Intravenous infusion set capable of exhausting air automatically

Abstract

The invention discloses an intravenous infusion set capable of exhausting air automatically, which comprises a liquid inlet component, a drip chamber, a liquid outlet component and a disposable intravenous infusion needle, which are connected in turn, wherein the upper opening of the drip chamber is provided with a drip chamber cover; a drip tube extending into the drip chamber and a medicinal liquid injection piece for adding medicinal liquid are arranged on the drip chamber cover; at least one air guide cavity is formed on the upper part of the side wall of the drip chamber integrally; the bottoms of the air guide cavities are communicated with the inner cavity of the drip chamber; devices above the air guide cavities have hole covers; and breathable filter members, which can exhaust air, but not discharge liquid, are arranged between the hole covers and the air guide cavities. In the invention, due to the smart adoption of the at least one air guide cavity formed on the upper part of the side wall of the drip chamber integrally, the caliber is big enough and the radial distance is long enough for water drops to fall down and flow out to ensure the reliability of secondary air exhaust; and the same kind of material avoids shielding, and the dripping speed can be observed reliably.

Description

technical field [0001] The invention relates to a medical venous infusion set, in particular to an automatic exhaust venous infusion set, which belongs to the field of medical equipment. Background technique [0002] At present, the common infusion set commonly used in the medical field consists of a bottle stopper piercer protective cover, a bottle stopper piercer, an infusion upper catheter, an exhaust catheter, an air filter, an upper dropper, a drip funnel, a flow regulator, an infusion lower catheter, It consists of liquid medicine filter, 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 lower infusion catheter, thus generating air bubbles. At the same time, Due to the surface tension of the in...

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 lower 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 All of them are provided with an exhaust pipe or an exhaust needle that can extend into the inner cavity of the drip funnel on the cover of the drip funnel. Due to the small diameter of the exhaust pipe or the exhaust needle, it will be adhered by the surface tension of the liquid in the drip funnel. Water droplets will block the mouth of the tube or the needle hole, which will affect the second automatic exhaust, and the exhaust pipe extending into the dropping funnel and the dropping funnel are two different materials, which will affect the observation of the infusion speed. At the same time, due to The ring frame for fixing the water-permeable and air-impermeable water-permeable filter membrane is directly installed into the dripping funnel from the opening above the dripping funnel. The ring frame is difficult to position accurately and is prone to tilting, resulting in low production efficiency, prone to defective products, and high cost. Moreover, the ring frame and the dripping funnel that fix the water-permeable and air-tight filter membrane are two different materials, and their expansion coefficients are different. There is a gap between the inner wall of the drip funnel and the ring frame, which affects the water-permeable and air-tight water-permeable filter membrane. Tightness with dripping funnel

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