Anti-reflux remaining needle

Abstract

The invention discloses an anti-reflux remaining needle, comprising a remaining needle holder, a remaining flexible pipe, an extension pipe, an extension pipe seat and a liquid stopping clamp, wherein the liquid stopping clamp is arranged on the extension pipe; the extension pipe is connected between the extension pipe seat and the remaining needle holder; the extension pipe is a multi-cavity catheter which comprises at least two channels. According to the anti-reflux remaining needle, the structure of a multi-channel extension pipe is tactfully used, not only is the situation that a medical liquid dripping channel cannot be blocked in the infusion process sufficiently guaranteed, and the dripping speed and smoothness of medical liquid are guaranteed, but also a micro gap can be formed in the joint position between the outer wall and each separate inner wall of the extension pipe due to the fact that the multi-channel extension pipe is clamped through the liquid stopping clamp after the infusion operation is finished and paused every time, so that a microporous channel is formed by the micro gap between the extension pipe and the bottom part of the chamber of the remaining needle holder; a positive pressure chamber is formed through the upper part of the extension pipe and the extension pipe seat, therefore the blood reflux can be effectively and reliably prevented through slow penetration of the medical liquid, stored in the positive pressure chamber, via the microporous channel, and an anti-thrombotic purpose is achieved.

Description

technical field [0001] The invention relates to an indwelling needle and belongs to the technical field of medical instruments. Background technique [0002] Infusion can inject almost all medicinal liquid into the human body through blood vessels to achieve the purpose of treating and preventing diseases. In clinical practice, it has been widely used in order to avoid the damage of blood vessels caused by multiple punctures and reduce the pain of patients, as well as to reduce the operating intensity of medical staff. Indwelling needle (tube) technology. The clinically used indwelling needles generally include an indwelling needle base, an indwelling hose, an extension tube, an extension tube base, and a liquid stop clip installed on the extension tube. The extension tubes of the indwelling needles with this structure are all single-lumen catheters. , During the suspending process of infusion, by operating the liquid stop clip on the extension tube, the extension tube base...

AI Technical Summary

Problems solved by technology

But this patent application has the following defects: 1. the arrangement of the drainage tube and the drainage strip causes complex process and high manufacturing cost; Cause the blockage of the infusion channel of the drug solution, especially the drainage line made of hydrophilic material may have fibers falling off and dissolving in the cavity of the needle seat and the indwelling hose, causing the fiber foreign matter to enter the blood of the human body with the liquid, seriously endangering the human health

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