US6267775B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-expanding medical device for centering radioactive treatment sources in body vessels
Assignee: Boston Scientific Scimed Inc
•
Filing: 2000-03-06
•
Granted: 2001-07-31
•
Expires: 2020-03-06
Abstract
Abstract A medical device for treating a body vessel with a radioactive source includes an elongated tubular catheter and an axially flexible support structure on a distal end of the catheter. The catheter has proximal and distal ends, and a lumen for receiving a radioactive source. The support structure is formed from a plurality of filaments which are helically wound and interwoven in a braided configuration and has a plurality of alternately spaced unconstricted and constricted regions. The unconstricted regions are radially compressible and self-expandable from a positioning diameter when the device is in a positioning state to a vessel-engaging, treatment diameter which is greater than the positioning diameter when the device is in the treatment state. The constricted regions are engaged with the catheter and concentric with the unconstricted regions. When in the treatment state the support structure causes the catheter to be substantially radially centered within a vessel so radiation is uniformly applied to the vessel during treatment.
Inventors
- 👤 Claude O. Clerc
- 👤 Jon S. Stinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:54
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/10; A61N5/1001; A61N5/1002; A61M; A61M25/00; A61M25/10; A61M25/1011; A61N2005/1003
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
68 words
A centering catheter for centering a radiation source in a vascular lumen, comprising: an elongate shaft having a proximal end and a distal end; and an expandable braid support structure connected to the distal end of the elongate shaft for centering the radioactive source within the vascular lumen, the braid structure defining a plurality of constriction regions upon expansion, the braid comprising a plurality of interwoven radio-transparent fibers.
Claim 2
Dependent Claim
68 words
A centering catheter for centering a radiation source in a vascular lumen, comprising: an elongate shaft having a proximal end and a distal end; and an expandable braid support structure connected to the distal end of the elongate shaft for centering the radioactive source within the vascular lumen, the braid structure defining a plurality of constriction regions upon expansion, the braid comprising a plurality of interwoven radio-transparent fibers.
Claim 3
Dependent Claim
27 words
A centering catheter as in claim 1 , wherein the elongate shaft includes a source lumen extending therethrough which is adapted to accommodate the radioactive source therein.
Claim 4
Dependent Claim
17 words
A centering catheter as in claim 1 , wherein the constricted regions are formed by constriction bands.
Claim 5
Dependent Claim
19 words
A centering catheter as in claim 1 , wherein the constricted regions are formed by heat treating the braid.
Claim 6
Dependent Claim
14 words
A centering catheter as in claim 1 , wherein the fibers comprise polymer fibers.
Claim 7
Dependent Claim
16 words
A centering catheter as in claim 5 , wherein the polymer fibers comprise aramid fiber filaments.
Claim 8
Dependent Claim
15 words
A centering catheter as in claim 1 , wherein the braid support structure is self-expanding.
Claim 9
Dependent Claim
29 words
A centering catheter as in claim 7 , further comprising a tubular member disposed about the catheter and the expandable braid from retaining the braid in a collapsed configuration.
Claim 10
Dependent Claim
105 words
A medical system for treating a vascular site with ionizing radiation via a vascular lumen, comprising: an elongate radiation source; and a centering catheter for centering the radiation source in the vascular lumen, the centering catheter including an elongate shaft having a proximal end, a distal end and a source lumen extending therethrough which is adapted to accommodate the radioactive source therein, an expandable braid support structure connected to the distal end of the elongate shaft for centering the radioactive source within the vascular lumen, the braid structure defining a plurality of constriction regions upon expansion, the braid comprising a plurality of interwoven radio-transparent fibers.
Claim 11
Dependent Claim
105 words
A medical system for treating a vascular site with ionizing radiation via a vascular lumen, comprising: an elongate radiation source; and a centering catheter for centering the radiation source in the vascular lumen, the centering catheter including an elongate shaft having a proximal end, a distal end and a source lumen extending therethrough which is adapted to accommodate the radioactive source therein, an expandable braid support structure connected to the distal end of the elongate shaft for centering the radioactive source within the vascular lumen, the braid structure defining a plurality of constriction regions upon expansion, the braid comprising a plurality of interwoven radio-transparent fibers.
Claim 12
Dependent Claim
17 words
A medical system as in claim 9 , wherein the constricted regions are formed by constriction bands.
Claim 13
Dependent Claim
19 words
A medical system as in claim 9 , wherein the constricted regions are formed by heat treating the braid.
Claim 14
Dependent Claim
14 words
A medical system as in claim 9 , wherein the fibers comprise polymer fibers.
Claim 15
Dependent Claim
16 words
A medical system as in claim 12 , wherein the polymer fibers comprise aramid fiber filaments.
Claim 16
Dependent Claim
15 words
A medical system as in claim 9 , wherein the braid support structure is self-expanding.
Claim 17
Dependent Claim
29 words
A medical system as in claim 14 , further comprising a tubular member disposed about the catheter and the expandable braid from retaining the braid in a collapsed configuration.
Claim 18
Dependent Claim
104 words
A centering catheter for centering a radiation source in a vascular lumen, comprising: an elongate shaft having a proximal end, a distal end a source lumen extending therethrough which is adapted to accommodate the radioactive source therein; an expandable braid support structure connected to the distal end of the elongate shaft for centering the source lumen and radioactive source within the vascular lumen, the braid comprising a plurality of interwoven radio-transparent polymer fibers; and a plurality of spaced apart constriction members disposed on the braid support structure for defining a plurality of constricted regions along the braid support structure when the braid is expanded.
Claim 19
Dependent Claim
104 words
A centering catheter for centering a radiation source in a vascular lumen, comprising: an elongate shaft having a proximal end, a distal end a source lumen extending therethrough which is adapted to accommodate the radioactive source therein; an expandable braid support structure connected to the distal end of the elongate shaft for centering the source lumen and radioactive source within the vascular lumen, the braid comprising a plurality of interwoven radio-transparent polymer fibers; and a plurality of spaced apart constriction members disposed on the braid support structure for defining a plurality of constricted regions along the braid support structure when the braid is expanded.
Claim 20
Dependent Claim
15 words
A centering catheter as in claim 16 , wherein the braid support structure is self-expanding.
Claim 21
Dependent Claim
29 words
A centering catheter as in claim 17 , further comprising a tubular member disposed about the catheter and the expandable braid from retaining the braid in a collapsed configuration.
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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) | 2004-07-30 | 2005-01-29 | 2005-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-07-30 | 2009-01-29 | 2009-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-07-30 | 2013-01-29 | 2013-07-31 | $7700.00 | Window Closed / Lapsed |