A method for placing and fixing a total colonic catheter

By designing a total colonic indwelling catheter with a sliding coil and a fixed coil, the problems of intestinal curvature and length limitations were solved, achieving safe fixation and drug delivery in the ascending colon, and enabling long-term indwelling and repeated drug administration.

CN115531684BActive Publication Date: 2025-12-02WUXI NO 2 PEOPLES HOSPITAL
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Patent Information

Application Number
CN202211309874.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-25
Publication Date
2025-12-02
Estimated Expiration
2042-10-25

AI Technical Summary

Technical Problem

Existing intestinal catheters are difficult to safely and smoothly reach and fix in the ascending colon, making long-term placement and repeated drug administration impossible, especially due to the tortuosity and length limitations of the intestine.

Method used

A total colonic catheter was designed, which uses a sliding semi-circular coil and a fixed coil combined with a soft tissue clamp. The catheter is fixed to the intestinal wall with the help of an endoscope, and drugs are injected through the end of the catheter. Multiple side holes and outlet holes are used to achieve drug delivery.

Benefits of technology

This method achieves long-term fixation of the catheter in the ascending colon and safe and smooth drug delivery, enabling long-term placement and repeated drug administration.

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Abstract

A total colonic catheter includes a hollow catheter with one closed arc-shaped end and an open end. Multiple sets of thread holes are formed on the outer wall of the catheter, and a fixing thread is wound through each set of thread holes. The fixing threads are connected end-to-end to form at least one slidable semi-circular coil. This device is used in conjunction with the soft tissue clamp of a colonoscope, allowing the catheter to be inserted and fixed at any point in the entire colon. Near one end of the catheter, a side hole for drug outflow is provided, and the other end is connected to a syringe interface. This device allows for the smooth and safe delivery of medication to the ascending colon in conjunction with an endoscope, and permanently fixes the catheter to the inner wall of the ascending colon, achieving long-term placement and repeated drug administration.
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Citation Information

Patent Citations

  • Middle digestive tract implanted tube instrument and rapid implantation method thereof

    CN108324575A

  • Total-colon perfusion indwelling catheter and fixing method thereof

    CN109364320A