The blood pressure measurement methods include direct measurement method and indirect measurement method: 1 The direct measurement method is a long catheter in which an anticoagulant is dissolved, and the catheter is delivered to the aorta by percutaneous puncture, and the catheter is connected with a pressure sensor to directly display blood pressure. This Act is an invasive approach and is only applicable to certain special circumstances. 2 Indirect measurement method, that is, cuff compression method, measured with a sphygmomanometer. The sphygmomanometer has a mercury column, spring type and electronic sphygmomanometer. The indirect measurement method is simple and easy to implement, and is currently widely used in clinical practice.
1. Measurement method (cuff press method)
(1) The radial artery is at the same level as the heart. In the supine position, the middle line is flat, and the fourth rib is flat when sitting.
(2) Roll up the sleeves, expose the arms, straighten the elbows, and palm up.
(3) Turn on the sphygmomanometer, stabilize it vertically, and open the mercury tank switch.
(4) In addition to the air inside the cuff, the cuff is wrapped around the middle of the upper arm, and the lower edge is 2 to 3 cm from the elbow, so that one finger can be inserted as a tight fit.
(5) Touch the radial artery pulsation, place the stethoscope head on the obvious beat, fix it by hand, gently pressurize, close the valve, inflate to the iliac artery and disappear and then increase 20~30mmHg.
(6) Slowly deflate, the speed is lowered by 4mmHg/sec in the mercury column, pay attention to the change of the mercury column scale and the radial artery sound.
(7) When the first pulsation sound of the stethoscope appears, the scale indicated by the mercury column is the systolic pressure. When the pulsation sound suddenly becomes weak or disappears, the scale indicated by the mercury column is the diastolic pressure.
(8) After the measurement is completed, drain the cuffs, tighten the screw cap on the valve, untie