Quantity limited exhaust sheath

Abstract

The invention relates to a quantity limited exhaust sheath. The sheath is sleeved on a venous transfusion needle; an exhaust needle is placed at the bottom end of the sheath; one end of the exhaust needle is arranged in the middle of the sheath, and the other end of the exhaust needle is apart from the bottom end plane of the sheath; and the aperture of the exhaust needle is 5 to 50 silks. The sheath has the advantage of thoroughly fulfilling the purpose of preventing bubbles.

Description

technical field [0001] The invention relates to an infusion set, in particular to a sheath structure placed on an intravenous infusion needle in the infusion set. Background technique [0002] The existing clinical infusion sets are all composed of cork puncturer, catheter, dripping funnel, flow regulator and intravenous infusion needle, etc. When the above-mentioned infusion set is used initially, it is necessary to invert the dripping funnel or pinch the catheter In order to get rid of the excess gas, a series of operations, such as the form of the method, will cause a large amount of liquid and gas to mix and enter the downcomer to form bubble liquid, which will affect the infusion process. If it is not found due to negligence, it may cause harm to the human body or even be fatal. The operation in the process of getting rid of these air bubbles is cumbersome, reduces labor efficiency, and wastes liquid medicine simultaneously. [0003] Chinese Patent No. 200720076629.X, ...

AI Technical Summary

Problems solved by technology

[0005] During use, when the liquid passes through the cork piercer and the catheter to the dropping funnel, there are air bubbles or spaces in the above-mentioned pipeline, resulting in unstable liquid flow or impact flow, and the liquid accumulated in the dropping funnel will still have bubbles. Or gas-liquid mixture, these bubbles and gas-liquid mixture will flow into the downcomer from the notch of the anti-bubble tube with the liquid. There is a void formed, and as the liquid continues to flow out, the void will be filled with liquid, and the gas in the void will form bubbles and enter the downcomer with the liquid. Since the above situation occurs relatively late, the nurse takes up a lot of time in the process, which affects the entire During the infusion process, the liquid medicine is also wasted. If no air bubbles are found, it will cause fatal injury to the patient.

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