Anti-stick needle for indwelling

By rotating the lever to drive the threaded needle to retract, and using the slot and sealing ring for guidance, the problem of needle core jamming and scratching during the withdrawal of traditional indwelling needles is solved, realizing safe and comfortable withdrawal of indwelling needles and reducing the risks to patients and medical staff.

CN224370368UActive Publication Date: 2026-06-19CHENGDU XINJIN SHIFENG MEDICAL APP ANDINSTR CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHENGDU XINJIN SHIFENG MEDICAL APP ANDINSTR CO LTD
Filing Date
2025-06-16
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

When withdrawing the needle core of a traditional indwelling needle, it is difficult to precisely control the direction and speed of force application, which can easily lead to the needle core getting stuck or suddenly dislodging, increasing the risk of vascular damage to patients and needlestick injuries to medical staff.

Method used

The needle retraction is achieved by using a rotating paddle to drive the threaded rotation, a groove to limit the rotation ring's offset, and a sealing ring to guide the puncture needle to retract linearly at a uniform speed. The rotational force is converted into precise translation through thread engagement, ensuring the smoothness and safety of the needle retraction process.

Benefits of technology

This method enables the needle to be withdrawn smoothly and at a constant speed throughout the procedure, avoiding the risks of jamming and scratching the inner wall of blood vessels, reducing patient pain and the risk of needlestick injuries to medical staff, and improving the safety and comfort of the procedure.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224370368U_ABST
    Figure CN224370368U_ABST
Patent Text Reader

Abstract

This utility model discloses an anti-puncture indwelling needle, relating to the field of indwelling needle technology. It includes a cannula seat and a protective sleeve. A needle tube is fixedly connected to the front end of the cannula seat, and a puncture needle is slidably connected to the inner side of the needle tube, with the needle tip protruding outside the needle tube. A threaded rod is fixedly connected to the other end of the puncture needle. A rotating ring is slidably connected between the cannula seat and the protective sleeve, and a translation mechanism is installed between the inner side of the rotating ring and the outer side of the threaded rod. This device drives the threaded rod to rotate and retract the needle by rotating a paddle, uses a groove to limit the rotation of the rotating ring, and combines a sealing ring to guide the puncture needle to retract linearly at a uniform speed. The threaded engagement converts the rotational force into precise translation, eliminating the risk of needle jamming or blood vessel damage associated with traditional needle withdrawal methods. The entire withdrawal process is smooth, safe, and comfortable.
Need to check novelty before this filing date? Find Prior Art