Patent EP0599564A1 successfully refreshed from Google Patents.
EP0599564A1
Expired / Lapsed
EP
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Catheter device
Assignee: Becton Dickinson Infusion Therapy AB
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Filing: 1993-11-19
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Granted: —
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Expires: 2013-11-19
Abstract
Abstract A device comprises an elongate, tubular sheath (4) having an anterior and a posterior end, a pointed needle arranged in the sheath (4) for displacement between a first and a second end position, a catheter (26) initially supported by the needle, and an attachment for displacing the needle between the first and the second end position. The novelty of the invention resides in that the sealing means for sealing the anterior, initially open end of the sheath (4) is detachably connected to the attachment, that the sealing means further is detachably connected to the catheter (26), that the sealing means, during the displacement of the needle from the first to the second end position, is moved towards the anterior end of the sheath (4) to a sealing position, and that the sealing means is fixed in the sealing position for substantial sealing of the anterior end of the sheath (4).
Inventors
- 👤 Ulf Harry Wahlberg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:01
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0612; A61M25/0631
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
191 words
A device for protecting a needle in medico-technical equipment, both before and after use of such equipment, comprising an elongate tubular sheath (4) having an anterior and a posterior end (6; 8) a pointed needle (18) arranged in said sheath (4) for displacement between a first, retracted end position and a second, extended end position, a catheter (26) initially supported by the needle (18), and an attachment (16, 16') for displacing the needle (18) between said first and said second end positions, characterised in that a sealing means (30, 30') for sealing the anterior, initially open end (6) of the sheath (4) is detachably connected to said attachment (16, 16'), that said sealing means (30, 30') further is detachably connected to said catheter (26), that said sealing means (30, 30') during displacement of the needle (18) from said first, retracted end position to said second, extended end position is moved in a direction towards the anterior end (6) of the sheath (4) to a sealing position, and that said sealing means (30, 30') is fixed in said sealing position for substantial sealing of the anterior end (6) of the sheath (4).
Claim 2
Dependent Claim
49 words
A device as claimed in claim 1, characterised in that the sheath (4) is provided with at least one slot (10) which is extended in the longitudinal direction of the sheath (4) and through which a part (24) of said attachment (16, 16') passes for displacing the needle (18).
Claim 3
Dependent Claim
51 words
A device as claimed in claim 1 or 2, characterised in that there is provided at least one locking means (14) for releasably fixing said attachment (16) in at least said first, retracted end position, and a blocking means (13, 43) for immovably fixing the sealing means in said sealing position.
Claim 4
Dependent Claim
106 words
A device as claimed in claim 3, characterised in that said at least one locking means (14) is formed by a local reduction of the width of the slot (10) in the vicinity of said first, retracted end position of the attachment (16), said local reduction of the width of the slot (10) being so designed as to prevent unintentional displacement of the attachment (16), but being traversable in both longitudinal directions by applying a sufficiently high pushing force when displacing the needle (18) between said first, retracted and said second, extended end position, and between said second, extended and said first, retracted end position, respectively.
Claim 5
Dependent Claim
105 words
A device as claimed in claim 3, characterised in that said locking means is formed by at least one recess which is extended transversely of the longitudinal direction of the slot (10) and which interacts with said part (24) or a resilient lug of the attachment (16), said locking means preventing unintentional displacement of the attachment (16) but, by displacement of said part (24) or said lug out of engagement with said recess in the slot (10), allowing displacement of the needle (18) between said first, retracted and said second, extended end position, and between said second, extended and said first, retracted end position, respectively.
Claim 6
Independent Claim
107 words
A device as claimed in any one of claims 1-5, characterised in that said sealing means (30) has a shape and dimensions conformed to the interior of the sheath (4), that said sealing means (30) is provided with a passageway (32) having a diameter which is equal to or slightly greater than the outer diameter of the needle (18), and that said sealing means (30) has at least one lug (43) which is intended, in the second, extended end position of the needle (18), to be brought into engagement with a recess (13) provided inside the sheath (4) in the immediate vicinity of said anterior end (6).
Claim 7
Independent Claim
114 words
A device as claimed in any one of claims 1-5, characterised in that said sealing means (30) has a shape and dimensions conformed to the interior of the sheath (4), that said sealing means (30) is provided with a passageway (32) having a diameter which is equal to or slightly greater than the outer diameter of the needle (18), and that said sealing means (30) has an annular, resilient flange which is intended, in the second, extended end position of the needle (18), to be passed over a conical constriction provided in the interior of the sheath, said annular flange being in a position of engagement beyond the wide end of the conical constriction.
Claim 8
Dependent Claim
40 words
A device as claimed in claim 6 or 7, characterised in that the engagement of the locking means with the sealing means (30) is identified by a force and a sound indication confirming that the end position has been reached.
Claim 9
Dependent Claim
59 words
A device as claimed in claim 6 or 7, characterised in that said passageway (32), on the side facing away from the anterior end (6) of the sheath (4), passes into a recess (34) having such a shape and such an extent that the point (20) of the needle (18), after use, will be located in said recess (34).
Claim 10
Dependent Claim
73 words
A device as claimed in claim 9, characterised in that the recess (34), at least in the region of the mouth (36) of the passageway (32), has such a shape as to prevent re-entry of the needle (18) into the passageway (32), once the needle point (20), in connection with the withdrawal of the needle (18) from the second, extended end position to the first, retracted end position, has left said passageway (32).
Claim 11
Independent Claim
75 words
A device as claimed in any one of claims 6-10, characterised in that the sealing means (30), on the side facing the anterior end (6) of the sheath (4), has a recess (41), in which there is accommodated a plug(42), swelling or expanding when contacted with a fluid, for complete, fluid tight sealing of the passageway (32) and thus of the anterior end (6) of the sheath (4) after the needle (18) has been used.
Claim 12
Dependent Claim
69 words
A device as claimed in claim 1 or 2, characterised in that there is provided at least one locking means (14', 25) for releasably fixing said attachment (16') in at least said first, retracted end position and immovably fixing said attachment (16') in a final end position after use of the equipment, and a blocking means (13, 43) for immovably fixing the sealing means (30') in said sealing position.
Claim 13
Dependent Claim
60 words
A device as claimed in claim 12, characterised in that said at least one locking means is formed by projections 25 on the attachment 16' which co-operate with a gap 15' defined between opposed projections 14' formed on the inside surface of the sheath 4 so as to prevent unintentional displacement of the attachment 16' after use of the equipment.
Claim 14
Dependent Claim
65 words
A device as claimed in claim 12, characterised in that said locking means is formed by at least one recess or gap 15' which is extended transversely of the longitudinal direction of the slot (10) and which interacts with said part (24) or a projection (25) of the attachment (16'), said locking means preventing unintentional displacement of the attachment (16') after use of said equipment.
Claim 15
Independent Claim
110 words
A device as claimed in any one of claims 1-2 and 12-14, characterised in that said sealing means (30') has a shape and dimensions conformed to the interior of the sheath (4), that said sealing means (30') is provided with a passageway (32) having a diameter which, when assembled, is equal to or slightly greater than the outer diameter of the needle (18), and that said sealing means (30') has at least one lug (43) which is intended, in the second, extended end position of the needle (18), to be brought into engagement with a recess (13) provided inside the sheath (4) in the vicinity of said anterior end (6).
Claim 16
Dependent Claim
37 words
A device as claimed in claim 15, characterised in that the engagement of the locking means with the sealing means (30') is identified by aforce and a sound indication confirming that the end position has been reached.
Claim 17
Dependent Claim
39 words
A device as claimed in claim 15, characterised in that said passageway (32), on the side facing away from the anterior end (6) of the sheath (4), passes into a recess (34) for detachable connection with the attachment (16').
Claim 18
Independent Claim
50 words
A device as claimed in any one of claims 1-17, characterised in that there is provided on the outside of the sheath (4) at least one lug (38, 40) serving as an abutment when displacing the needle (18) between said first, retracted end position and said second, extended end position.
Claim 19
Independent Claim
40 words
A device as claimed in any one of claims 1-18, characterised in that the part (22) of the attachment (16, 16') displaceable along the outside of the sheath (4) for displacement of the needle (18) has a friction-increasing surface structure.
Claim 20
Dependent Claim
72 words
A device as claimed in claim 18 and 19, characterised in that said at least one lug (38, 40) and said part (22) of the attachment (16, 16') displaceable along the outside of the sheath (4) for displacement of the needle (18) are so ergonomically correctly positioned relative to each other that the needle (18) is displaceable with one hand between said first, retracted end position and said second, extended end position.
Claim 21
Independent Claim
56 words
A device as claimed in any one of claims 1-20, characterised in that the sealing means (30, 30') has a such a shape as to be detachably connectable to a catheter housing (28) of standard design for this type of medical equipment, and that this connection is completely fluid tight until it has been intentionally undone.
References Cited (Backward Citations)
WO1989000865A1
Cited
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