Biopsy needle device

A - Human Necessities – 61 – B

Patent

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Details

A61B 10/00 (2006.01)

Patent

CA 2551835

A medical needle shield apparatus (100) is provided that includes a first housing (52) configured to actuate a needle cannula (4). A second housing (106) is releasably engageable with the first housing (52). The needle cannula (4) is disposed for slidable movement with the second housing (106) such that the second housing (106) is extensible from a retracted position to an extended position to enclose a distal end of the needle cannula (4). The second housing (106) includes a binding member (40) that defines binding surfaces that form an aperture configured for slidable receipt of the needle cannula (4). The binding member (40) includes a drag inducing member (68) that engages the needle cannula (4) during slidable receipt of the needle cannula (4) to create a drag force. The drag force and second housing (106) facilitate rotation of the binding member (40) relative to a longitudinal axis of the needle cannula (4) such that the binding surfaces (68) engage the needle cannula (4) to prevent slidable movement of the needle cannula (4).

L'invention concerne un appareil de protection d'aiguille médicale qui comprend un premier logement conçu de manière à actionner une canule d'aiguille. Un second logement est couplé amovible au premier. La canule d'aiguille est placée de manière à effectuer un mouvement coulissant avec le second logement de sorte que le second logement puisse s'étendre à partir d'une position rétractée en une position étendue afin d'englober une extrémité distale de la canule d'aiguille. Le second logement comprend un élément de liaison qui définit des surfaces de liaison formant une ouverture conçue pour recevoir coulissant la canule de l'aiguille. L'élément de liaison comprend un élément induisant le glissement afin de se coupler à la canule de l'aiguille durant la réception coulissante de la canule de l'aiguille en vue de créer une force résistante. La force résistante et le second logement facilitent la rotation de l'élément de liaison par rapport à l'axe longitudinal de la canule de l'aiguille de sorte que les surfaces de liaison se mettent en prise avec la canule de l'aiguille afin d'éviter le mouvement glissant de la canule de l'aiguille.

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