Pen type safe blood taking needle

Abstract

A pen type safe blood taking needle is composed of a protective cap, a protective sleeve, a handle, a needle tube, a needle base, a spring, a blood blocking sleeve and a needle holder. An observationwindow is formed in the upper section of the needle seat, the protective sleeve is hidden in the handle, and the handle and the needle holder are mutually embedded and fixed; a protruding point is arranged on the outer side of the lower end of the protective sleeve, a warped part extending downwards and outwards is arranged on the opposite side of the protruding point, a pair of barb-shaped locking parts is arranged on the two sides of the protruding point, the locking parts can penetrate through opposite holes in the needle base wafer to be fixedly embedded in the needle base, and the springis compressed in a space formed by the needle base and the protective sleeve. During blood collection, the blood collection tube is inserted into the needle holder cylinder, so that the blood collection needle pierces the blood collection tube rubber plug, the blood collection tube cap can abut against the locking plate to move forwards, and locking of the spring is released; after blood samplingis completed, the spring resets to enable the protective sleeve to synchronously move forwards to cover the puncture needle tube and to be locked to prevent the puncture needle tube from being exposedagain while the needle is pulled out. The disposable puncture needle is simple in structure, convenient, safe, reliable and capable of being destroyed after being used, eliminating bloodstain splashing caused by retraction of the needle tube, eliminating puncture injuries and protecting medical staff.

Description

technical field [0001] The invention relates to a medical device, specifically a pen type safety blood collection needle with a needle holder, which is used in the collection process of venous blood specimens in cooperation with a vacuum blood collection tube. Background technique [0002] There are usually three ways to collect blood samples: (1) subcutaneous blood collection: mostly used for the classification and detection of blood cell components, and subcutaneous peripheral blood collection needles are often used; (2) venous blood collection: mostly used for blood cytology, etiology , immunology, genetics and other related disciplines for detailed detection, clinical application is very wide, mostly use pen type, split venous blood collection needle; Less, use arterial blood sampler to collect. [0003] In venous blood collection, pen type blood collection needles, split blood collection needles or syringes are often used clinically; the present invention only relates ...

AI Technical Summary

Problems solved by technology

[0010] The following deficiencies were found during production and clinical use: because the trigger button is located on the side of the needle holder, sometimes it is triggered early due to rough loading and unloading, trampling and other behaviors during transportation, which makes the product invalid; that is, the reliability and stability of the product Reduced; use the compressed spring force to shoot the puncture needle and the needle seat into the inner cavity of the outer cylinder, and the retracted reaction force can make the remaining blood stains in the puncture needle tube splash out. Although the amount is small, it is also harmful to the medical staff and the surrounding environment. May pose new pollution and risks

However, due to its complex structure and high cost, the recovery device has to be packaged separately from the blood collection needle, which makes it difficult to popularize it at the grassroots level.

Images