Sound or vibration transfusion sensor

Abstract

A voice or vibration sensor for sensing the liquid dropping signal of perfusion has at least two clamps with arc recess matched with the perfusion tube. A sound-picking up hole is made on said arc recess. An extended sound picking-up tube with a sound picking-up or vibration unit at is tail is arranged at the sound-picking up hole for picking up the vibration caused by liquid dropping and converting it to electric signal.

Description

Technical field [0001] The invention relates to a sensor for a transfusion monitor, in particular, it is a sound or vibration transfusion sensor, which is mainly used for collecting transfusion droplet signals. Background technique [0002] In the prior art, infusion controllers generally adopt photoelectric sensors, such as Chinese patent ZL03218560. The main function of the photoelectric sensor is liquid level sensing, which gives a signal of "presence or absence" of the liquid medicine. This signal can only be used for stop control after the infusion is completed, and cannot be used for drip rate monitoring during the infusion process. However, drip rate monitoring is very important. If the drip speed monitoring is to be completed, the droplet signal must be collected. To complete this function, the photoelectric sensor must be installed on the Murphy tube, which will inevitably form a block to the Murphy tube and affect the naked eye's perception of the drip speed. Obs...

AI Technical Summary

Problems solved by technology

Although this sensor can complete the collection of droplet signals, there are relatively large disadvantages in its structure. One is to occupy the dosing port of Murphy's tube, so that the dosing port must be changed or another dosing port is set, which changes the original once. The structure of the disposable infusion set destroys the habit of use, which is not acceptable to users. Second, if the lumen is connected to the sensor air bag, so that the sensor is in direct contact with the liquid cavity of the disposable infusion set, the air bag must also be made once. In this way, the airbag must be replaced by the user. If the disassembly and installation structure of the airbag cannot ensure the accuracy of the repeated installation position of the airbag, the sensitivity of the sensor will be affected, which not only brings trouble to the user, but also destroys the use of the user. At the same time, it is more difficult to implement structurally. Therefore, although the patent realizes the collection of droplet signals, it is difficult to be practically popularized and applied due to the above reasons.

Images