AUTOMATICALLY RETRACTING BLOOD SAMPLING NEEDLE Russian patent published in 2020 - IPC A61B5/15 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to an automatically retractable blood sampling needle comprising needle-holder (1) comprising first tube (11), second tube (12) and tail portion (13); needle (2) installed in first tube (11); inbuilt pull-out sleeve (3), which is an elongated through member, the cross-section of which has a C-shape; hollow and elongated body of needle (4); spring put on first tube (11). Second tube (12) is installed in the built-in extension sleeve (3) with the possibility of sliding forward and backward. Built-in retractable sleeve (3) is fitted in needle body (4) to move forward and backward. Fixation mechanism is formed by tail part of needle-bearing holder (13) and needle body (4). When the tail part of holder (13) disengages from the body of needle (4), the force of the spring pushes second tube (12), causing it to slide backward, shifting the built-in extension sleeve (3) back into the fixation position with the needle body, so that the needle is fully retracted in needle body.

EFFECT: automatically retractable blood sampling needle of the present invention can prevent vascular injury by the needle and the occurrence of cross infections and miniaturize the structure of the article.

16 cl, 24 dwg