![]() ![]() The bag is connected to the sphygmomanometer. An inflatable pressure bag is wrapped around the upper arm.The normal diastolic pressure is usually between 70 and 80mmHg.īlood pressure is measured using an instrument called a sphygmomanometer. Diastolic – is the pressure against the arteries as the heart relaxes and fills with blood. ![]() The normal systolic pressure is usually between 110 and 130mmHg.
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