Infusion drop rate automatic control device

Abstract

The invention discloses an automatic control device of transfusion dripping speed, which comprises a controller unit, a dripping speed signal generating unit, a man-machine interface unit, a drippingspeed control unit, and an alarm unit; the control unit compares the automatically detected transfusion dripping speed with a setting value of the transfusion dripping speed; the stepping motor is controlled so that the pipe diameter of the dripping pipe is changed, the transfusion dripping speed is stable; when the transfusion drip exceeds the upper limit value or the lower limit value, the automatic control device can automatically call an alarm. The dripping speed signal generating unit can automatically filter the narrow impulse disturbance in the output impulse of a photoelectric detection module; the effect of filtering disturbance impulse can be adjusted by adjusting the upper limit amplitude of the limited amplitude accumulated counting value in the dripping speed signal generatingunit, or changing the comparative threshold values of upper and lower limits.

Description

technical field [0001] The invention relates to the field of medical auxiliary equipment, in particular to an automatic control device for infusion dripping speed. Background technique [0002] Infusion is one of the most basic medical methods. In the process of treating patients with infusion, it is necessary to select the appropriate drip rate of intravenous infusion according to the medicine infused and the patient's condition. At present, the monitoring of intravenous infusion generally adopts a manual method, and the nurse adjusts the speed to an appropriate value according to experience. When the liquid is infused and the dressing is not changed or the needle is pulled out in time, or the needle moves, the infusion tube is bent, etc., the dripping speed of the infusion will change, and even cause air to enter the blood vessel to form an air embolism, blood coagulation and block the needle, etc. For this reason, nurses or patients' family members need to constantly obs...

AI Technical Summary

Problems solved by technology

Since the shape of the droplet is not fixed, and the Murphy dropper is easily affected by pulling, the electric pulse signal output by the photoelectric detection module has interference narrow pulses, especially at the front and rear edges of the droplet electric pulse. Jitter interference pulses , resulting in a decrease in the accuracy of infusion drip velocity detection

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