US5984964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prothesis delivery system
Assignee: Boston Scientific Corp
•
Filing: 1996-10-31
•
Granted: 1999-11-16
•
Expires: 2016-10-31
Abstract
Abstract This invention provides prosthesis delivery systems with atraumatic tips that can be dislodged from the catheter so that the catheter can be easily removed from the body after expanding the prosthesis, by pulling the catheter proximally. With the tip dislodged, the catheter, which is of smaller diameter than the tip can be removed even in instances where the prosthesis does not expand the lumen to a large diameter. This invention also provides prosthesis delivery systems with a contoured protective outer sheath having smaller diameters in proximal portions that normally are acutely bent when the system is in the body, than in distal portions corresponding to the position of the prostheses. These systems are more flexible and the sheaths less likely to kink, especially when configured as part of a large delivery system.
Inventors
- 👤 George T. Roberts
- 👤 Darin Wilson
- 👤 Erik Anderson
- 👤 Hans-Peter Strohband
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/962; A61F2/966; A61F2/9517
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
99 words
A device for treating a body lumen, comprising: a prosthesis, self-expandable from a radial compact form, and an elongated catheter having a proximal end that remains outside the body, a distal end, and a supporting portion supporting said prosthesis in said radially compact form, said prosthesis being maintained in said radially compact form on said supporting portion by a degradable material, and an axially slidable sheath for selectively exposing said prosthesis, said sheath being contoured to have a greater diameter in a distal region which may extend over said prosthesis and a smaller diameter in a region proximal thereof.
Claim 2
Independent Claim
99 words
A device for treating a body lumen, comprising: a prosthesis, self-expandable from a radial compact form, and an elongated catheter having a proximal end that remains outside the body, a distal end, and a supporting portion supporting said prosthesis in said radially compact form, said prosthesis being maintained in said radially compact form on said supporting portion by a degradable material, and an axially slidable sheath for selectively exposing said prosthesis, said sheath being contoured to have a greater diameter in a distal region which may extend over said prosthesis and a smaller diameter in a region proximal thereof.
Claim 3
Independent Claim
14 words
The method of claims 1 wherein said sheath has a substantially constant wall thickness.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the wall thickness is about 0.5 mm.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein the prosthesis is expandable to a diameter of 10 mm or more.
Claim 6
Dependent Claim
17 words
The method of claim 4 wherein the prosthesis is expandable to a diameter of about 20 mm.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein said degradable material is body-fluid degradable material.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein the degradable material is gelatin.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein said sheath is a tubular, single-wall polymeric sheath.
Claim 10
Dependent Claim
24 words
The method of claim 1 wherein the proximal portion of the sheath extends substantially the length of the catheter proximal of the supporting portion.
Claim 11
Dependent Claim
12 words
The method of claim 1 wherein the prosthesis includes an elastic wire.
Claim 12
Dependent Claim
33 words
The method of claim 1 wherein the catheter further including a tip which is engaged by said sheath to protect said prosthesis from exposure to body fluid prior to withdrawal of said sheath.
Claim 13
Independent Claim
125 words
A method, comprising: providing a prosthesis, self-expandable from a radial compact form, and an elongated catheter having a proximal end that remains outside the body, a distal end, and a supporting portion supporting said prosthesis in said radially compact form, said prosthesis being maintained in said radially compact form on said supporting portion by a degradable material, and an axially slidable sheath for selectively exposing said prosthesis, said sheath being contoured to have a greater diameter in a distal region which may extend over said prosthesis and a smaller diameter in a region proximal thereof, placing said catheter into a body lumen and positioning said prosthesis at a desired location, sliding said sheath to expose said prosthesis, and withdrawing said catheter from the body lumen.
Claim 14
Independent Claim
125 words
A method, comprising: providing a prosthesis, self-expandable from a radial compact form, and an elongated catheter having a proximal end that remains outside the body, a distal end, and a supporting portion supporting said prosthesis in said radially compact form, said prosthesis being maintained in said radially compact form on said supporting portion by a degradable material, and an axially slidable sheath for selectively exposing said prosthesis, said sheath being contoured to have a greater diameter in a distal region which may extend over said prosthesis and a smaller diameter in a region proximal thereof, placing said catheter into a body lumen and positioning said prosthesis at a desired location, sliding said sheath to expose said prosthesis, and withdrawing said catheter from the body lumen.
Claim 15
Dependent Claim
13 words
The method of claim 12 wherein said degradable material is body-fluid degradable material.
Claim 16
Dependent Claim
11 words
The method of claim 13 wherein the degradable material is gelatin.
Claim 17
Independent Claim
14 words
The method of claims 12 wherein said sheath has a substantially constant wall thickness.
Claim 18
Dependent Claim
13 words
The method of claim 15 wherein the wall thickness is about 0.5 mm.
Claim 19
Dependent Claim
18 words
The method of claim 12 wherein the prosthesis is expandable to a diameter of 10 mm or more.
Claim 20
Dependent Claim
17 words
The method of claim 17 wherein the prosthesis is expandable to a diameter of about 20 mm.
Claim 21
Dependent Claim
14 words
The method of claim 12 wherein said sheath is a tubular, single-wall polymeric sheath.
Claim 22
Dependent Claim
24 words
The method of claim 12 wherein the proximal portion of the sheath extends substantially the length of the catheter proximal of the supporting portion.
Claim 23
Dependent Claim
12 words
The method of claim 12 wherein the prosthesis includes an elastic wire.
Claim 24
Dependent Claim
33 words
The method of claim 12 wherein the catheter further including a tip which is engaged by said sheath to protect said prosthesis from exposure to body fluid prior to withdrawal of said sheath.
Claim 25
Dependent Claim
9 words
The method of claim 12 comprising treating the esophagus.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-11-15 | 2003-05-17 | 2003-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-15 | 2007-05-17 | 2007-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-15 | 2011-05-17 | 2011-11-16 | $7700.00 | Window Closed / Lapsed |