what is a pulse volume recording
What is a pulse volume recording (PVR) study? A PVR study is a noninvasive vascular test in which blood pressure cuffs and a hand-held ultrasound device (called a Doppler or transducer) are used to obtain information about arterial blood flow in the arms and legs.
pulse oximeter. A device for the continuous monitoring of the blood oxygen levels, both by visible and audible means, during general anaesthesia. This is a major aid to patient safety as a very small drop in blood oxygenation is immediately apparent, alerting the anaesthetist to investigate the cause.