The traditional cuff non-invasive electronic sphygmomanometer mainly adopts the step-down measurement. The sphygmomanometer uses an air pump to quickly inflate the cuff to a certain air pressure value, and uses the inflatable cuff to compress the arterial blood vessels, so that the arterial blood vessels are completely blocked. state, and then deflate at a speed through a constant-speed exhaust valve. As the pressure in the cuff decreases, the arterial blood vessels show a change process of complete blocking - gradually opening - fully opening , and blood pressure measurement is performed during this deflation process. The disadvantage is that the user's arm (or wrist) has obvious pressure, and the measurement results are sometimes unstable due to the instability of the fixed-speed exhaust valve and the patient's psychology.
Different from the step-down measurement method, the step-up measurement method does not rapidly pressurize to a high level. When the cuff pressure rises, the arterial blood vessels show a change process of fully open -semi-closed-completely closed . Boost-type measurement measures blood pressure during the pressurization process, so that the user will not feel the obvious pressure on the arm. After the measurement is completed, open the solenoid valve to vent the air to realize a measurement process. The boosted measurement solves the problem of arm (or wrist) compression, and the user's comfort is improved during the measurement process. Blood pressure measurement is also greatly reduced by psychological factors,
In this way, the blood pressure value measured is more stable and accurate.
Post time: Nov-10-2022
