Needle point shielding type anti-backflow venous indwelling needle
A venous indwelling needle and anti-reflux technology, which is applied in the direction of needles and devices introduced into the body, can solve the problems of blood and external air contact pollution, blood reflux, etc., to reduce cross-infection and pollution, prevent blood reflux, and avoid blood reflux Effect
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[0019] such as cutaway figure 1 As shown, the needle tip shielded anti-reflux venous indwelling needle assembly includes: needle tube 1, catheter 2, catheter seat front seat 3, catheter seat rear seat 6, needle core 4, reflux valve 5, needle tip shielding device including positioning block 7, double-wing needle seat 8. Guide groove 9. A detachable needle tip shielding device is installed at the rear end of the catheter base, and the needle tip shielding device is divided into three parts, which are respectively 7 parts of the positioning block, 9 parts of the guide groove and 8 parts of the double-winged needle holder. One end of the double-wing needle seat is assembled with the needle tube, and the other end is provided with a clamping position, which is convenient for clamping into the clamping ring to play a limiting role; the guide groove part is provided with a guide groove, which is convenient for indwelling needles. As the double-winged needle holder slides in the guid...
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