The use and selection of electronic sphygmomanometers With the growing awareness of people's self-care, more and more families are beginning to pay attention to the daily monitoring and control of their own blood pressure. Now on the market to sell all kinds of automatic or semi-automatic electronic sphygmomanometer, are to the sensor will be converted into an electrical signal pulsation, and then by the computer processing is displayed as the value of blood pressure, replacing the traditional plus stethoscope mercury mercury sphygmomanometer. The advantages of electronic sphygmomanometers are lightweight, easy to carry, easy to use, easy to self-measurement, and therefore suitable for home health care, especially for business trips and travel use. Since the blood pressure measurement method of mercury sphygmomanometer plus stethoscope is still used as a benchmark for measurement in clinical practice, the traditional mercury sphygmomanometer is currently used by doctors to measure blood pressure. If the electronic sphygmomanometer is compared with the blood pressure value measured by the doctor in the clinic, there may be a certain amount of error. As long as this relative error is not too large (generally not more than 10mmHg), it will be fine. How to choose an electronic blood pressure monitor? There are three ways: First, look at the brand. To choose a good brand of electronic sphygmomanometer, its product specification should be metrological license mark and drug supervision and management departments issued by the product production license number, as well as detailed instructions on the correct use of the product. If you do not understand the correct use of the product, it will also affect the correctness of the measurement results. Second look at the repeatability of the measurement results. According to the product manual of the correct method of use in the blood pressure on the body of a normal person to repeat a few measurements to see the results of the average value and the error value of each measurement. If the error is too large, the repeatability of the product is not good. Third, look at the correctness of the measurement results. Compare the results measured on the same blood pressure normal person with the results measured in the hospital to see the error value of the results. If the error is not too large, it can be used as a reference for future measurements.
2. How to use and choose a blood pressure monitor?
With the popularization of medical knowledge, the sphygmomanometer has long ceased to be a special instrument in hospitals, and many families have begun to buy and use sphygmomanometers. Commonly used sphygmomanometer mercury column sphygmomanometer, electronic sphygmomanometer and barometer type sphygmomanometer three.
The mercury sphygmomanometer is generally considered to be more accurate and stable. However, because of the need to use with a stethoscope to listen to the sound measurement of blood pressure, so the user's technical requirements are higher. Inadequate technique and improper operation can easily lead to errors in blood pressure measurement. Mercury column sphygmomanometers are now mainly used by hospitals.
Electronic sphygmomanometerElectronic sphygmomanometer is lightweight, easy to carry, easy to operate, clear display, heart rate, blood pressure measurement is completed once. Generally do not need much maintenance, just pay attention to the usual not fall, not water can be, more suitable for the general family. Currently commercially available electronic blood pressure monitor, such as the measurement of parts to divide, can be divided into wrist and arm type; such as the measurement method to divide, can be divided into fully automatic and semi-automatic type.
3, with the stethoscope of the old sphygmomanometer can you measure your own blood pressure?
Measuring blood pressure requires a stethoscope and a sphygmomanometer. There are three types of sphygmomanometers currently in use: mercury, pneumatic and electronic, with the mercury sphygmomanometer being the most commonly used. During measurement, the subject should rest quietly for 5 minutes to eliminate the effects of tension and fatigue on blood pressure. The patient should be in a sitting or supine position, and the arm should be placed at the same level as the right atrium (the arm should be at the same level as the fourth rib cartilage when sitting, and at the level of the mid-axillary line when lying down) and adducted by 45 degrees. Roll the sleeve up to the armpit or remove one side of the sleeve to facilitate measurement. Before measuring blood pressure, the gas in the cuff of the sphygmomanometer should be emptied first, and then the cuff should be tied flatly to the upper arm without being too loose or too tight, so as not to affect the accuracy of the measurement. The middle of the gas bag is opposite the brachial artery in the elbow socket, and the lower edge of the cuff is 2 to 3 centimeters from the elbow socket. Turn on the mercury tank switch. Feel the brachial artery pulsation with the index and middle fingers, place the chest piece of the stethoscope (i.e., the round head of the stethoscope) on the part of the brachial artery where the pulsation is the strongest and close to the skin, pressurize it gently, and fix it with the left hand. Hold the balloon of the sphygmomanometer with the right hand, close the gas valve on the balloon, and repeatedly pump the gas into the cuff until the beat of the brachial artery disappears, and then after letting the mercury column rise by 20 to 30 millimeters, you can slightly rotate the valve to release the gas in the cuff, so that the mercury column will fall down slowly and uniformly, and pay attention to the change of the sound and the scale on the mercury column. When the first sound is heard, the millimeters indicated by the mercury column is the systolic pressure; when the sound suddenly becomes weak, the millimeters indicated by the mercury column is the diastolic pressure. If the sound is not heard clearly, the gas in the cuff should be released first, so that the mercury column falls to zero, stop for a moment, and then repeat the measurement, and record the measured value. Measurement should be completed to empty the gas inside the cuff, tighten the valve screw cap, unlock the cuff, fold it neatly and balloon flat in the box, close the mercury tank switch to prevent mercury backflow. Finally, close the lid of the sphygmomanometer. If you need to observe the blood pressure changes every day, you should use the same position and the same sphygmomanometer to measure the blood pressure of the same side of the arm at the same time, so that the measured results are more reliable. Patients with better financial conditions can buy the current commercially available electronic sphygmomanometer, which is very convenient to use.
4, sphygmomanometer repair three
Mercury sphygmomanometer is one of the most common failures, is the leakage of mercury. In order to determine the cause, first of all, check the glass tube at both ends of the cork cushion is not padded and screwed tightly; followed by checking the tightness of the vial of mercury storage switch; again is to check the vial of mercury storage with or without trachoma. Judge which level of failure, can be used to gradually increase the pressure of the method, observe the mercury from where to seep out, you can prescribe the right medicine. If the glass tube oozing out at both ends, can be padded or replaced with cork pads, screw the glass tube can be solved. If the switch is poorly closed, generally due to frequent use, the closure gradually poor, the switch can be disassembled for scrubbing, and then the middle of the waterproof silver oozing out of the rubber pads can be replaced, screwed firmly. Such as mercury storage vials have an eye, can be used in the leakage of iron at the eye heating, coated with universal adhesive, the leakage will be blocked or replaced. Of course, artificially pressurized, carry too much attention, the mercury storage bottle switch is not closed, will also cause mercury leakage phenomenon, affecting the accuracy of the sphygmomanometer.
5, electronic sphygmomanometer purchase precautions
Home electronic sphygmomanometer from the measurement of two main types, one is the arm, the second is the wrist. These two electronic blood pressure monitor, for healthy people are applicable. But to make a special point, wrist-type electronic blood pressure monitor, does not apply to patients suffering from blood circulation disorders. Diabetes, hyperlipidemia, hypertension and other diseases will accelerate arteriosclerosis, thus causing patients with peripheral circulation disorders, these patients have a large difference between the wrist blood pressure and the blood pressure measurement of the upper arm. It is recommended that these patients and the elderly choose an arm-type electronic sphygmomanometer. In addition, before purchasing should be measured in the field, choose and their usual blood pressure value closest to the kind.
The electronic sphygmomanometer, if used correctly, should be as accurate as a traditional mercury column or meter sphygmomanometer. But the sensitivity of its beat sensor can cause pressure-measuring errors. And the position of the cuff and straps, movement, friction, surrounding noise, and mechanical or circuit failure can all affect its sensitivity.
Electronic sphygmomanometer has been popularized in large quantities in foreign countries, while our country has only begun to apply soon. Domestic electronic sphygmomanometer is not much, more imported from abroad. Foreign electronic sphygmomanometers with the development of electronic technology, update quickly, has developed to the fourth generation of electronic sphygmomanometers. In the purchase should know more about some related product knowledge, in order to compare the choice.
1. Appearance check China's measurement law expressly provides: "for medical and health care work measuring instruments to implement mandatory verification". Sphygmomanometer is classified as a measuring instrument managed by law. Manufacturers of sphygmomanometers should be produced in a conspicuous position with a label, the contents of which include the name, model, measurement of the upper limit, the name of the manufacturer and the date of shipment, should also indicate the standard number and type approval number.
2. Accuracy check The error of the sphygmomanometer generally ranges from 2 to 3 mmHg. When choosing an electronic sphygmomanometer, you may want to operate it according to the instructions and measure your own blood pressure value, which can be repeated a few times to see if its repeatability is good, and can be compared with the value usually measured by a mercury column sphygmomanometer. In addition, when taking blood pressure measurements, check that there are no missing numbers on the display.
3. Comparison check When shopping, you can compare the performance and price of different models, and you can also select from several products of the same model after you have already decided on the model you want to buy.
4. Alternate method of measurement This is a simple way to determine whether the electronic blood pressure monitor is accurate. The specific practice is this: the first time with a mercury column sphygmomanometer to measure blood pressure, rest for 3 minutes, with an electronic sphygmomanometer to measure the second time, and then rest for 3 minutes, and then finally with a mercury column sphygmomanometer to measure the third time. The average of the first and third measurements is taken, and the difference should generally be less than 5 mmHg compared to the second measurement with the electronic sphygmomanometer. Electronic sphygmomanometer that meets this requirement can be used with confidence.