Catheter tip shaping structure of venous indwelling needle

Abstract

The invention discloses a catheter tip shaping structure of a venous indwelling needle. The catheter tip shaping structure comprises a venous indwelling needle tube and a transparent indwelling catheter, and a blood return hole and a blood transfusion channel are formed in the venous indwelling needle tube; a first cylindrical channel, a circular truncated cone channel and a second cylindrical channel are sequentially formed in the transparent indwelling catheter which is matched with the venous indwelling needle tube in use, the outer edge extending line of the circular truncated cone channel is intersected with the outer edge extending line of the first cylindrical channel to form an included angle alpha of 1-8 degrees, and a blood return cavity is formed after the venous indwelling needle tube and the transparent indwelling catheter are matched in use, the blood return cavity is communicated with the blood return hole so that medical workers can quickly and clearly see the returning blood, and medical negligence is avoided. Moreover, a first circular truncated cone and a second circular truncated cone are arranged at the top of the transparent catheter, and completely matched with the needle tube, the successful puncture rate is improved, and the situation that the catheter is split and rolled during puncture, and accordingly puncture is failed is avoided; the catheter tip shaping structure is simple, good in use effect, convenient to operate and beneficial to market promotion.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a catheter tip forming structure of an intravenous indwelling needle. Background technique [0002] At present, the lumen of the transparent indwelling catheter for medical intravenous injection is a vertebral body with a small angle. The angle is very small, so the space between the outer wall of the intravenous indwelling needle tube and the lumen of the transparent indwelling catheter is very narrow, the blood return is very slow, the amount of blood return is very small, and even the medical staff cannot see the return of blood at all. It may stab the patient when pushing the needle forward. Piercing blood vessels, causing medical malpractice. Contents of the invention [0003] The purpose of the present invention is to provide a catheter tip forming structure of an intravenous indwelling needle that can quickly and clearly see the blood return, and the blood return is fas...

AI Technical Summary

Problems solved by technology

[0002] At present, the lumen of the transparent indwelling catheter for medical intravenous injection is a vertebral body with a small angle. The angle is very small, so the space between the outer wall of the intravenous indwelling needle tube and the lumen of the transparent indwelling catheter is very narrow, the blood return is very slow, the amount of blood return is very small, and even the medical staff cannot see the return of blood at all. It may stab the patient when pushing the needle forward. Perforated blood vessels, causing medical accidents

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