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EP0578367A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Catheter with needle guard and extended flash chamber

Assignee: Ethicon Inc
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Filing: 1993-06-04
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Granted: —
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Expires: 2013-06-04
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Abstract

Abstract A catheter device (10) is described with a safety needle guard (30) that covers and protects the needle (24) after use of the device (10). The device (10) includes a semi-tubular needle housing (20) containing a flash chamber (26) with a hollow needle (24) extending from the distal end of the flash chamber (26). An extension tubing (70) is connected to the proximal end of the flash chamber (26), and extends past the proximal end of the needle guard (30). A tubular needle guard (30) concentrically fits and slides within the needle housing (20). The needle guard (30) has a longitudinal slot (36) through which the mounting base (27) of the flash chamber (26) passes as the guard (30) slides within the housing (20). The top of the semi-tubular housing (20) is open so that a user may access the top of the tubular needle guard (30) with a finger to urge the needle guard (30) to an extended position from the distal end of the housing (20) and in a surrounding position about the needle (24). As the needle guard (30) attains its fully extended position about the needle (24), it locks in place in the needle housing (20).

Inventors

  • 👤 Joseph J. Chang

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 07:34
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0612; A61M25/0631; A61M25/0693

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 164 words
A catheter assembly comprising: a semi-tubular needle housing with an open top; a hollow needle extending from the distal end of said needle housing; a tubular needle guard slideably located within said housing and having an open proximal end, and including at its distal end means for engaging a catheter hub, said distal end having an aperture for placing a hollow needle therethrough; means located partially on said needle housing and partially on said needle guard for locking said needle guard in an extended position relative to the distal end of said needle housing; a flash chamber located within said housing and containing an open proximal end, wherein said flash chamber includes a base for securing said flash chamber within said needle housing, and wherein said needle guard further includes a slot which engages said flash chamber base; and an extension tubing engaging the open proximal end of said flash chamber, said extension tubing extending past the open proximal end of said needle guard.
Claim 2
Dependent Claim 33 words
The catheter assembly of Claim 1, wherein said hollow needle extends from said flash chamber and the passageway of said hollow needle is in fluid communication with the interior of said flash chamber.
Claim 3
Dependent Claim 18 words
The catheter assembly of Claim 2, wherein said flash chamber is located within said slideably mounted needle guard.
Claim 4
Dependent Claim 32 words
The catheter assembly of Claim 1, wherein one longitudinal end of said flash chamber base is tapered to engage said needle guard slot during assembly of said needle guard and needle housing.
Claim 5
Dependent Claim 24 words
The catheter assembly of Claim 1, wherein said needle housing further includes two lateral sides, wherein each lateral side includes a contoured finger grip.
Claim 6
Dependent Claim 29 words
The catheter assembly of Claim 1, wherein said needle guard further includes an upward extending push tab located in the proximity of the distal end of said needle guard.
Claim 7
Dependent Claim 35 words
The catheter assembly of Claim 6, wherein said needle guard further includes a plurality of projections located on the upper surface of said needle guard and accessible through said open top of said needle housing.
Claim 8
Dependent Claim 65 words
A catheter assembly comprising a needle extending from a needle housing; a needle guard capable of sliding over said needle; a flash chamber located within said needle guard; and said flash chamber and needle guard having open distal ends; and an extension tubing engaging the open proximal end of said flash chamber, said extension tubing extending past the open proximal end of said needle guard.
Claim 9
Dependent Claim 18 words
The catheter assembly of Claim 8 wherein said extension tubing has a luer connection at its proximal end.
Claim 10
Dependent Claim 19 words
The catheter assembly of Claim 8 further including a flash plug at the end of said extension porous tubing.

References Cited (Backward Citations)

US4762516A Cited
US4772267A Cited
EP0322129A2 Cited
US5000740A Cited

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