Digital Blood Pressure Monitor

Digital BP monitor:  Blood Pressure Devices: Digital devices, also called monitors, will give you the systolic and diastolic blood pressures and the heart rate or pulse (number of heartbeats in a minute). There are 2 types. With a semi-automatic device, you will need to pump air into the cuff by squeezing a bulb.
The principle of digital blood pressure machine: The oscillometric method is employed, which consists on detecting the oscillometric signal on brachial artery, being processed at each pressure step, when the cuff is gradually deflated. Signal sampling is carried out at a rate determined by the heart rate.
Modern digital monitors don’t use mercury, but the principle is the same: A cuff around your arm cuts off blood flow in the artery inside your elbow. As the cuff is loosened, the “whoosh” of blood starting to flow again provides the systolic reading. When the noise stops, that’s the diastolic number.