EP0567321A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Intravenous catheter with needle guard
Assignee: Ethicon Inc
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Filing: 1993-04-21
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Granted: —
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Expires: 2013-04-21
Abstract
Abstract One-way intravenous catheter assembly provided with a tubular needle guard slidable with respect to the needle housing, so as to completely cover the needle both before and after use, said needle housing comprising a substantially cylindrical central body with a flash chamber and a tapered front portion, to which the catheter needle is attached, and a peripheral finger gripping element, connected to said central body but extending around the tubular needle guard, the connection being provided by a connecting element which is slidable in a longitudinal slot of the tubular needle guard, the catheter assembly being further provided with a catheter tube or cannula mounted around the needle and provided with a hub for engagement with said tapered front portion of the needle housing. In another embodiment, the orientation of the needle housing is reversed, and an elastomeric plug is provided to ease threading of the catheter.
Inventors
- 👤 Joseph J. Chang
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 19:17
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0612; A61M25/0631; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/322; A61M5/3221; A61M2005/3228
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
110 words
A catheter assembly comprising: a catheter attached to a catheter hub; a needle capable of being inserted into said catheter hub and into said catheter; a needle housing having a distal end for holding said needle, a cylindrical central body to which said needle is attached gripping means for moving said needle housing, and longitudinal guide means connecting said gripping means to said central body; a cylindrical needle guard with a pair of open ends, said guard having a guide capable of mating with said guide means of said needle housing; and wherein said needle guard further contains a push-off tab on the opposite side of said needle guard guide.
Claim 2
Dependent Claim
110 words
A catheter assembly comprising: a catheter attached to a catheter hub; a needle capable of being inserted into said catheter hub and into said catheter; a needle housing having a distal end for holding said needle, a cylindrical central body to which said needle is attached gripping means for moving said needle housing, and longitudinal guide means connecting said gripping means to said central body; a cylindrical needle guard with a pair of open ends, said guard having a guide capable of mating with said guide means of said needle housing; and wherein said needle guard further contains a push-off tab on the opposite side of said needle guard guide.
Claim 3
Dependent Claim
15 words
The catheter assembly of claim 1 wherein said needle guard guide is a longitudinal slot.
Claim 4
Dependent Claim
43 words
The catheter assembly of claim 2 wherein catheter with needle guard has a length greater than the length of the needle and whose inner diameter is sufficient for it to surround all the elements of the catheter assembly but for said gripping means.
Claim 5
Dependent Claim
34 words
The catheter assembly of claim 3 wherein locking means are provided on said slot and said longitudinal guide means for locking the needle guard in a position totally advanced with respect to the catheter.
Claim 6
Dependent Claim
36 words
The catheter assembly according to claim 4, wherein the cylindrical central body of said needle housing is provided with two transverse guiding ribs whose outerdiameter is sized to fit the internal surface of said needle guard.
Claim 7
Dependent Claim
34 words
Catheter according to claim 4, wherein said needle housing is provided with four longitudinal guiding ribs as part of said cylindrical body such that said ribs fits within internal surface of said needle housing.
Claim 8
Dependent Claim
17 words
Catheter according to claim 4 wherein said finger gripping means has a partially interrupted cylindrical internal surface.
Claim 9
Dependent Claim
105 words
Catheter according to claim 4 wherein said longitudinal guide means which connects the central body of said needle housing to said gripping means, and which cooperates with said longitudinal slot for guiding said needle guard, is made of two separate portions both tapered to a greater width towards the central portion of said guide means, and separated by an aperture in said central portion, and wherein locking means are provided on said guide means consisting of a aperture in the central portion of said guide means, while the corresponding locking means on said needle guard consist of two opposed teeth projecting along said guiding slot.
Claim 10
Dependent Claim
31 words
Catheter according to claim 8 wherein said longitudinal slot is provided with a pair of opposed teeth having a rounded profile and located towards the distal end of said needle guard.
Claim 11
Dependent Claim
22 words
Catheter according to claim 4 wherein said cylindrical central body of said needle housing is made of a transparent or translucent material.
Claim 12
Dependent Claim
19 words
Catheter according of claim 4 also comprising a microporous plus closing the rear end of said central cylindrical portion.
Claim 13
Dependent Claim
24 words
The catheter assembly of claim 1 further comprising an elastomeric plug capable of mating with said catheter hub, said needle insertable into said plug.
Claim 14
Dependent Claim
20 words
The catheter assembly of claim 12 wherein said plug has flanges which extend outside the diameter of said catheter hub.
Claim 15
Dependent Claim
14 words
The catheter assembly of claim 12 wherein said catheter hub contains a side port.
Claim 16
Dependent Claim
110 words
A catheter assembly comprising: a catheter attached to a catheter hub; a needle capable of being inserted into said catheter hub and into said catheter; a needle housing having a distal end for holding said needle, a cylindrical central body to which said needle is attached gripping means for moving said needle housing, and longitudinal guide means connecting said gripping means to said central body; a cylindrical needle guard with a pair of open ends, said guard having a guide capable of mating with said guide means of said needle housing; and further comprising an elastomeric plug capable of mating with said catheter hub, said needle insertable into said plug.
Claim 17
Dependent Claim
110 words
A catheter assembly comprising: a catheter attached to a catheter hub; a needle capable of being inserted into said catheter hub and into said catheter; a needle housing having a distal end for holding said needle, a cylindrical central body to which said needle is attached gripping means for moving said needle housing, and longitudinal guide means connecting said gripping means to said central body; a cylindrical needle guard with a pair of open ends, said guard having a guide capable of mating with said guide means of said needle housing; and further comprising an elastomeric plug capable of mating with said catheter hub, said needle insertable into said plug.
Claim 18
Dependent Claim
20 words
The catheter assembly of claim 15 wherein said plug has flanges which extend outside the diameter of said catheter hub.
Claim 19
Dependent Claim
14 words
The catheter assembly of claim 15 wherein said catheter hub contains a side port.
Claim 20
Dependent Claim
24 words
The catheter assembly of claim 15 wherein said needle guard further contains a push-off tab on the opposite side of said needle guard guide.
Claim 21
Dependent Claim
15 words
The catheter assembly of claim 15 wherein said needle guard guide is a longitudinal slot.
Claim 22
Dependent Claim
43 words
The catheter assembly of claim 19 wherein catheter with needle guard has a length greater than the length of the needle and whose inner diameter is sufficient for it to surround all the elements of the catheter assembly but for said gripping means.
Claim 23
Dependent Claim
34 words
The catheter assembly of claim 19 wherein locking means are provided on said slot and said longitudinal guide means for locking the needle guard in a position totally advanced with respect to the catheter.
Claim 24
Dependent Claim
36 words
The catheter assembly according to claim 20, wherein the cylindrical central body of said needle housing is provided with two transverse guiding ribs whose outerdiameter is sized to fit the internal surface of said needle guard.
Claim 25
Dependent Claim
34 words
Catheter according to claim 21 wherein said needle housing is provided with four longitudinal guiding ribs as part of said cylindrical body such that said ribs fits within internal surface of said needle housing.
Claim 26
Dependent Claim
17 words
Catheter according to claim 21 wherein said finger gripping means has a partially interrupted cylindrical internal surface.
Claim 27
Dependent Claim
105 words
Catheter according to claim 21 wherein said longitudinal guide means which connects the central body of said needle housing to said gripping means, and which cooperates with said longitudinal slot for guiding said needle guard, is made of two separate portions both tapered to a greater width towards the central portion of said guide means, and separated by an aperture in said central portion, and wherein locking means are provided on said guide means consisting of a aperture in the central portion of said guide means, while the corresponding locking means on said needle guard consist of two opposed teeth projecting along said guiding slot.
Claim 28
Dependent Claim
31 words
Catheter according to claim 25 wherein said longitudinal slot is provided with a pair of opposed teeth having a rounded profile and located towards the distal end of said needle guard.
Claim 29
Dependent Claim
22 words
Catheter according to claim 21 wherein said cylindrical central body of said needle housing is made of a transparent or translucent material.
Claim 30
Dependent Claim
19 words
Catheter according to claim 21 also comprising a microporous plug closing the rear end of said central cylindrical portion.
References Cited (Backward Citations)
No citation records indexed.
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