Pen type safety blood taking needle

Abstract

The invention discloses a pen type safety blood taking needle, which consists of a sheath, an outer cylinder, a needle base, a cock, a needle tube, a spring and a blood blocking cover, wherein a conical head is arranged at the front end of the outer cylinder; an inner hole of the conical head is communicated with an inner cavity of the outer cylinder; the lower section of the conical head expands conically; and side walls of a base of the conical head are provided with symmetrical fan-shaped holes. The lower section of the needle base is provided with a spring supporting platform, and the supporting platform is provided with two vertical and symmetrical suspension hooks which are clockwise or counterclockwise; a central hole of the cock is nested at the conical and expanded lower edge of the conical head, and the suspension hooks pass through the holes at the front end of the outer cylinder and are screwed and locked with the holes of the cock; the spring can be compressed in a space between the needle base and the inner hole of the conical head; and when the blood taking is finished, the limitation on the suspension hooks of the needle base can be released only by poking the cock to release the needle base and reset the spring so as to drive the needle tube to retract into the inner cavity of the outer cylinder. The pen type safety blood taking needle is simple in structure, convenient to use, safe and reliable, is destroyed after being used once, automatically withdraws a needle tip, protects medical personnel, and eliminates the injury of needling.

Description

(1) 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. (2) Background technology [0002] People collect and obtain human physiological and pathological information by various means for correct diagnosis of diseases; among them, there are usually three ways to collect blood samples: (1) subcutaneous blood collection, which is mostly used for simple classification and counting of blood components; Subcutaneous (solid or triangular) blood collection needles are often used; (2) Venous blood collection can perform detailed detection of hematology, blood pathogens and other related discipline indicators, which are widely used in clinical practice, and pen type is often used or split-type venous blood collection needle; (3) Arterial blood collection is mostly used to detect ...

AI Technical Summary

Problems solved by technology

At present, there is not yet a simple, economical, practical and safe technical solution that has been disclosed in China.

Images