MODEL RELEASED. Cold treatment for sprained ankle. Woman lies on a bench with her raised foot inside a pressurised cold water jacket (Jobst cryo/temp machine) designed to relieve a sprained ankle. An assistant is in attendance. The jobst cryo/temp machine works like an ice-pack but applies higher pressure and allows fine control of temperature. The inflatable jacket contains cold water pumped in at high pressure and maintained at a precise temperature. Sprained ankle is caused by tearing of a muscle, igament or tendon in the ankle. The injury typically produces swelling and bruising after the initial pain subsides, and may take weeks to heal completely.