How to use mercury sphygmomanometer and specific pictures or videos

Mercury sphygmomanometer, also known as mercury sphygmomanometer, is the most widely used medical sphygmomanometer at present, but the use method of mercury sphygmomanometer is more complicated, but the value is more accurate.

Application mode

1. within half an hour of blood pressure measurement, the subjects should ban alcohol, coffee and food that will cause excitement. If you have just exercised, you should sit down and rest in a quiet environment for at least ten minutes to calm yourself down and relax, otherwise the measured value will be very high due to activity or nervous mood.

2. After turning on the sphygmomanometer, turn on the switch to see if the mercury column is at the "0" scale. If not, it must be calibrated, otherwise it will affect the measured value.

3. Turn off the switch of the balloon, hold down the cuff with one hand, and hold down the balloon with the other hand to inflate the cuff to see if the mercury column will rise or if there is any interruption of mercury. If it doesn't rise or there is a crack, it means that the sphygmomanometer is leaking, or the amount of mercury is reduced, so the sphygmomanometer can't be used for measurement.

When it is hot, the cuffs should be rolled up so that most of the upper arms are exposed. It's best to take off your sleeves. When the weather is cold, reduce the clothes on the measuring arm as much as possible without affecting the warmth, so as to avoid high blood pressure caused by too much clothes.

5. When measuring blood pressure, the examinee can sit or lie on his back, with his upper limbs straight, and his elbow should be at the same level as his heart and slightly extended to the outside.

6. Squeeze the cuff, after exhausting the gas in the cuff, align the middle of the cuff airbag connected with the rubber tube with the elbow socket, and evenly wind the cuff around the upper arm. The lower end of the cuff is 2-3 cm above the elbow socket, and the tightness should be suitable for putting a finger in.

7. When measuring, the chest radiograph of the stethoscope, that is, the receiver should be placed at the brachial artery of the cubital fossa, and it must not be stuffed into the cuff for convenience and convenience, which will make the measured blood pressure higher than the actual value.

8. Wear a stethoscope, turn off the balloon switch, inflate the cuff until the beating sound of brachial artery disappears, then inflate until the mercury column continues to rise for 20 ~ 30 mmHg, keep the eye level with the mercury column scale, turn on the balloon switch, and deflate evenly and slowly at a speed of 4mmHg per second, not too fast.

9. In the process of mercury falling, the scale represented by the clear first beating sound is the systolic blood pressure of the subject; Next, you will always hear the beating sound. When the pulsatile sound suddenly weakens or disappears, the indicated scale is diastolic pressure.

10. If the blood pressure value is too abnormal during measurement, or the measurer can't hear clearly, the gas in the cuff should be exhausted first, and the mercury column should be reduced to "0" scale, and then the second measurement should be made after waiting for a period of time. Generally, continuous measurement is not allowed for more than two times, and the lowest result obtained by measurement shall prevail.

1 1. After the measurement, remove the cuff, squeeze and exhaust, turn off the balloon switch, fold it and put it in the box. Don't forget to tilt the cover of the blood pressure tank 45 to the right, so that the mercury can completely flow back into the water tank, then turn off the switch of the mercury tank and close the cover. If mercury is not refluxed, the mercury column will break when it is used next time, and the volatilization of mercury will become very fast. At present, some mercury sphygmomanometers have made it clear that there is no need for backflow, which is handled according to the manufacturer's product instructions.

You can watch the following video;

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Matters needing attention

1. Due to the direction of blood flow, the blood pressure measured by the left hand and the right hand is usually somewhat different; Usually, the blood pressure of the right hand is slightly higher than that of the left hand, but the difference of 10~20mmHg is normal. However, the high measured data shall prevail when recording. If the difference between hands is more than 40 ~ 50mmhg, it may be blood vessel blockage. It is best to consult a doctor to find out the reason.

2, don't just count your blood pressure once, measure your blood pressure several times a day and record it, so that you can understand the changes in your blood pressure in one day.

3. It's best to take blood pressure when relaxing at home, because some people feel nervous when taking blood pressure in medical institutions, which leads to an increase in blood pressure. Medically called "white hypertension", measuring blood pressure at home can overcome this situation.

4, the traditional mercury sphygmomanometer will be affected by thermal expansion and contraction, and the zero position should be calibrated once every six months on average.

References:

Baidu encyclopedia-mercury sphygmomanometer