Heated anesthetic circuit reduced heat loss in rabbits

A heated anesthetic circuit helped limit temperature loss in anesthetized New Zealand white rabbits in a new American Journal of Veterinary Research study from Oklahoma State University, adding fresh evidence for a simple warming strategy in a species that’s especially prone to peri-anesthetic hypothermia. In the randomized crossover trial, 10 healthy male rabbits underwent two isoflurane anesthetic events, one with a commercially available heated circuit and one with the same circuit unheated. Hypothermia occurred in all 10 nonwarmed events and in 7 of 10 warmed events, and temperatures in the warmed group stayed significantly higher throughout anesthesia. The paper was published online April 28, 2026, and evaluated the Darvall Heated ZDS Qube system. (pubmed.ncbi.nlm.nih.gov)

Why it matters: Rabbit patients lose heat quickly under anesthesia, and hypothermia can deepen anesthetic effects, delay recovery, and contribute to cardiopulmonary and coagulation complications. The new data suggest that warming inspired gases can reduce, though not eliminate, heat loss, which is relevant for exotics teams, research facilities, and any practice refining rabbit anesthesia protocols beyond surface warming alone. Related recent work in JAALAS likewise found that warmed inspired air, added to conductive mattress warming, maintained higher body temperatures in anesthetized rabbits starting 10 minutes after induction. (vin.com)

What to watch: Whether follow-up studies test heated circuits in clinical rabbit patients, longer procedures, multimodal warming protocols, and recovery outcomes beyond temperature alone. (pubmed.ncbi.nlm.nih.gov)