Blood pressure can be measured lying down by placing the arms at the sides of the body, placing the stethoscope at the brachial artery pulsation at the elbow socket, and measuring the blood pressure by cuff pressurization, deflation, and auscultation of the brachial artery pulsation.
Before lying down to measure blood pressure, you should ensure that you rest for 5 to 10 minutes and do not drink stimulating beverages such as coffee and strong tea. Place the arm on the side of the body so that the elbow is at the same level as the heart. The lower edge of the cuff is tied at the elbow socket at 2 horizontal fingers, loosened so that it can be put into a finger, too tight or too loose will affect the blood pressure measurement value. The stethoscope is placed in the elbow socket at the brachial artery pulsation, not in the cuff.
Open the mercury sphygmomanometer, the airbag inflated to the brachial artery pulsation sound disappeared after the blood pressure rose again 20 ~ 30mmHg, loose open air knob, so that the blood pressure value to 2 ~ 6mmHg / s speed slowly down, when the first sound of the brachial artery pulsation is heard, this time the blood pressure value for the systolic blood pressure, listening to the brachial artery pulsation disappeared when the value of the diastolic blood pressure.
After measuring the blood pressure, repeat the measurement once at an interval of 1~2min, and take the average value as the measurement result. Measurement of blood pressure can be reasonably carried out under the guidance of a medical professional.