Novel infusion pump technology

Abstract

The invention discloses a novel infusion pump technology. According to an infusion drop number monitoring technology ( with the application umber of 201210015144.5), each infusion drop is monitored in real time accurately, and shaping and delivering of each infusion drop are controlled by a simple and convenient on-and-off process. Particularly, an infusion tube is turned on when an infusion drop is needed to be delivered, then is turned off immediately after shaping and delivering of the infusion drop are monitored, and thus stable infusion is realized since a series of infusion drops of the same volume are delivered periodically. An infusion pump adopting the novel infusion pump technology is adaptable to national conditions, can be used with an economical disposable gravity infusion apparatus to realize high injection precision and long-term stability in infusion, has low requirements for elasticity and toughness of the infusion tube and the like, is low in cost and volume power consumption and can be clamped on the infusion apparatus directly, accordingly, defects that infusion precision is unstable, deviation of an infusion needle is caused, volume power consumption is high, microparticles on walls of the infusion tube are easy to be squeezed to drop off to contaminate liquid medicine, and the like are overcome.

Description

technical field [0001] The invention relates to the field of electronic medical technology, in particular to a novel infusion pump technology. Background technique [0002] Intravenous infusion is a widely used medical method. Many special patients such as the elderly, children, physically weak, cardiovascular patients, lung patients, and many special medicinal liquids have strict requirements on the infusion speed. That is, it is necessary to maintain a constant and stable infusion rate. When ordinary gravity infusion cannot meet this requirement, an infusion pump or a syringe pump must be used. [0003] All over the world, the existing infusion pumps basically use peristaltic extrusion technology, that is, through a set of mechanical extrusion fingers, the infusion softness of the infusion set is periodically squeezed according to a certain strength, amplitude, and rhythm. A certain volume of liquid medicine is output every time it is squeezed one round, so as to achieve ...

AI Technical Summary

Problems solved by technology

[0004] Due to the special national conditions, medical institutions in my country cannot and dare not use extremely expensive special infusion sets on infusion pumps, but can only use ordinary disposable gravity infusion sets in disguise, which has formed a series of defects and hidden dangers. The biggest defect is that the infusion tube of the disposable gravity infusion set has poor elasticity and toughness, and will lose its elasticity after being slightly squeezed and kneaded for a period of time, which will greatly reduce the infusion accuracy of the infusion pump

[0005] In order to make up for the above-mentioned defects, a small number of infusion pumps have added an infrared drop sensor to the infusion set dripping funnel to measure the actual drip speed, and use it for closed-loop control to correct the drop in the accuracy of the infusion pump, but this has introduced two new hidden dangers : First of all, will there be potential harmful effects on the microscopic physical and chemical structure of the liquid medicine when irradiated with high-intensity infrared rays? This is an inconclusive suspense in the medical field; secondly, using infrared rays to detect liquid droplets is very afraid of the tilting of the dripping funnel. Once the dripping funnel is tilted too much, the liquid droplets will not pass through the optical measurement channel but directly fall into the dripping funnel. On the side wall, this can cause missed detection and make the infusion pump mistakenly think that the actual speed has dropped and increase the infusion speed, which will be very dangerous

[0006] Another risk of using a disposable gravity infusion set with an infusion pump is that it is difficult to predict and prevent needle runaway, which is the most common accident in infusion (especially for the elderly and children). When a needle runaway occurs, the infusion pump Generally, it is perfused into the human body at a predetermined speed, which can easily cause necrosis of the muscle tissue, nerve tissue, and bone tissue around the vein.

[0007] Because disposable gravity infusion sets are generally made of economical and cheap PVC and other materials, when the infusion pump squeezes and rubs it with a large area, high strength, and high frequency, the particulate impurities on the inner wall of the infusion set hose are easy to Peel off and pollute the liquid medicine, causing irreversible damage to the patient's lungs and microcirculation system

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