US6258098B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stent placement and removal system
Assignee: BIU Biomedical Innovations Urology Inc
•
Filing: 1998-05-08
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Granted: 2001-07-10
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Expires: 2018-05-08
Abstract
Abstract Placement and non-surgical removal of a ureteral stent is accomplished by suspending a ferromagnetic bead from an indwelling stent The bead is suspended by a flaccid tether that reduces the likelihood of patient irritation when a shortened stent is used. The bead, tether, and stent assembly are advanced into the patient as a unit via a conventional cystoscope. A magnet-tipped catheter is employed to engage the bead in the bladder and permit removal of the connected stent as the catheter is withdrawn.
Inventors
- 👤 William N. Taylor
- 👤 Ian McDougall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:49
CPC Classifications
A; A61; A61M; A61M27/00; A61M27/002; A61M27/008; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/82; A61F2/94; A61F2/95
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
A stent assembly, comprising: an elongated stent having a distal end; a ferromagnetic member having a length substantially shorter than the length of the stent; and a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, the tether being flaccid so that the tether readily yields to all but tensile force, thereby to enable the ferromagnetic member to be suspended and movable relative to the distal end of the stent.
Claim 2
Dependent Claim
102 words
A stent assembly, comprising: an elongated stent having a distal end; a ferromagnetic member having a length substantially shorter than the length of the stent; and a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, the tether being flaccid so that the tether readily yields to all but tensile force, thereby to enable the ferromagnetic member to be suspended and movable relative to the distal end of the stent.
Claim 3
Dependent Claim
31 words
The assembly of claim 1 wherein the ferromagnetic member has opposing ends that are tapered to facilitate penetration into and withdrawal from a ureter into which the stent may be placed.
Claim 4
Dependent Claim
15 words
The assembly of claim 1 wherein the ferromagnetic member includes a transverse passage extending therethrough.
Claim 5
Dependent Claim
26 words
The assembly of claim 3 wherein the ferromagnetic member has a generally circular cross section and wherein the transverse passage extends diametrically through the ferromagnetic member.
Claim 6
Dependent Claim
77 words
A stent assembly, comprising: an elongated stent having a distal end; a ferromagnetic member having a length substantially shorter than the length of the stent; and a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the tether is configured as an endless loop.
Claim 7
Dependent Claim
77 words
A stent assembly, comprising: an elongated stent having a distal end; a ferromagnetic member having a length substantially shorter than the length of the stent; and a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the tether is configured as an endless loop.
Claim 8
Dependent Claim
92 words
A stent assembly, comprising: an elongated stent having a distal end; a ferromagnetic member having a length substantially shorter than the length of the stent; and a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the stent includes a central lumen and at least one perforation, the tether extending through the perforation and a portion of the lumen.
Claim 9
Dependent Claim
92 words
A stent assembly, comprising: an elongated stent having a distal end; a ferromagnetic member having a length substantially shorter than the length of the stent; and a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the stent includes a central lumen and at least one perforation, the tether extending through the perforation and a portion of the lumen.
Claim 10
Dependent Claim
89 words
A stent assembly, comprising: an elongated stent having a distal end; a ferromagnetic member having a length substantially shorter than the length of the stent; and a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the ferromagnetic member has an opening, into which opening the tether extends to secure the ferromagnetic member to the tether.
Claim 11
Dependent Claim
89 words
A stent assembly, comprising: an elongated stent having a distal end; a ferromagnetic member having a length substantially shorter than the length of the stent; and a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the ferromagnetic member has an opening, into which opening the tether extends to secure the ferromagnetic member to the tether.
Claim 12
Dependent Claim
49 words
The assembly of claim 7 wherein the ferromagnetic member is an elongated member and wherein the opening extends in a direction that is generally perpendicular to a long axis of the member, the ferromagnetic member being rotatable relative to a portion of the tether that extends through the opening.
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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) | 2004-07-09 | 2005-01-08 | 2005-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-07-09 | 2009-01-08 | 2009-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-07-09 | 2013-01-08 | 2013-07-10 | $7700.00 | Window Closed / Lapsed |