Shielded hypodermic needle with I.V. cannula

Details Shielded hypodermic needle with I.V. cannula Shielded hypodermic needle with I.V. cannula

1991-01-07

1994-03-22

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604171, 604263, A61M 532

Patent

active

052959740

ABSTRACT:
An I.V. cannula needle (37) has a base adapter (41) with a sleeve (43) which surrounds a compression spring (53) which urges a barrel (47) and its tapered point (49) to cover and protect the point (39) of the I.V. needle (37) An I.V. cannula (52) slips over the barrel (47) and has a winged base (55) which, when pulled backward, compresses a spring (53) inside a base extension (43) and exposes the needle point (39) for insertion. On withdrawing needle (37) and relaxing pull-back pressure, needle point (39) is automatically shielded by the point (49) of the barrel (47), but the loose-fitting I.V. cannula remains in the patient and is taped down and connected to I.V. tubing. A second embodiment comprises a wire (61) which can be manipulated back and forth through a barrel (81) by a winged member (69) operating within a slot (80) and against a spring (67). The wire (61) can protrude through the needle 81 and provide protection against accidental injury from the needle. An I.V. cannula (79) slips over the barrel (81) and is left implanted to receive I.V. tubing.

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