Sensors for polysomnography track a variety of processes in the body. It is placed on the head to show brain wave patterns, which are used to determine what stages of sleep or wakefulness a person is in.
Sequential Compression Devices consist of a pair of sleeves containing multiple chambers, which are sequentially inflated from the anide to the knee or mid-thigh. Sequential compression devices are used to minimize the risk of deep venous thrombosis until the patient is fairly mobile. These devices consist of sleeves that fill with air and a pump.