EP0087189A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Septum retaining means for percutaneous device
Assignee: Renal Systems Inc
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Filing: 1983-02-10
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Granted: —
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Expires: 2003-02-10
Abstract
Abstract Septum retaining means for an implantable tubular percutaneous device, this retaining means is a tubular stem insert (22) having an integral pressure plate (32) across an intermediate portion thereof. A modified septum (18) fits into the insert below the pressure plate. Tabs (24) extending outwardly from the upper edge of the insert cooperate with a grooved portion (30) of a body exterior cavity in the T-stem to provide means for holding the insert in the T-stem cavity. Notches (26) in the walls of the insert on either side of the tabs allow the wall portions containing the tabs to be flexed inwardly so as to permit the insert to be passed into and out of the T-stem. The insert is designed to permit a forceps or other crimping tool to obtain access to the tab containing insert wall portions for removal of the insert and septum.
Inventors
- 👤 Raymond F. Cracauer
- 👤 Felix Jesus Martinez
- 👤 Larry E. Fuller
- 👤 Louis C. Cosentino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:46
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0247; A61M2039/027
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
203 words
An improved removable retaining means for maintaining a septum (18) within the stem cavity of a percutaneous device having a body exterior stem portion (11) in fluid communication with a body interior portion (12), said device having a septum closure in the stem portion, said improved retaining means comprising a tubular septum retaining insert (22), the exterior configuration of which closely conforms to the configuration of the stem cavity, the insert including : an integral pressure plate member (32) located at an intermediate region between the top and the bottom of said insert so as to define an upper insert chamber (33) above the pressure plate and a lower insert chamber (34) below the pressure plate, said pressure plate having at least one cannula hole (35)therethrough; and at least one locking tab member (24) projecting outwardly from near the upper edge of said insert, said locking tab sized to fit within a retaining groove (30) within the stem cavity, each said locking tab having on either side thereof an elongated notch (26) extending downwardly through the insert wall whereby the insert wall portion carrying the tab may be flexed inwardly and the insert may be passed into and out of the stem cavity.
Claim 2
Dependent Claim
203 words
An improved removable retaining means for maintaining a septum (18) within the stem cavity of a percutaneous device having a body exterior stem portion (11) in fluid communication with a body interior portion (12), said device having a septum closure in the stem portion, said improved retaining means comprising a tubular septum retaining insert (22), the exterior configuration of which closely conforms to the configuration of the stem cavity, the insert including : an integral pressure plate member (32) located at an intermediate region between the top and the bottom of said insert so as to define an upper insert chamber (33) above the pressure plate and a lower insert chamber (34) below the pressure plate, said pressure plate having at least one cannula hole (35)therethrough; and at least one locking tab member (24) projecting outwardly from near the upper edge of said insert, said locking tab sized to fit within a retaining groove (30) within the stem cavity, each said locking tab having on either side thereof an elongated notch (26) extending downwardly through the insert wall whereby the insert wall portion carrying the tab may be flexed inwardly and the insert may be passed into and out of the stem cavity.
Claim 3
Dependent Claim
18 words
Retaining means according to claim 1, characterized by having two said insert locking tab members (24) diametrically opposed.
Claim 4
Dependent Claim
34 words
Retaining means according to claim 1, characterized in that the lower surface (28) of said insert locking tab member (24) is tapered so that the minimum tab thickness is at the outer edge thereof.
Claim 5
Dependent Claim
19 words
Retaining means according to claim 1, characterized by including alignment means for orienting the insert within the stem cavity.
Claim 6
Dependent Claim
31 words
Retaining means according to claim 1, characterized in that said insert has at least one alignment pin (50) extending downwardly into said lower insert chamber from said integral pressure plate (32).
Claim 7
Dependent Claim
26 words
Retaining means according to claim 1, characterized in that said insert includes a septum alignment groove extending along the bottom surface of said integral pressure plate.
Claim 8
Dependent Claim
54 words
Retaining means according to claim 1, characterized by including insert removal means (62) on the locking tab carrying portions of sidewalls thereof, whereby said locking tab carrying portions of the sidewalls may be engaged by a crimping tool and flexed inwardly for disengaging the locking tabs from the stem cavity of the percutaneous device.
Claim 9
Dependent Claim
64 words
Retaining means according to claim 1, in combination with said septum, the septum (18) having a top surface, a bottom surface and a stepped circumferential side surface, the upper portion of said side surface conforming to the configuration of said lower insert chamber and the lower portion of said side surface conforming to the configuration of the T stem cavity at the bottom thereof.
Claim 10
Dependent Claim
80 words
A combination according to claim 8, characterized in that the septum (18) further comprises a circumferential groove (42) in the side surface between the upper and lower portions thereof, an elastomeric ring (44) within the groove, said ring having an interior diameter at rest less than that of said groove, and at least one elongated slit (37) through the septum from the top surface to the bottom surface whereby a needle or other cannulae may be passed through the septum.
Claim 11
Dependent Claim
47 words
1 0 . A combination according to claim 8, in further combination with said implantable device, said insert (22) and septum (18) held within the implantable device by means of a groove in the interior wall of said stem into which said tab members (24) are fitted.
Claim 12
Dependent Claim
91 words
A combination according to claim 10. characterized in that said insert has two said tab members (24) diametrically opposed, said tabs are tapered so that the minimum tab thickness is at the outer edge thereof and said implantable device further has two notches (62) through the upper edge of the stem, aligned with said tab members, said notches providing means for a crimping tool to obtain access to said tabs so that the tabs may be squeezed inwardly to permit removal of said insert and septum from the T stem cavity.
Claim 13
Dependent Claim
54 words
A combination according to claim 1 0 , characterized in that said insert includes removal means on the locking tab carrying portions of the sidewalls thereof, whereby said locking tab carrying portions of the sidewalls may be engaged by a crimping tool and flexed inwardly for disengaging the locking tabs from said stem groove.
Claim 14
Dependent Claim
80 words
A combination according to claim 10 or 12, characterized in that said implantable device stem includes a pair of circumferential ridges (187, 188) on the exterior upper portion thereof, the first said ridge (187) forming a lip on the upper edge of the stem and providing a surface over which a cap or cannulae assembly (189) may be snapped and the second said ridge (188) located below said first ridge and providing an excutaneous gripping surface on the implantable device.
Claim 15
Dependent Claim
34 words
A combination according to claim 13 in further combination with said cannulae assembly, the cannulae assembly including means for engaging said stem lip to hold the cannulae assembly in place on the implantable device-.
Claim 16
Dependent Claim
64 words
A combination according to claim 8 in further combination with means for inserting said retaining means and septum into the implacable device, said inserting means comprising a rod-like member (190) including at one end thereof at least one alignment protrusion (192) whereby the rod may be centered in the upper insert chamber when said protrusion is placed in an: integral pressure plate cannulae hole.
References Cited (Backward Citations)
No citation records indexed.
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