Central vein puncture trocar

Abstract

The invention provides a central vein puncture trocar, relating to central vein puncture cathetering. The central vein puncture trocar is provided with an outer guide needle, a central vein catheter,a guide steel wire, an injection syringe and a heparin cap, wherein a needle tube of the outer guide needle is composed of two hollow half cylinders, lock catches are arranged at the needle tails of the two hollow half cylinders, and clamping grooves are arranged at the needle points of the two hollow half cylinders; the central vein catheter is arranged in the outer guide needle, the injection syringe is connected outside a side pipe of the central vein catheter, and a main pipe of the central vein catheter is connected with the heparin cap; the guide steel wire is arranged in the main pipe of the central vein catheter, the tail end of the guide steel wire penetrates through the heparin cap and is fixed with the heparin cap, and the guide steel wire can advance and retreat through the effect of external force.

Description

technical field [0001] The invention relates to a central venous puncture tube, in particular to a central venous puncture trocar. Background technique [0002] Central venous catheterization technology has been in clinical use for more than 40 years. The traditional method of catheterization is to first locate the guide needle, insert the guide wire, withdraw the guide needle and replace it with a skin expansion needle, and then insert the central vein. catheter etc. at least 4 steps. Studies have shown that 1 / 4 of puncture failures occur during the insertion of the guide wire and subsequent steps. The steps are cumbersome, the operability is poor, and it takes a long time, especially when rescuing patients, this method seems inappropriate. [0003] Chinese patent CN 204684358 U discloses a Y-shaped connector and a tube for a central venous puncture trocar. In order to solve the above technical problems, it includes a main connecting tube and a guide wire tube. The two e...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of cumbersome central venous catheterization steps, poor operability and long time consumption, and provide a central venous puncture trocar that can solve the steps of inserting a guide wire and inserting a central venous catheter in one puncture

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