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The traditional tool for measuring blood pressure is the mercury sphygmomanometer. The mercury sphygmomanometer was created in 1928, 91 years ago. Mercury sphygmomanometers have certain technical requirements for measuring blood pressure, and although this technique is a small case for doctors and nurses, it is still difficult for the average patient and may not be measured accurately.

However, this is not the main problem. The biggest problem with mercury blood pressure monitors is mercury contamination. Mercury, commonly known as mercury, is liquid at room temperature and is highly volatile and adsorbent. Mercury and mercury compounds are very toxic and can be toxic at low doses. Mercury and mercury compounds can enter the body through the respiratory tract, skin contact, and the digestive tract, causing poisoning to various organs of the body such as the nervous system, blood system, kidneys, mouth, digestive system, and reproductive system, with particularly serious effects on pregnant women and children. The mercury content of a mercury sphygmomanometer is 50-100g, compared with the mercury thermometer is simply a small witch, mercury sphygmomanometer can be imagined the harm.

Be emotionally settled before the measurement. Sit quietly and rest for 15 minutes, do not think nervously about a particular thing, or speculate repeatedly about your blood pressure to anticipate it, or hold an apprehensive mood. Patients who are having their blood pressure measured for the first time in particular do not need to panic (when measuring, the arm will be slightly numb and there is no pain), otherwise it will all affect the blood pressure.

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