There are 4 types of active, or mechanical, methods of warming an anesthetized patient that are approved for use with veterinary patients: inline fluid warmers, forced warm
air systems, conductive fabrics, and
circulating warm water
blankets.
During anesthesia the doctors and technicians carefully prevent hypothermia with
circulating warm water pads and Bair Hugger Warmers (warm
air blankets) enveloping each patient.