Before, during, or after procedures in the operating room, the patient is heated using the Warming System (PWS), that utilises a warmed surgery table pad and optional overbody blanket as soon as the patient is transferred to the surgical table .Using conductive heat transmission, the Patient Warming Devices is an airless heating system that transfers heat by coming into close proximity to the warming blanket or the surgery table pad.

Forced-air warming, causes convection current activity close to the surgical site, which could interfere with ventilation airflows used to remove airborne pollutants from the surgical site. The goal of hypothermia during surgery prevention is to lessen or completely eliminate the drop in core temperature with Patient Warming Devices that occurs prior to, during, and right after anaesthesia induction.