Q.Normal diastolic blood pressure is

The sphygmomanometer, or blood pressure meter, measures blood pressure using an inflatable cuff on the upper arm connected to a mercury column, mechanical dial, or digital sensor. In the manual method, the cuff is inflated above arterial pressure and then slowly deflated while a stethoscope over the brachial artery listens for the returning pulse: the sound's first appearance marks systolic pressure and its disappearance marks diastolic pressure, with a normal reading of 120/80 mmHg. Types include manual mercury sphygmomanometers (no calibration needed), manual aneroid (dial) types (needing periodic calibration), an …