Automatic exhaust medicinal intravenous infusion set

Abstract

The invention discloses an automatic exhaust medicinal intravenous infusion set, which comprises a liquid inlet assembly, a dropping funnel, a liquid outlet assembly and a disposable intravenous injection needle which are connected in turn. A dropping funnel cover covers an opening of the dropping funnel in a sealing mode and a dropping tube and a liquid medicine injection part are arranged on the dropping funnel cover; and an automatic exhaust assembly is integrally arranged on the side wall of the dropping funnel and comprises a vent hole, a hole cover and a ventilated filtering membrane, wherein the vent hole is integrally molded with the side wall of the dropping funnel; the hole cover comprises a cap capable of opening and closing; and the ventilated filtering membrane is positioned between the hole cover and the contact surface of the vent hole and does not exhaust liquid but air. By ingeniously adopting a structure of integrally arranging the automatic exhaust assembly on the side wall of the dropping tube, the automatic exhaust medicinal intravenous infusion set has the advantages of effectively guaranteeing that the dropping funnel cover has the sealing performance of the conventional common intravenous injector, reducing the operating difficulty of medical care personnel, greatly reducing the probability of existing and accumulating air bubbles in an inner cavity of the dropping funnel, efficiently and reliably exhausting the air bubbles in the dropping funnel completely, fully guaranteeing the safety and reliability for infusion, along with simple structure, easy manufacture and high practicality.

Description

technical field [0001] The invention relates to a medical venous infusion set, in particular to a medical venous infusion set capable of automatic exhaust, belonging to the field of medical equipment. Background technique [0002] At present, the common infusion sets commonly used in the medical field are composed of a bottle stopper piercer protective cover, a bottle stopper piercer, a short infusion catheter, a short exhaust catheter, an air filter, an upper dropper, a drip funnel, a flow regulator, and a long infusion catheter. , liquid medicine filter and disposable intravenous infusion needle and other components. At the beginning of the infusion of ordinary infusion sets, the liquid medicine flows out from the dropper through the pipeline and enters the dripping funnel. The liquid easily discharges the gas in the dropping funnel downwards to form a gas-liquid mixture into the long infusion catheter, thus generating air bubbles. At the same time, Due to the surface ten...

AI Technical Summary

Problems solved by technology

At the beginning of the infusion of ordinary infusion sets, the liquid medicine flows out from the dropper through the pipeline and enters the dripping funnel. The liquid easily discharges the gas in the dropping funnel downwards to form a gas-liquid mixture into the long infusion catheter, thus generating air bubbles. At the same time, Due to the surface tension of the inner wall of the infusion catheter, the inner wall of the infusion catheter is easy to absorb a small amount of air bubbles, and the process of removing the resulting air bubbles is difficult, time-consuming and cumbersome. If the generated air bubbles enter the patient's body, it is easy to cause air embolism and other hazards

Therefore, before the infusion, the medical staff must manually drain the air bubbles in the catheter of the infusion set as much as possible. The usual method of artificial exhaust is: after inserting the cork puncturer into the infusion bottle stopper, first hang the dripping funnel upside down. At the same time, squeeze the dripping funnel by hand to make the medicine liquid enter the dripping funnel. After a certain amount of liquid is filled with the dropping funnel, most of the air bubbles can be removed. This process of manually removing air bubbles is cumbersome and time-consuming, which is not conducive to emergency Infusion and rescue of patients

In view of the above problems, Chinese patents CN101337098A and CN101708349A respectively disclose a kind of intravenous infusion set that can be automatically exhausted, both of which are provided with an exhaust pipe or an exhaust needle that can extend into the dripping funnel on the dripping funnel cover and are installed in the dripping funnel. The air filter membrane on the opening of the exhaust pipe or the exhaust needle is combined to realize the automatic exhaust of the dropping funnel, eliminating the cumbersome and time-consuming manual air bubble removal process, but these two patent applications are due to Both are provided with an exhaust pipe or an exhaust needle that can extend into the inner cavity of the dripping funnel on the dripping funnel cover. The trachea or exhaust needle not only affects the sealing performance and service life of the dripping funnel cover, but also makes the medical staff need to insert and connect multiple pipes in the narrow dripping funnel cover, which increases the difficulty of its operation; on the other hand, the extension The exhaust pipe or exhaust in the dropper has many blind spots for the effective discharge of air bubbles in the dropper. One is that the outer wall of the exhaust pipe or the exhaust needle is easy to absorb and there are bubbles that are difficult to discharge. It is also easy to form and accumulate air bubbles that are difficult to discharge between the tube or the exhaust needle and the inner wall of the drip funnel, which may cause a small amount of air bubbles to enter the infusion set and affect the safety and reliability of intravenous injection; The exhaust pipe or exhaust needle in the bucket will affect the observation of the infusion of the dropper by the medical staff, which in turn will affect the detection and judgment of the infusion pump on the drop count of the dropper

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