US7354455B2
Expired / Lapsed
US
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Medical stent with a valve and related methods of manufacturing
Assignee: Boston Scientific Scimed Inc
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Filing: 2004-08-05
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Granted: 2008-04-08
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Expires: 2024-08-05
Abstract
Abstract Medical stents having valves and their methods of manufacture are disclosed. The valve may be basket-shaped and formed integral to a medical stent to prevent undesirable backflow across the valve. The valve can be formed by converting the braided wires of the stent, by providing elastomeric material onto a mold or fixture to form an elastomeric valve, or by attaching a gasket valve. The valve is normally closed but configured to allow easy opening in response to a predetermined condition.
Inventors
- 👤 Jonathan S. Stinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:11
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/24; A61F2/2412; A61F2/2418; A61F2/82; A61F2/86; A61F2002/044
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
133 words
A medical stent having an elastomeric valve, comprising: a generally tubular body formed of braided wires having a proximal end portion and a distal end portion; and a normally closed valve made of an elastomeric material and formed integral to the distal end portion of the braided wires, the elastomeric valve having a generally convex outer surface in a normally closed position and is substantially radially symmetric about a longitudinal axis of the tubular body, wherein the elastomeric valve is sufficiently rigid so as to substantially maintain a predetermined shape, wherein the elastomeric valve is configured to open in response to a predetermined condition, wherein the elastomeric valve includes an opening when the valve is in the normally closed position, and wherein said opening is located at a distal end of the valve.
Claim 2
Dependent Claim
133 words
A medical stent having an elastomeric valve, comprising: a generally tubular body formed of braided wires having a proximal end portion and a distal end portion; and a normally closed valve made of an elastomeric material and formed integral to the distal end portion of the braided wires, the elastomeric valve having a generally convex outer surface in a normally closed position and is substantially radially symmetric about a longitudinal axis of the tubular body, wherein the elastomeric valve is sufficiently rigid so as to substantially maintain a predetermined shape, wherein the elastomeric valve is configured to open in response to a predetermined condition, wherein the elastomeric valve includes an opening when the valve is in the normally closed position, and wherein said opening is located at a distal end of the valve.
Claim 3
Dependent Claim
14 words
The medical stent according to claim 1 , wherein the elastomeric valve is basket-shaped.
Claim 4
Dependent Claim
16 words
The medical stent according to claim 1 , wherein the elastomeric valve is a gasket valve.
Claim 5
Dependent Claim
22 words
The medical stent according to claim 1 , wherein at least a portion of the tubular body is provided with a covering.
Claim 6
Dependent Claim
24 words
The medical stent according to claim 4 , wherein the material for the covering is selected from a group of polyurethane, polytetrafluoroethylene, and silicone.
Claim 7
Dependent Claim
22 words
The medical stent according to claim 1 , wherein at least a portion of the elastomeric valve is provided with a covering.
Claim 8
Dependent Claim
24 words
The medical stent according to claim 6 , wherein the material for the covering is selected from a group of polyurethane, polytetrafluoroethylene, and silicone.
Claim 9
Dependent Claim
45 words
The medical stent according to claim 7 , wherein at least a portion of the tubular body is provided with a covering and a material for the covering in the tubular body is the same as the material for the covering in the elastomeric valve.
Claim 10
Dependent Claim
27 words
The medical stent according to claim 1 , wherein the predetermined condition is a predetermined pressure difference between an upstream and a downstream of the elastomeric valve.
Claim 11
Dependent Claim
16 words
The medical stent according to claim 1 , wherein the elastomeric valve is a one-way valve.
Claim 12
Dependent Claim
16 words
The medical stent according to claim 1 , wherein the opening includes at least one slit.
Claim 13
Dependent Claim
22 words
The medical stent according to claim 1 , wherein the stent is configured to be placed in an esophagus of a patient.
Claim 14
Dependent Claim
23 words
The medical stent according to claim 12 , wherein the predetermined condition is a passage of food from the esophagus into the stomach.
Claim 15
Dependent Claim
25 words
The medical stent according to claim 12 , wherein the predetermined condition is a vomiting of a stomach content from the stomach to the esophagus.
Claim 16
Dependent Claim
17 words
The medical stent according to claim 1 , wherein the tubular body has a generally tapered body.
Claim 17
Dependent Claim
125 words
A medical esophageal stent having an elastomeric valve, comprising: a generally tubular body having a proximal end portion and a distal end portion, the tubular body being sized and configured to be placed in an esophagus of a patient; and a normally closed valve made of an elastomeric material and formed integral to the distal end portion of the tubular body, the valve having a generally convex outer surface and is substantially radially symmetric about a longitudinal axis of the tubular body wherein the valve is configured to open in response to a predetermined condition, wherein a valved end of the valve includes an opening when the valve is in a normally closed position, and wherein the opening lacks a cover for closing the opening.
Claim 18
Dependent Claim
125 words
A medical esophageal stent having an elastomeric valve, comprising: a generally tubular body having a proximal end portion and a distal end portion, the tubular body being sized and configured to be placed in an esophagus of a patient; and a normally closed valve made of an elastomeric material and formed integral to the distal end portion of the tubular body, the valve having a generally convex outer surface and is substantially radially symmetric about a longitudinal axis of the tubular body wherein the valve is configured to open in response to a predetermined condition, wherein a valved end of the valve includes an opening when the valve is in a normally closed position, and wherein the opening lacks a cover for closing the opening.
Claim 19
Dependent Claim
25 words
The medical esophageal stent according to claim 16 , wherein at least a portion of the tubular body and valve is provided with a covering.
Claim 20
Dependent Claim
25 words
The medical esophageal stent according to claim 17 , wherein the material for the covering is selected from a group of polyurethane, polytetrafluoroethylene, and silicone.
Claim 21
Dependent Claim
27 words
The medical esophageal stent according to claim 16 , wherein the predetermined condition is a predetermined pressure difference between an upstream and a downstream of the valve.
Claim 22
Dependent Claim
24 words
The medical esophageal stent according to claim 16 , wherein the predetermined condition is a passage of food from the esophagus into the stomach.
Claim 23
Dependent Claim
26 words
The medical esophageal stent according to claim 16 , wherein the predetermined condition is a vomiting of a stomach content from the stomach to the esophagus.
Claim 24
Dependent Claim
16 words
The medical esophageal stent according to claim 16 , wherein the valve is a one-way valve.
Claim 25
Dependent Claim
18 words
The medical esophageal stent according to claim 16 , wherein the tubular body has a generally tapered body.
Claim 26
Dependent Claim
17 words
The medical esophageal stent according to claim 16 , wherein the elastomeric valve is a gasket valve.
Claim 27
Dependent Claim
17 words
The medical esophageal stent according to claim 16 , wherein the opening includes at least one slit.
Claim 28
Dependent Claim
15 words
The medical esophageal stent according to claim 16 , wherein the elastomeric valve is basket-shaped.
Claim 29
Dependent Claim
14 words
The medical stent according to claim 1 , wherein the elastomeric valve lacks wires.
Claim 30
Dependent Claim
19 words
The medical esophageal stent according to claim 16 , wherein the tubular body comprises a plurality of flexible wires.
Claim 31
Dependent Claim
28 words
The medical esophageal stent according to claim 16 , wherein the tubular body comprises an elongate body having a length greater than a diameter of the elongate body.
Claim 32
Dependent Claim
98 words
A medical stent having an elastometric valve, comprising: a generally tubular, radially flexible body having a proximal end portion and a distal end portion; and a normally closed valve made of an elastometric material and formed integral to the distal end portion of the tubular body, the elastometric valve having a generally convex outer surface, wherein the valve is configured to open in response to a predetermined condition, wherein a valve end of the valve includes an opening when the valve is in a normally closed position, and wherein the opening lacks a cover for closing the opening.
Claim 33
Dependent Claim
98 words
A medical stent having an elastometric valve, comprising: a generally tubular, radially flexible body having a proximal end portion and a distal end portion; and a normally closed valve made of an elastometric material and formed integral to the distal end portion of the tubular body, the elastometric valve having a generally convex outer surface, wherein the valve is configured to open in response to a predetermined condition, wherein a valve end of the valve includes an opening when the valve is in a normally closed position, and wherein the opening lacks a cover for closing the opening.
Claim 34
Dependent Claim
24 words
The medical stent according to claim 30 , wherein at least a portion of the tubular body and valve is provided with a covering.
Claim 35
Dependent Claim
24 words
The medical stent according to claim 31 , wherein the material for the covering is selected from a group of polyurethane, polytetrafluoroethylene, and silicone.
Claim 36
Dependent Claim
26 words
The medical stent according to claim 30 , wherein the predetermined condition is a predetermined pressure difference between an upstream and a downstream of the valve.
Claim 37
Dependent Claim
23 words
The medical stent according to claim 30 , wherein the predetermined condition is a passage of food from the esophagus into the stomach.
Claim 38
Dependent Claim
25 words
The medical stent according to claim 30 , wherein the predetermined condition is a vomiting of a stomach content from the stomach to the esophagus.
Claim 39
Dependent Claim
15 words
The medical stent according to claim 30 , wherein the valve is a one-way valve.
Claim 40
Dependent Claim
17 words
The medical stent according to claim 30 , wherein the tubular body has a generally tapered body.
Claim 41
Dependent Claim
16 words
The medical stent according to claim 30 , wherein the elastomeric valve is a gasket valve.
Claim 42
Dependent Claim
16 words
The medical stent according to claim 30 , wherein the opening includes at least one slit.
Claim 43
Dependent Claim
14 words
The medical stent according to claim 30 , wherein the elastomeric valve is basket-shaped.
Claim 44
Dependent Claim
18 words
The medical stent according to claim 30 , wherein the tubular body comprises a plurality of flexible wires.
Claim 45
Dependent Claim
27 words
The medical stent according to claim 30 , wherein the tubular body comprises an elongate body having a length greater than a diameter of the elongate body.
Claim 46
Dependent Claim
25 words
The medical stent according to claim 30 , wherein the tubular body is sized and configured to be placed in an esophagus of a patient.
Claim 47
Dependent Claim
27 words
The medical esophageal stent according to claim 16 , wherein the body is formed of braded wires and the valve is fixedly attached to the braided wires.
Claim 48
Dependent Claim
26 words
The medical stent according to claim 30 , wherein the body is formed of braded wires and the valve is fixedly attached to the braided wires.
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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) | 2011-04-08 | 2011-10-08 | 2012-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-04-08 | 2015-10-08 | 2016-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-04-08 | 2019-10-08 | 2020-04-08 | $7700.00 | Window Closed / Lapsed |