when measuring blood pressure, where is the sphygmomanometer placed? When measuring blood pressure, the sphygmomanometer should be placed parallel to the arm, neither too high nor too low.
measuring blood pressure requires a stethoscope and a sphygmomanometer. At present, there are three kinds of sphygmomanometers in use: mercury, pneumatic and electronic, and mercury sphygmomanometers are the most commonly used. ?
During the measurement, the subjects should rest quietly for 5 minutes to eliminate the influence of tension and fatigue on blood pressure. The subject can sit or lie on his back, and the arm to be tested should be at the same level as the right atrium (the arm should be at the same level as the fourth costal cartilage when sitting, and at the level of the axillary midline when lying), and abduction should be 45 degrees.
roll up the sleeve to the armpit, or take off one sleeve to facilitate measurement. Before measuring blood pressure, the gas in the cuff of the sphygmomanometer should be drained first, and then the cuff should be tied to the upper arm smoothly, not too loose or too tight, so as not to affect the accuracy of the measurement. The middle of the air bag faces the brachial artery of the cubital fossa, and the lower edge of the cuff is 2 ~ 3 cm away from the cubital fossa.
turn on the mercury tank switch. Find out the pulsation of brachial artery with index finger and middle finger. Place the chest piece of stethoscope (i.e. the round head of stethoscope) on the part with the strongest pulsation of brachial artery, and attach it closely to the skin, gently press it and fix it with the left hand.
Hold the balloon of the sphygmomanometer in your right hand, close the air valve on the balloon, and repeatedly pump air into the cuff until the pulsation of the brachial artery disappears, and then let the mercury rise for 2 ~ 3mm, then slightly loosen the air valve and release the gas in the cuff, so that the mercury will slowly drop at a constant speed. Pay attention to the change of sound and the scale on the mercury column. ?
When the first sound is heard, the milligram indicated by the mercury column is the systolic blood pressure; When the sound suddenly becomes weak, the millimeter indicated by mercury column is diastolic pressure. If you don't hear clearly, you should first let the gas in the cuff drop to zero, pause for a moment, then repeat the measurement and remember the measured value accurately. ?
after the measurement, the gas in the cuff should be drained, the screw cap of the air valve should be tightened, the cuff should be untied, it should be folded neatly and placed flat in the box with the balloon, and the mercury tank switch should be turned off to prevent mercury from flowing back. Finally, close the lid of the sphygmomanometer. ?
If you need to observe the blood pressure changes every day, you should use the same sphygmomanometer to measure the blood pressure of the same arm at the same time and in the same position, so that the measured results are more reliable. Patients with better economic conditions can buy the electronic sphygmomanometer currently on the market, which is very convenient to use.