Artery puncture needle capable of preventing blood backflow

Abstract

The artery puncture needle comprises a needle tube and a needle head, a piston is slidably connected into the needle tube, a push plate is arranged in the piston, a push rod is arranged at the top of the push plate, a clamping structure used for connecting the push plate and the push rod is installed in the push rod, a through hole is formed in the bottom of the needle tube, the bottom of the through hole is communicated with the needle head, and a ball is arranged at the top of the through hole. An elastic element is arranged between the ball and the needle tube, an annular groove is formed in the side wall of the needle tube, reset springs are fixedly connected into the annular groove, fixing pieces are fixedly connected to the ends of the reset springs, ejector rods are fixedly connected to the inner sides of the fixing pieces, and the inner side ends of the ejector rods make contact with the bottom of the ball. The anti-backflow artery puncture needle solves the problem that an existing artery puncture needle cannot effectively achieve the anti-backflow effect, and the needle tube can be directly used as a container to send a sample for inspection after sampling.

Description

technical field [0001] The invention relates to the technical field of puncture needles, in particular to an arterial puncture needle for preventing blood backflow. Background technique [0002] Puncture, a commonly used surgical term in medicine, is a diagnosis and treatment technique in which a puncture needle is inserted into a body cavity to extract secretions for testing, inject gas or contrast agent into the body cavity for contrast examination, or inject drugs into the body cavity. Puncture is divided into venipuncture and arterial puncture, the main purpose of which is blood test, blood transfusion, infusion and catheter placement for angiography. [0003] However, the existing puncture needle cannot effectively prevent backflow. Whether it is the collected secretion sample or the blood backflow after entering the puncture needle, it is easy to cause infection in the patient. Neither the sample nor the blood return is difficult to remedy. [0004] Based on this, th...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an arterial puncture needle for preventing blood reflux, so as to solve the problem that the existing arterial puncture needles cannot effectively prevent backflow in the above-mentioned background technology

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