomised, controlled, blinded study, 73 healthy female cats were assigned to one of four groups: DEX1 (1 µg/kg/h), DEX2 (2 µg/kg/h), DEX3 (3 µg/kg/h) or a control group receiving saline solution (CTRL). Anaesthesia was maintained with isoflurane, and physiological variables, including heart rate (HR), blood pressure (BP), respiratory rate (RR) and end-tidal CO, were measured at baseline and specific time points during surgery. Intraoperative analgesia was assessed based on rescue analgesia requirements, and recovery quality was evaluated postoperatively.ResultsDEX CRI reduced isoflurane requirements only in DEX3 at T30 compared with the other groups at the same time point. Blood pressure was higher in DEX3 at T15 and T30 compared with the other groups at the same times, while no differences were observed for HR across all groups at any time of the study. The percentage of cases that required rescue analgesia was significantly lower in the DEX3 group (33%) compared with the CTRL (80%), DEX1 (80%) and DEX2 (86%) groups, which were similar. Recovery quality was similar across the groups, with fewer signs of agitation and dysphoria in DEX2 and DEX3, though DEX3 showed a slightly prolonged recovery.Conclusions and relevanceThis study supports the use of DEX CRI in cats as a valuable and safe option for balanced anaesthesia. Among the doses tested, 3 µg/kg/h provided the most clinically evident intraoperative analgesic and isoflurane-sparing effects with an improved quality of recovery. High blood pressure was observed, which may be considered critical in the clinical setting. Further research is needed to explore rate adjustments for more extensive procedures.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/40448310/