A needle for indwelling which prevents blood reflux
By introducing a three-flap sealing plate and drainage ball structure into the indwelling needle, the problems of blockage and thrombosis caused by blood reflux are solved, achieving the optimal use and safety of the indwelling needle and simplifying the operation process.
CN122097749APending Publication Date: 2026-05-29CHANGDE FIRST PEOPLES HOSPITAL
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGDE FIRST PEOPLES HOSPITAL
- Filing Date
- 2026-03-26
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
During use, blood can easily flow back into the indwelling needle, leading to needle blockage and thrombosis, which can affect the administration of intravenous medications. In addition, the frequent replacement of the heparin cap is inconvenient.
Method used
An indwelling needle designed to prevent blood backflow employs a three-lobed sealing plate and a drainage ball structure. Through the interaction between the three-lobed sealing plate and the drainage ball, the medication and blood are separated and sealed to prevent backflow.
Benefits of technology
It effectively prevents blood backflow, avoids needle blockage and thrombosis, improves the service life and safety of indwelling needles, and simplifies the use of heparin caps.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122097749A_ABST
Abstract
The application relates to the technical field of indwelling needles, and discloses an indwining needle capable of preventing blood backflow, which comprises a venous tube, a filling pipeline fixedly connected to the top of the venous tube, a hose fixedly connected to the outside of the filling pipeline, a mixed liquid tube fixedly connected to one end of the hose, a transfusion tube fixedly connected to one end of the mixed liquid tube, a heparin cap fixedly connected to the other end of the mixed liquid tube, a drainage ball movably connected between the filling pipeline and the hose, and second anastomosis walls for anastomosing the drainage ball formed by the concave shapes of the two sides of the replacement ring, a drainage hole arranged on the drainage ball, the filling pipeline communicated with the hose through the drainage hole, and a three-labium sealing plate movably connected to the inside of the filling pipeline. The indwining needle capable of preventing blood backflow is characterized in that blood in the hose flows into the inside of the filling pipeline, and when the liquid level in the inside of the filling pipeline drops, the three-labium sealing plate slowly drops to re-contact the drainage ball, so that the channel between the filling pipeline and the hose is closed, thereby preventing the possibility of blood backflow in the pipeline.
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