Catheter leading-in device

Abstract

The invention relates to a catheter leading-in device which comprises a needle core. An inner needle tube externally sleeves the needle core, an outer needle tube externally sleeves the inner needle tube, the needle core is of a solid structure, the tail end of the needle core is fixedly connected with a handle, the inner needle tube is of a hollow structure, a first reducing section is arranged on the right side of the inner needle tube, a flange matched with the handle is arranged at the tail of the first reducing section, the outer needle tube is of a non-closed hollow structure with side seams, two ribs are arranged on the outer needle tube, and one end of the outer needle tube close to the ribs is of a flared structure. The device is applicable to various puncture drainage and shunt operations, and a catheter can be accurately and conveniently led into a target lacuna without restrictions such as excessive length of the catheter, fixed embedment of a far end of the catheter and caliber change of the catheter.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a catheter introducing device. Background technique [0002] In clinical work, it is sometimes necessary to introduce catheters into body cavities or gaps for drainage, shunting or drug perfusion. Currently, two methods are used: [0003] 1. Anatomical separation method: cut each layer of structure directly to the body cavity or target cavity, and put the catheter under direct vision. This method has a large trauma and poor airtightness, which is prone to leakage and other situations, and has a high probability of complications; [0004] 2. Puncture and guide wire-guided catheterization method: similar to Seldinger's method is often used in clinical practice: after the puncture needle is successfully punctured, the guide wire is introduced through the puncture needle cavity, the puncture needle is withdrawn along the guide wire, and the tail end of the guide wire is inserted into ...

AI Technical Summary

Problems solved by technology

This method has the following defects: a. The guide wire must be withdrawn through the catheter, and this method cannot be used if the tail end of the catheter has been connected and fixed with other accessories, embedded and fixed

[0006] 1. During the puncture process, the tracking of the ostomy tube is poor, and it is difficult to synchronize with the puncture needle. For the target cavity that is huge, and the thickness of the tissue wall through the puncture is not very large, the ostomy needle can barely be used to stretch the tissue with the help of forceps. 1. If the target cavity is relatively small or the operation requires high precision, the ostomy needle cannot be used;

[0007] 2. It is difficult to accurately and timely judge whether to enter the target cavity;

[0008] 3. It cannot be reused, once opened, it cannot be used again

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