Intravenous cannula insertion assembly with protective shield
First Claim
1. An intravenous cannula insertion assembly comprising:
- a cannula and cannula hub;
an elongate needle protector, said protector comprising a slotted tube;
a needle and needle hub, said needle hub and said cannula hub operatively inter-engageable within said protector, said needle hub and said cannula hub being extensible together from the protector to allow intravenous insertion of the cannula, said protector further having retraction prevention means for preventing retraction of the cannula hub after it has been fully extended; and
interlocking means for interlocking the cannula hub with the needle hub both during extension and when fully extended until positively released from each other by a primary release means, said primary release means extending through said slot to allow the needle hub and cannula hub to be slidable within said protector, said primary release means being operable only when the cannula hub and the needle hub are in the extended position.
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Accused Products
Abstract
The present invention provides an assembly of an intravenous cannula insertion device and an elongate needle protector, said protector comprising a slotted tube, a needle and needle hub, said needle hub comprising a protrusion extending through said slot to allow the needle and needle hub assembly to be slidable within said protector,
a cannula hub operatively inter-engagable with said needle hub within said protector, whereby said needle hub and said cannula hub are extensible together from the protector to allow i.v. insertion of the cannula, and wherein said assembly includes retraction prevention latches for preventing retraction of the cannula hub after it has been fully extended;
and wherein the cannula hub remains interlocked with the needle hub when fully extended until released from the assembly by a fin, so that needlestick is prevented.
248 Citations
7 Claims
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1. An intravenous cannula insertion assembly comprising:
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a cannula and cannula hub; an elongate needle protector, said protector comprising a slotted tube; a needle and needle hub, said needle hub and said cannula hub operatively inter-engageable within said protector, said needle hub and said cannula hub being extensible together from the protector to allow intravenous insertion of the cannula, said protector further having retraction prevention means for preventing retraction of the cannula hub after it has been fully extended; and interlocking means for interlocking the cannula hub with the needle hub both during extension and when fully extended until positively released from each other by a primary release means, said primary release means extending through said slot to allow the needle hub and cannula hub to be slidable within said protector, said primary release means being operable only when the cannula hub and the needle hub are in the extended position. - View Dependent Claims (2, 3, 4, 5)
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- 6. A needle protector tube for protecting a cannula and needle hub comprising, an elongated hollow body formed with a longitudinal slot to accommodate the cannula hub and needle hub and having a length sufficient to accommodate an introducer needle extending from said hub, said slot being open at a distal end and provided with a nip portion in said slot to allow for one way passage of a cannula hub fin to the extended position, the distal end of the protector tube further provided with retaining means for retaining the cannula hub in the extended position such that relative rotation of the cannula hub and needle protector tube is required to disengage the cannula hub and the needle protector tube.
Specification