A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/94
A61M 5/32 (2006.01) A61B 5/15 (2006.01)
Patent
CA 2015065
Blood extraction device A b s t r a c t A blood extraction device comprises an evacuatable extraction tube (11) which is open at one end and onto which a closure cap (12) can be detachably fitted which carries a cannula cone (14) which projects forwardly parallel to the tube axis (13) and extends concentrically into a cylindrical extension (15) having a smaller diameter than the extraction tube (11) and constructed as downwardly open tube and which consists of a rearwardly open stiff sleeve (20) closed at the front except for a needle passage opening (19) and a counter piece (21) adapted to be fitted sealingly onto the cannula cone (14) and having a passage (22). Onto the ex- tension (15) a guide sleeve (17) can be pushed axially from the front, said sleeve being complementary thereto, open at the rear and at the front carrying a cannula (16) sharpened on both sides, the cannula end (16a) extending into the interior of the guide sleeve (17) piercing an elastic plate (18) arranged near the needle passage opening (19), in axial alignment therewith and representing a part of the extension (15) and thus establishing a flow connection be- tween the interior of the cannula (16) and the interior of the cannula cone (14). According to the invention the counter piece is a soft-elastic plug (21) which is inserted into the stiff sleeve (20) and has a passage (22) which is open towards the screw cap (12), is adapted to be brought into a clamping fit with the cannula cone (14) holding the extension (15) firmly but releasably on the screw cap (12) and which is sealed at the front by the elastic plate (18) which consists of one piece with the plug (21). (Fig. 2)
G. Ronald Bell & Associates
Sarstedt Walter
Walter Sarstedt Gerate Und Ver Brancho Material Fur Medizim Umd
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