Blood extraction device

Details Blood extraction device Blood extraction device

A - Human Necessities

61

M

128/80

A61M 5/178 (2006.01) A61B 5/15 (2006.01)

Patent

CA 2025976

A blood extraction device has a cannula (11) the front end of which can be stuck into the vein of a patient and the rear end (11") of which stands in flow communication with the interior of a sample tubule (12) which is hermetically closed at its rear end (12") and is closed at its front end, apart from an air vent (13, 13'). An inner tube (14) extending into the interior of the sample tubule (12) sealingly adjoins the rear end (11') of the cannula (11) and has an internal cross-section such that during the taking of blood a continuous blood column (15) is pressed from the rear end (11") of the cannula (11) into the internal tube (14) and does not break away in any position of the sample tubule (12) relative to the direction of gravity, i.e. even when the tubule is arranged beneath the cannula (12), at least so long as the cannula (11) is inserted in the vein (16).

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