Patent US5304195A successfully refreshed from Google Patents.
US5304195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable pusher-vasoocclusive coil assembly with interlocking coupling
Assignee: Target Therapeutics Inc
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Filing: 1993-01-21
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Granted: 1994-04-19
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Expires: 2013-01-21
Abstract
Abstract A pusher-vasoocclusive coil assembly that is advanced through a catheter to a site within a vessel and is manipulated to detach the coil from the assembly. The coil has an affixed, proximally-extending wire that carries a ball on its proximal end and the pusher has an affixed, distally-extending wire that carries a ball on its distal end. The pusher and coil are coupled by placing the wires and balls in an overlapping interlocked position and enclosing the coupled assembly with a coaxial sleeve. The coil-pusher-sleeve assembly is positioned at the site and the sleeve is retracted to allow the balls to move radially relative to one another to disengage and uncouple the pusher and coil.
Inventors
- 👤 Robert H. Twyford, Jr.
- 👤 Erik T. Engelson
- 👤 Uriel H. Chee
- 👤 Michael J. Mariant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:48
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12131; A61B17/1214; A61B2017/1205; A61F; A61F2/00; A61F2/01; A61F2002/016; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0091
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
175 words
A detachable pusher-vasoocclusive coil assembly for use in occluding a selected site within a vessel comprising in combination: (a) a vasoocclusive coil having a proximal end that carries a first radial protuberance; (b) a pusher having a distal end and having an affixed, distally-extending radially biased member that carries a second radial protuberance located distally on the radially biased member, said second radial protuberance axially overlapping and interlocking with the first radial protuberance; and (c) means carried coaxially about the pusher and coil that is axially movable relative to the coil and pusher from a first position at which the means enclosed the overlapped, interlocked protuberances to prevent said protuberances from substantial radial movement relative to each other to a second position at which the means does not enclose the protuberance and the protuberances are free to disengage, wherein the radially biased member on the pusher causes disengagement of the pusher from the vasoocclusive coil upon axial movement of the means carried about the pusher and coil from the first position to the second position.
Claim 2
Dependent Claim
175 words
A detachable pusher-vasoocclusive coil assembly for use in occluding a selected site within a vessel comprising in combination: (a) a vasoocclusive coil having a proximal end that carries a first radial protuberance; (b) a pusher having a distal end and having an affixed, distally-extending radially biased member that carries a second radial protuberance located distally on the radially biased member, said second radial protuberance axially overlapping and interlocking with the first radial protuberance; and (c) means carried coaxially about the pusher and coil that is axially movable relative to the coil and pusher from a first position at which the means enclosed the overlapped, interlocked protuberances to prevent said protuberances from substantial radial movement relative to each other to a second position at which the means does not enclose the protuberance and the protuberances are free to disengage, wherein the radially biased member on the pusher causes disengagement of the pusher from the vasoocclusive coil upon axial movement of the means carried about the pusher and coil from the first position to the second position.
Claim 3
Dependent Claim
11 words
The assembly of claim 1 wherein the means is a catheter.
Claim 4
Dependent Claim
18 words
The assembly of claim 1 wherein the means is a sleeve adapted to be received within a catheter.
Claim 5
Dependent Claim
21 words
The assembly of claim 1 wherein the vasoocclusive coil has an affixed, proximally-extending member on which the first protuberance is affixed.
Claim 6
Dependent Claim
18 words
The assembly of claim 4 wherein the affixed, proximally-extending member on the vasoocclusive coil wires is radially biased.
Claim 7
Dependent Claim
13 words
The assembly of claim 1 wherein the protuberances are generally spherical in shape.
Claim 8
Dependent Claim
74 words
A method for occluding a selected site within a vessel comprising the steps of: (a) accessing the site with a distal end of a catheter; (b) advancing the assembly of claim 1 through the catheter with the protuberances interlocked to a position distally of the distal end of the catheter; (c) permitting the protuberances to uncouple and the coil to detached from the pusher; and (d) withdrawing the catheter and pusher from the vessel.
Claim 9
Dependent Claim
75 words
A method for occluding a selected site within a vessel comprising the steps of: (a) accessing the site with a distal end of a catheter; (b) advancing the assembly of claim 3 through the catheter with the protuberances interlocked to a position distally of the distal end of the catheter; (c) permitting the protuberances to uncouple and the coil to detach from the pusher; and (d) withdrawing the catheter, sleeve and pusher from the vessel.
Claim 10
Dependent Claim
74 words
A method for occluding a selected site within a vessel comprising the steps of: (a) accessing the site with a distal end of a catheter; (b) advancing the assembly of claim 4 through the catheter with the protuberances interlocked to a position distally of the distal end of the catheter; (c) permitting the protuberances to uncouple and the coil to detach from the pusher; and (d) withdrawing the catheter and pusher from the vessel.
Claim 11
Dependent Claim
74 words
A method for occluding a selected site within a vessel comprising the steps of: (a) accessing the site with a distal end of a catheter; (b) advancing the assembly of claim 5 through the catheter with the protuberances interlocked to a position distally of the distal end of the catheter; (c) permitting the protuberances to uncouple and the coil to detach from the pusher; and (d) withdrawing the catheter and pusher from the vessel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-18 | 1997-10-18 | 1998-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-18 | 2001-10-18 | 2002-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-18 | 2005-10-18 | 2006-04-19 | $7700.00 | Window Closed / Lapsed |