In medical diagnosis, non-invasive blood pressure measurement has evolved from traditional sphygmomanometer measurement to multi-parameter vital signs monitors and automatic blood pressure gauges. Because of its simple operation, fast, accurate, timing, memory storage data and other functional characteristics, it not only reduces the intensity of the work of medical personnel, but also makes the medical means modern and scientific. As the core component of automatic blood pressure measuring instrument, pressure sensor is an important part to convert pressure signal into electrical signal, and its quality will directly affect the measurement result. At present, most of the pressure sensors used by manufacturers are solid state piezoresistive sensors.
A medical pressure sensor is a sophisticated device that makes the related medical devices manufactured with it more accurate and expensive. Because the elastic strain of the pressure sensor has a certain limit, special attention is needed when using it. Do not apply excessive pressure, which will cause the strain to exceed its maximum value and cause damage. Although the general monitor or automatic blood pressure measuring instrument has an overpressure protection device, the sensor damage caused by improper human operation cannot be ignored. (1) When the air pump is full, do not pinch the cuff. (2) When the air is not finished, do not break the cuff. Because the cuff injury results in a surge of pressure in the airway, which can damage the sensor.
Sensor damage will appear on some instruments, the main prompt is that there is a problem with the pressure channel, at this time should check the pressure sensor, when the pressure sensor has a problem, some instruments do not have any prompt. Display only inaccurate measurement data, if this is the case should also focus on the pressure sensor.
