Novel pen type safety blood taking needle

Abstract

The invention discloses a novel pen type safety blood taking needle, which comprises a jacket, an outer cylinder, a needle seat, a key, a needle tube, a spring and a blood blocking sleeve. The front end of the outer cylinder is provided with a conical head; an inner hole of the conical head is communicated with the inner cavity of the outer cylinder; the lower section of the conical head is square; and symmetric notches are arranged on the base part. The lower section of the needle seat is provided with a spring support platform of which the surface is provided with a column table with round inside and square outside; the middle section of the column table is provided with symmetric notches corresponding to the notches of the conical head; the middle section of a lock sheet is provided with a square hole, and a slit is arranged on the lower edge of the hole; the width of the slit is equal to the outer diameter of the spring; the lock sheets are mounted in the notches of the conical head of the outer cylinder and inserted into the notches of the column table of the needle seat through the narrow slit so as to lock at the front end of the outer cylinder; the spring is also compressed in the inner hole of the conical head; and a support sheet is arranged below the key, and protruding protection is available peripherally. After blood taking is finished, the key is pressed to remove restriction on the notches of the column table of the needle seat and release the needle seat; and the spring is reset to drive the needle tube to retract into the inner cavity of the outer cylinder. The blood taking needle disclosed by the invention is simple in structure and convenient to use, safe, reliable and destroyed after used once; and moreover, the needle point is automatically taken back to protect medical care personnel and avoid needling injury.

Description

technical field [0001] The invention relates to a medical device, specifically a novel 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] People usually have the following three ways to collect blood samples: (1) subcutaneous blood collection: mostly used for simple classification and counting detection of blood components; mostly use subcutaneous (solid core or triangular needle tip) blood collection needles; Blood collection: It is used for the collection of specimens for detailed detection of blood cytology, blood pathogens, immunology and other related disciplines. It is widely used in clinical practice, and pen-type or split-type venous (hollow) blood collection needles are mostly used; (3) Arterial blood collection is mostly used to detect arterial blood gas indicators in critical emergencies, and is rarely used,...

AI Technical Summary

Problems solved by technology

At present, there is no technical solution that can be simple, economical, practical and safe in China.

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