Blood taking needle with blood return visible

Abstract

The invention relates to a blood taking needle with blood return visible. The blood taking needle comprises a blood taking needle tube, a puncture needle and a needle seat; the needle seat comprises a blood taking end and a puncture end, the blood taking needle tube is inserted into the blood taking end, and the puncture needle is inserted into the puncture end; a visible blood return cavity is formed in the needle seat, the blood taking needle tube and the puncture needle are both communicated with the visible blood return cavity, the needle seat comprises a needle seat main body with the visible blood return cavity, and the needle seat main body is integrally formed by the blood taking end and the puncture end; the side wall of the needle seat main body is provided with a demoulding window of which the position corresponds to that of the visible blood return cavity, the visible blood return cavity penetrates through the side wall of the needle seat main body through the demoulding window, and a sealing cover is arranged on the demoulding window in a covering mode. The blood taking needle has the advantages of being capable of saving used materials and lowering the cost and good in structural stability.

Description

technical field [0001] The invention relates to the technical field of medical devices, and specifically designs a blood collection needle, in particular a blood collection needle with visible blood return. Background technique [0002] The disposable blood collection needle is matched with the disposable human venous blood sample vacuum collection container. The disposable blood collection needle mainly includes a blood collection needle tube and a puncture needle, and the blood collection needle tube is connected with the puncture needle through a connecting part. The puncture needle penetrates into the vacuum collection container of human venous blood sample, so that the collection container communicates with the blood collection needle. The current blood collection needles are divided into soft connection type and hard connection type. In the hard connection type blood collection needle, the needle seat of the blood collection needle is directly connected with the needl...

AI Technical Summary

Problems solved by technology

However, the existing blood-returning blood collection needles have the following defects: the needle seat of the blood collection needle is formed by splitting the blood collection end and the puncture end to form two independent parts and then assembled. Ring seat, the two outer ring seats increase the bonding area, and then bonded together with epoxy resin glue (such as the Chinese patent No. CN201220210072.5 of Weihai Hongyu Medical Instrument Co., Ltd. "A Visible Blood Returning Blood Collection Needle", The authorized publication number is CN202604841U); there are also sockets for connection (for example, the Chinese patent number of Hebei Xinle Technology Co., Ltd. is 201120105709. , it needs to be specially processed at the blood collection end and the puncture end to form a connection structure that is easy to assemble, which increases the amount of materials. Although for a single blood collection needle, the material increase is not obvious, but the demand for blood collection needles is large, and the cost is obvious in mass production; and assembly The formed needle seat has lower reliability in the structure

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