Self-sealing type venous indwelling needle and production method thereof

Abstract

The invention relates to a self-sealing type venous indwelling needle and a production method thereof. The self-sealing venous indwelling needle is composed of an indwelling guide tube 1, an as-received basis bladder tube 2, an infusion tube cavity 3, a needle point groove 4, a flexible connecting tube 5, a pressurization block 6, a pressure proof bladder 7, a lock catch 8, a needle seat 9, a steel needle core 10 and a steel core isolating plug 11. The as-received basis bladder tube 2 of the self-sealing type venous indwelling needle enters into the needle seat 9 through the steel core isolating plug 11, the continuity and completeness of the guide tube are maintained, an as-received basis bladder, the steel needle core and the steel core isolating plug can be installed automatically, it is avoided that an openings is formed in the side wall of the indwelling guide tube or in the needle seat for installing the as-received basis bladder tube, complex and petty procedures are omitted, and the welding or bonding at the guide tube or at the needle seat is omitted; by means of a C-shaped groove structure of the steel needle core, it is convenient to contain and convey the as-received basis bladder tube to reach the tip of the as-received basis bladder tube, the steel needle core can be drawn out easily, and meanwhile the rigidity and sharpness of the indwelling needle in the process of venipuncture are maintained.

Description

【Technical field】 [0001] The invention belongs to the technical field of medical equipment. More specifically, the present invention relates to a self-sealing venous indwelling needle, and also relates to a production method of the self-sealing venous indwelling needle. 【Background technique】 [0002] In 2013, the amount of intravenous infusion in my country was 10.4 billion bottles, the amount of intravenous infusion devices was 3 billion sets, and the amount of intravenous indwelling needles was more than 300 million. They are mainly produced by the joint venture of BD Company in the United States, the joint venture of Braun Company, Shandong Weigao Company, and Suzhou Linhua Company. [0003] The venous indwelling needle is also called the venous trocar, which is composed of a stainless steel needle core, an outer cannula and a plastic needle seat. When puncturing, the stainless steel needle core and the outer cannula are inserted into the blood vessel together, and the...

AI Technical Summary

Problems solved by technology

This method only reduces the "cannula sealing" operation of nurses. However, since the tip of the indwelling catheter is open, the pressure fluctuations brought about by breathing and heartbeat will still cause "blood back" and the entry of platelets and coagulation substances, which will still cause coagulation to block the catheter.

[0011] In addition, there are other methods of setting anti-reflux mechanical valves and duckbill one-way openings at the tip of the catheter. Due to the uncertain effect of "sealing the tube", it has been on the market for many years and has not been recommended in the "Practice Standards for Intravenous Infusion" in the United States and my country. use, these products are no longer available in the market

Images