Safe venous blood sampling system with self-locking device
A self-locking device and safe technology, applied in the field of medical devices, can solve the problems of collection failure, prolongation of time, and reduction of collection speed, and achieve the effects of eliminating needle stick injuries, ensuring reliable connection, and ensuring insertion depth.
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[0028] figure 1 It is an exploded schematic diagram of the overall structure of the safety venous blood collection system with self-locking device of the present invention. It can be seen from the figure that the safety venous blood collection system with self-locking device of the present invention is composed of the following parts: needle tube 1, spring 2, needle holder 3, Hemostatic sheath 4, outer cylinder 5, sheath 6, end cap C, inner plug B, test tube D. The front end of the needle tube 1 has a sharp cutting edge, which is a venipuncture needle 1a, and the rear end also has a sharp cutting edge, which is a blood collection needle 1b. The middle and lower section of the needle tube has a side hole 1c; the blood blocking sleeve 4 is a hollow blind tube, its The tube wall of the front port is thickened to 4a, made of elastic sealing material (rubber or silica gel, elastic plastic); spring 2 is made of stainless steel, its length is L, and its outer diameter is T. The oute...
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