Anti-clogging medicine adding needle

By incorporating an injection hole and a slit in the soft rubber sleeve into the needle design to prevent clogging, the problem of microparticles entering the drug solution caused by planing the rubber stopper with a beveled needle is solved, achieving efficient, pollution-free drug delivery and improved safety.

CN224540614UActive Publication Date: 2026-07-24PEKING UNIVERSITY SHENZHEN HOSPITAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
PEKING UNIVERSITY SHENZHEN HOSPITAL
Filing Date
2025-04-24
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The beveled design of existing syringe needles can easily abrade the rubber when puncturing rubber stoppers, causing microparticles to enter the drug solution and posing clinical risks.

Method used

A clog-resistant dosing needle is designed, which features an injection port at the proximal end of the needle tube and is sealed with a soft rubber sleeve. The soft rubber sleeve has slits to expand and open the injection port under pressure. Combined with a symmetrical needle tip section and annular groove design, this design ensures smooth drug delivery and prevents rubber particles from falling off.

Benefits of technology

It effectively prevents rubber particles from entering the drug solution, improves injection safety and reliability, ensures uncontaminated drug delivery, and has a simple and reliable structure.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of anti-blocking medicine adding needle, including needle seat, needle tube and soft rubber sleeve tube, needle tube has proximal end and distal end, proximal end has needle tip, and the peripheral wall of proximal end is equipped with injection suction hole, distal end is fixed on needle seat;Soft rubber sleeve tube is covered on needle tube and at least covers proximal end, to close injection suction hole, slit on soft rubber sleeve tube, slit is opposite to injection suction hole, and when anti-blocking medicine adding needle is injected with liquid medicine, slit is forced to expand to open injection suction hole.The utility model discloses an anti-blocking medicine adding needle, by setting injection suction hole in the peripheral wall of needle tube proximal end, and using soft rubber sleeve tube to close it, then slit is set on soft rubber sleeve tube, so that slit opens injection suction hole when injecting liquid medicine with pressure expansion, to effectively prevent rubber particle drop caused by planing effect when puncturing rubber plug, avoid the clinical risk possibly brought by microparticle into medicine, simultaneously ensure that liquid medicine is efficiently, pollution-free delivery, significantly improve the safety and reliability of injection, and, simple and reliable structure.
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