Warm patients safely during orthopedic implant surgery with air-free HotDog Patient Warming. Eleven published studies link forced-air warming to increased airborne contaminants around the surgical site, leading to increased infection risks in orthopedic implant surgery. Many facilities have discontinued warming, but hypothermia can lead to many other negative outcomes. HotDog’s patented semi-conductive fabric technology is the safe warming alternative. It’s the only patient warming system that warms above and below the patient simultaneously for a more versatile and effective warming solution.