Surgery – Truss – Pad
Patent
1990-04-19
1991-12-24
Hindenberg, Max
Surgery
Truss
Pad
128765, 604240, A61B 500
Patent
active
050743120
ABSTRACT:
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 extenion (15) having a smaller diameter than the extraction tube (11) and constructed as rearwardly 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 cannular cone (14) and having a passage (22). Onto the extension (15) a guide sleeve (17) can be pushd 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 between 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 eleastic plate (18) which consists of one piece with the plug (21).
REFERENCES:
patent: 4192320 (1980-03-01), Megahed
patent: 4378812 (1983-04-01), Sarstedt
patent: 4449539 (1984-05-01), Sarstedt
patent: 4576595 (1986-03-01), Aas et al.
Boler James M.
Hindenberg Max
Walter Sarstedt Gerate und Verbrauchs-material fur Medizin und
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