Indwelling needle

Abstract

The invention relates to an indwelling needle comprising a catheter assembly and a needle tube assembly, wherein the catheter assembly comprises a catheter, a catheter seat, a metal wedge, a siliconeplug and a fixing pin; the rear end of the catheter is connected with the metal wedge, and the front end protrudes out of the catheter seat and is assembled with the metal wedge into the catheter seat; the catheter seat is provided with a boss and a groove inside in order; the silicone plug is arranged on the catheter seat with the front end of the silicone plug abutting against the boss of the catheter seat; the fixing pin is in the catheter seat behind the silicone plug; the needle tube assembly includes a needle tube, an upper needle seat and a lower needle seat; the upper needle seat is detachably positioned outside the rear end of the catheter seat; the lower needle seat is detachably positioned at the rear end of the catheter seat; the rear end of the needle tube is fixed to the lower needle seat; the front end of the needle tube passes through an inner hole of the upper needle seat, the fixing pin, the silicone plug and the catheter in order, and then the upper needle seat and the lower needle seat are buckled slidingly. The indwelling needle is simple in structure, can achieve puncturing with one hand, effectively increases the success rate of puncturing, simplifies operation steps, improves clinical care levels and reduces indwelling needle complications.

Description

technical field [0001] The invention relates to a medical device, in particular to an indwelling needle which can be punctured with one hand. Background technique [0002] At present, disposable venous indwelling needle products are clinically used for peripheral venous infusion and blood sample collection, or for short-term venipuncture indwelling for drug infusion. After the venous indwelling needle is successfully punctured, only the catheter made of polymer material is used to indwell the human venous blood vessels. Therefore, it has the characteristics of less irritation to the blood vessels, can be left in place for many days, reduces the patient's puncture pain, and is easy to use. It has become the most widely used at present. One of the piercing tools. [0003] However, with the existing closed venous indwelling needles, the left hand is often used to hold and fix the puncture site of the patient's upper arm during puncture. Send the catheter seat forward, and wit...

AI Technical Summary

Problems solved by technology

On the one hand, once the left-hand fixation part is loosened and the catheter is sent forward, the blood vessel will no longer be subjected to the external force of the left-hand fixation, and the blood vessel will often become curved and not as straight as before. Slight changes lead to puncture failure; on the other hand, doctors or nurses switch hands during operation, which is cumbersome and inconvenient for clinical operation

Images