A catheter introduction device

Abstract

The invention relates to a catheter introduction device, comprising a needle core, an inner needle tube is covered with the needle core, and an outer needle tube is covered with the inner needle tube; the needle core has a solid structure, and the tail end of the needle core is fixedly connected with a handle; the inner needle tube is a hollow structure, The right side of the inner needle tube is provided with a first variable diameter section, and the tail of the first variable diameter section is provided with a flange adapted to the handle; the outer needle tube is a non-closed hollow structure with side seams, and the outer needle tube Two fins are arranged on the needle tube, and the end of the outer needle tube close to the fins has a bell mouth structure. The device is suitable for a variety of puncture drainage and shunt operations; it can accurately and conveniently guide the catheter into the target cavity, and is not limited by the length of the catheter, the embedded and fixed distal end of the catheter, and the change in the diameter 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is successfully punctured, the guide wire is introduced through the puncture needle cavity, the puncture needle is withdrawn along the guide wire, and the tail end of the guide wire is inserted into ...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This method has the following defects: a. The guide wire must be withdrawn through the catheter, and this method cannot be used if the tail end of the catheter has been connected and fixed with other accessories, embedded and fixed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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