In today's increasingly prominent health needs, abnormal blood pressure, as a hidden life threat, is quietly eroding the quality of life of modern people. When hypertension is dubbed "silent killer" and hypotension exists as an "invisible health trap", how to achieve all-weather and accurate blood pressure management has become an urgent health proposition to be solved.

"Doctor, I have such an experience, working until the afternoon, with stiff shoulders and necks, dizziness and brain swelling, and the number on the sphygmomanometer seems to be quietly climbing. But I know that sitting for a long time hurts the body, so frequently switching between sitting and standing positions, getting up to pour a glass of water, and going to the bathroom can actually lower blood pressure more effectively than simply reducing sedentary time... What is the reason?" Mr. Zhang, a 56-year-old employee of a foreign company in Xiangjiang New District, Hunan, went to Xiangya Third Hospital of Central South University to consult Jiang Fenglin, chief physician of the Department of Geriatrics, about this issue.

According to the "Catalogue of Measuring Instruments Implementing Compulsory Management" of the State Administration of Market Supervision, sphygmomanometers used in medical institutions are mandatory verification measuring instruments for medical and health care. In order to ensure their accurate measurement performance, periodic mandatory verification should be carried out by the territorial legal measurement and verification institutions.

One day, I received a local trombone, and then found out that it was my mother's family contracted doctor. She reported to me that my mother's blood pressure control was not good recently, and the blood pressure measured in the hospital was relatively high, but my mother said that the blood pressure measured at home was fine, not as high as in the hospital. Is it the inaccuracy of the sphygmomanometer at home? Or is it the white coat effect? If it is true that the sphygmomanometer is not accurate enough, then according to the value given by the hospital, the blood pressure reduction plan needs to be adjusted.

The electronic sphygmomanometer will directly display systolic and diastolic blood pressure values. Some devices will use SYS to represent systolic blood pressure and DIA to represent diastolic blood pressure. After the measurement, the screen will display two sets of numbers at the same time. The higher value is high pressure and the lower value is low pressure. Some devices will distinguish between normal and abnormal ranges by color. Green indicates normal blood pressure, and yellow or red indicates high blood pressure.

Read the recorded results: the electronic sphygmomanometer displays the value directly after the measurement is completed; the mercury sphygmomanometer keeps the line of sight level with the top of the mercury column when reading, and records systolic and diastolic blood pressure; it is recommended to take the average value for 2 consecutive measurements.

Preparation Before Measurement: Strenuous exercise, eating, smoking, drinking caffeinated beverages or strong tea should be avoided within 1 hour before blood pressure measurement. These activities may lead to inaccurate blood pressure measurement. For people with orthostatic (orthostatic) hypotension, supine and orthostatic blood pressure should be measured simultaneously to more accurately assess blood pressure.

The principle of judging blood pressure by observing the beating of the mercury column is that during the slow deflation of the sphygmomanometer cuff, the fluctuation of the mercury column will correspond to the pressure changes caused by cardiac contraction and diastole. For specific operation, the cuff needs to be tied to the correct position of the arm, inflated to higher than the estimated systolic blood pressure (usually about 180 mmHg), and then slowly deflated, observing the "beating" of the mercury column and combining the sound of the stethoscope to determine the blood pressure value. The first time the mercury column is observed to beat significantly (or hear a "bang" sound), it is systolic blood pressure; when the beating disappears (or the sound weakens), it is diastolic blood pressure.