What is blood pressure measurement? Why measure blood pressure? How to measure blood pressure accurately

When you're suffering from high blood pressure and want to know how well your body is functioning, measuring the accuracy of reading can be important. Here we'll explore some tips on getting an accurate measurement!


1 What is blood pressure measurement?

Blood pressure measurement concept

Blood pressure measurement is one of the manual examination methods to measure the increase and decrease of a person’s blood pressure in a certain period of time to assess the body’s blood pressure index, and to support the examination and treatment process. sick.

 Đo huyết áp

Principle of blood pressure measurement

Blood pressure measurement is performed based on the principle of inflating a rubber armband to release the pulse of an artery and then gradually releasing the air to help observe and record the response of the artery. the basis for diagnosis.

Blood pressure measurement results include 2 important indicators:

Systolic blood pressure: Determined at the time when blood begins to pass through the lumen when the pressure in the rubber band begins to decrease.

Diastolic blood pressure: Corresponds to the time when blood is completely free to circulate in the artery when there is no pressure from the rubber band on that artery.

Nguyên lí đo huyết áp

2 Why measure blood pressure?

For the elderly, sick people, or people with blood pressure problems, blood pressure measurement is very necessary. This helps you to check and monitor your blood pressure regularly so that abnormal health problems can be detected for appropriate treatment.

3 The most accurate way to measure blood pressure at home

Standard posture to measure blood pressure

To measure blood pressure for the most accurate results, the patient must choose a comfortable sitting position, before relaxing for 5 minutes.

Do not measure blood pressure immediately after running fast, climbing stairs, just having a full meal, being too hungry, or too tired …, because the blood pressure is then high or lower than the normal number.

Tư thể chuẩn để đo huyết áp

Blood pressure measurement location

With electronics, blood pressure can be measured in the upper arm or wrist as long as the touch point in the cuff is at heart level. Specifically:

If measuring on the biceps: The arm can be placed on the table with the touch point about 2cm above the elbow crease.

If measuring at the wrist: Bend your arm at an angle of about 45 degrees so that the wrist is level with the heart.

Manipulation of blood pressure

After you have determined the position and measurement position, you put on the hand wrap and press the control button on the machine to start the measurement process. Hold the position until the results are displayed on the screen, then turn off the device.

Thao tác đo huyết áp


  • When measuring blood pressure, you should pay attention not to eat, drink, or speak while measuring blood pressure because it will cause erroneous results.
  • When measuring for the first time, measure both arms so that later choose the arm with the blood pressure that tends to be higher.
  • Blood pressure should be measured twice a day, in the morning before taking the medicine and in the afternoon about 1 hour after meals.
  • Record all results with the date and time of the measurement in a notebook for the physician to easily evaluate during the follow-up visit.

Result of blood pressure measurement

When reporting results, you must record both systolic (large number) and diastolic (small number) values because doctors can only diagnose disease and assess progress when both values are available. In there:

  • Normal blood pressure: The systolic blood pressure is less than 120 mmHg and the diastolic blood pressure is less than 80 mmHg.
  • High blood pressure: When the systolic blood pressure is greater than 140 mmHg and the diastolic blood pressure is greater than 90 mm Hg.
  • Prehypertension: The values of the blood pressure readings are between normal and high blood pressure (systolic blood pressure 120-139 mmHg or diastolic blood pressure 80-89 mmHg ).
  • Low blood pressure: Diagnosed when systolic blood pressure is less than 90 mmHg or 25 mmHg lower than normal.

Kết quả đo huyết áp

(DBP: Systolic blood pressure; HATtr: Diastolic blood pressure; BP: Blood pressure; BP: Hypertension)

Reference: imedicare.vn

Above is information on how to measure blood pressure accurately that we share with you. If you have any questions, please leave your information below the article.