Telescoping needle shield
First Claim
1. A needle shield for a needle having opposed proximal and distal ends, said shield comprising a plurality of tubes surrounding said needle, with a proximal-most tube defining a base tube fixed in proximity to said proximal end of said needle, and a distal-most tube operably connected to the base tube for telescoping movement between a collapsed condition where the distal-most tube is disposed over the base tube and the distal end of said needle is exposed and an extended condition where the distal end of the needle is surrounded by the shield and wherein the distal-most tube has a wall thickness greater than a wall thickness of the base tube.
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Accused Products
Abstract
A needle assembly is provided with a needle securely mounted to a needle hub. A shield assembly includes a plurality of telescoped tubes concentrically surrounding the needle. One of the telescoped tubes is securely connected to the needle hub. The other tubes in the assembly may be slid away from the needle hub. The tubes have combined lengths to enable complete shielding of the needle when the tubes are telescopingly extended. The distal-most tube, when the tubes are telescopingly extended, includes a tip guard which resiliently moves over the distal tip of the needle as the shield assembly is fully extended. The distal-most tube, when the tubes are telescopingly extended, of the shield assembly frictionally engages a catheter adapter to prevent withdrawal of the needle from the shield assembly until the tubes are fully telescopingly extended. As full shielding of the needle is reached, the shielded needle is separated from the catheter adapter.
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Citations
14 Claims
- 1. A needle shield for a needle having opposed proximal and distal ends, said shield comprising a plurality of tubes surrounding said needle, with a proximal-most tube defining a base tube fixed in proximity to said proximal end of said needle, and a distal-most tube operably connected to the base tube for telescoping movement between a collapsed condition where the distal-most tube is disposed over the base tube and the distal end of said needle is exposed and an extended condition where the distal end of the needle is surrounded by the shield and wherein the distal-most tube has a wall thickness greater than a wall thickness of the base tube.
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5. A catheter introducer set, comprising:
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a needle having opposed proximal and distal ends; a needle hub securely connected to the proximal end of the needle, portions of the needle hub intermediate the proximal and distal ends of the needle defining a shield cavity surrounding the needle; a shield assembly surrounding the needle and comprising a plurality of nested tubes in sliding telescoping relation with one another with a proximal-most tube defining a base tube having a proximal end secured to the needle hub and a distal-most tube operably connected to the base tube wherein the distal-most tube has a wall thickness greater than a wall thickness of the base tube and the distal-most tube is disposed over the base tube when the shield assembly is in a collapsed condition; and a catheter adapter, the shield assembly being releasably engaged with the catheter adapter. - View Dependent Claims (6, 7, 8, 9, 10, 12, 14)
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Specification