Alarm for finishing infusion

Abstract

The invention discloses an alarm device of the termination of transfusion. The invention consists of two metal clip electrodes and a circuit. The first metal clip clamps the exposed part of a transfusion needle and is led out to be connected with one end of a capacitance-voltage transformation module by a guide wire, so as to form one electrode of a capacitance sensor; the second metal clip clamps a drip tube of the transfusion needle and is led out to be connected with the other end of the capacitance-voltage transformation module by the other guide wire, so as to form the other electrode ofthe capacitance sensor, further to constitute the capacitance sensor. The invention makes use of the electrical conductivity of liquid medicine to make the variable-polar distance capacitance sensor;when in transfusion process till the end of the transfusion, the media in the drip tube changes from liquid medicine to air, the distance between the first electrode and the media is rapidly increased and the capacitance changes correspondingly. Therefore, the capacitance sensor can cause great change of capacitance at the end of transfusion; the collected capacitance signal is input into a detection circuit through the guide wire, and then the invention can emit sound and light alarm. The invention adopts the non-contact capacitance sensor to collect the signal of the termination of transfusion, and the invention has accurate signal collection, stability, reliability and strong interference resistance.

Description

technical field [0001] The invention relates to a device for injecting a medium into a human body, in particular to an alarm device for the end of transfusion. Background technique [0002] A large number of patients receive infusion therapy every day in various hospitals at all levels. The end of the infusion must be dealt with in time - pull out the needle or change the dressing, otherwise it will cause adverse consequences such as "blood return". Therefore, medical staff and patients are required during the infusion process. The continuous monitoring of family members has caused great psychological pressure on doctors and patients. The timely processing of the end of the infusion depends on the timely acquisition of the information of the end of the infusion. At present, there are two methods: one is that the nurses set the flow rate of the liquid medicine in advance, estimate the required infusion time and then supplement it with continuous patrol inspection; the other ...

AI Technical Summary

Problems solved by technology

Since it usually takes more than 1.5 hours to infuse a bottle of 500ml liquid medicine, it is not only unfavorable for the patient to recuperate, but also an unreasonable burden for the accompanying staff to observe the progress of the infusion for a long time.

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