Tunnel film type sensitive blood-back vena needle

Abstract

A tube file type sensitive blood returning intravenous needle is characterized by including a blood returning tee (1), an elastic film (8), a protective cover (9), and an intravenous needle pipeline (3), wherein the blood returning tee (1) is fixedly with the intravenous needle pipeline (3) at the exit, a concave inward interface (13) arranged at the inlet, the side port is sealed by the elastic film (8), the blood returning tee (1) forms an independent whole structure with the intravenous needle (2) and the pipeline thereof. The middle of the blood returning tee (1) is a blood returning tube (18), and the side port is rectangle, while the transect is of tube shape. The elastic film (8) is blocked at the rectangle opening from the outside; the blood returning tube (18) and the elastic film (8) are combined to form a pipe, wherein the two copulaes are not fixed and sealed. The device realizes the fast and expedite fluid stable flow, and does not generate air stockpile problems and time resort, also due to adopting the film type elastic film induction blood vessel pressure, the more sensitive blood returning assistant judgment function is realized, meanwhile can be matched stochastically and flexibly or used independently.

Description

Technical field [0001] The invention relates to a disposable infusion set in medical equipment, in particular to a tunnel membrane-type sensitive blood returning venous needle. The tunnel-shaped blood returning device is manufactured as a whole with the venous needle and the pipeline, which can be smoothly and timely when preparing for infusion Make the liquid flow through the pipeline the fastest without forming turbulence, gas retention, and gas stop during infusion. In addition, it also improves the flexibility of product use and the diversity of supporting equipment, and at the same time realizes more sensitive in the preparation of gravity infusion The blood return auxiliary judgment function can more accurately complete the active judgment of the position of the needle, and minimize the interference of human inexperience, poor human blood vessel conditions or low blood volume. technical background [0002] The purpose of the present invention is to provide a tunnel membrane...

AI Technical Summary

Problems solved by technology

[0003] The existing technology includes the problems in the design of the "direct membrane temperature sensitive blood return self-venting infusion filter" invented by myself with the patent application number 200510276096. The blood return cavity in the filter with blood return function is a cavity with an inner diameter larger than the inner diameter of the infusion line. The liquid flows through here in the form of eddy currents, and there is often accumulated gas that is difficult to remove. The circuit is fixedly connected, and cannot be flexibly decomposed and selected, resulting in unfavorable clinical use. In addition, because the blood return device and other functional structures are designed as a whole, it can only be used in combination and fixedly, and cannot be flexibly operated separately.

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