Anti-thrombotic safety cap for venous indwelling needle and using method thereof

Abstract

The invention discloses an anti-thrombotic safety cap for a venous indwelling needle and a using method of the anti-thrombotic safety cap. The anti-thrombotic safety cap comprises a cap base body which covers an infusion cavity opening of an indwelling needle base in a sealing mode and a connecting body which is integrally formed with the cap base body and can be connected with the outer wall of the infusion cavity opening of the indwelling needle base. An enclosed type liquid storage cavity used for generating positive pressure is formed in a cavity of the cap base body, a flaky structure is arranged on the bottom face of the liquid storage cavity, and a micropore which is formed after the flaky structure is punctured by a puncture needle forms a micropore permeating structure through the elasticity of the micropore. After the puncture needle is pulled out, the micropore is closed automatically so that blood in an indwelling needle hose can be effectively prevented from flowing back. After positive pressure liquid medicine is stored in the liquid storage cavity, the micropore can be opened under the action of the positive pressure so that a microchannel can be formed, the liquid medicine in the liquid storage cavity can be slowly dripped into the indwelling needle hose and be pressed towards the inside of a vein blood vessel to prevent the blood from flowing back into the indwelling needle hose, and thrombosis formation can be prevented. The anti-thrombotic safety cap for the venous indwelling needle is novel and simple in structure, low in manufacturing cost, capable of achieving a reliable positive pressure function, and capable of effectively preventing blood return for a long time.

Description

technical field [0001] The invention relates to a safety cover for an antithrombotic tampon for intravenous indwelling needles and a method for using the same, belonging to the technical field of medical devices. Background technique [0002] Infusion can inject almost all medicinal liquid into the human body through blood vessels to achieve the purpose of treating and preventing diseases. In clinical practice, it has been widely used in order to avoid the damage of blood vessels caused by multiple punctures and reduce the pain of patients, as well as to reduce the operating intensity of medical staff. The arteriovenous indwelling needle with anti-thrombus safety cover (tube) technology. The arteriovenous indwelling needles currently in clinical use are mostly composed of heparin sealing caps, puncture needles, puncture needle holders, indwelling needle hoses, indwelling needle holders, and indwelling needle protective covers. The indwelling needles are basically There is n...

AI Technical Summary

Problems solved by technology

However, this patent application has the following two defects: ①The positive pressure chamber is formed in the needle seat, resulting in complicated process and high manufacturing cost; ②The percolation channel is formed by threading on the isolation part, which increases the difficulty of processing on the one hand. On the other hand, the most important thing is the way of thread penetration. Because the fiber thread may fall off and dissolve in the cavity of the needle seat, the fiber foreign matter will enter the blood of the human body with the liquid, seriously endangering human health.

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