What Are the Applications of Pressure Sensors in Infusion Pumps?
In medical equipment, the infusion pump is an injection device used to precisely control the infusion rate to ensure that the drug can enter the human vein evenly, accurately, and safely. In this device, pressure sensors, especially miniature touch force sensor chips, are widely used.
Among the common medical equipment in hospitals, a typical infusion pump is a screw pump that acts on a syringe or an infusion cylinder to deliver a small amount of medicinal liquid into a patient's vein.
Compared with the traditional manual management of intravenous injection speed and process, the infusion pump controls the drug injection speed more accurately and stably and needs to monitor the infusion process, which greatly reduces the number of manual operations. Below we introduce the application and function of the pressure sensor in the infusion pump for your reference.
Application of pressure sensor
In order to achieve precise control and condition monitoring of the injection process, and improve the comfort of patient treatment, a variety of sensors are often used in infusion pumps, including force sensors using pressure sensor technology, infrared sensors, and Hall effect position.
Among them, in the infusion pump, the non-contact, compact hall sensor is used for magnetic position detection, which can provide accurate position detection for the infusion pump motor, so as to ensure the smoothness of the motor rotation and reduce the damage caused by the motor rotation.
Another example, flexible heating sheets can be used in infusion pumps that need to be heated to improve the comfort of patients during infusion. Especially when the temperature of the liquid in the infusion tube is low, some flexible heating sheet products can also prevent excessive heating and ensure the safety of patients.
The functions of the pressure sensor
At present, in the infusion pump, the pressure sensor has two main functions. The first is to monitor the pressure state of the infusion tube wall. When the infusion pump is blocked due to other reasons, the pressure sensor can accurately detect the pressure change to issue an alarm message. In addition, the pressure sensor can also be used to measure the pressure of the liquid in the infusion tube, so as to measure and control the flow rate of the liquid.
The contact force sensor used in the infusion pump is used to measure the increase or decrease of the contact force. When the silicon varistor is bent by an external force, the resistance increases. The sensor transmits the contact force directly to the silicon sensing element through the stainless steel pull plug, and the resistance value changes correspondingly according to the size of the contact force, and this resistance change causes the sensor to output a certain electrical signal. In actual selection, a smaller total error band and a touch force sensor with temperature compensation and calibration are often selected to improve the detection accuracy.
If you want to know more about infusion pumps after reading the above, please continue to pay attention to our news.
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