Patent JPS60215868A successfully refreshed from Google Patents.
Patent EP0518704A1 successfully refreshed from Google Patents.
EP0518704A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Temporary stents and method of manufacture
Assignee: Boston Scientific Scimed Inc
•
Filing: 1992-06-15
•
Granted: —
•
Expires: 2012-06-15
Abstract
Abstract A temporary stent (10) for supporting a region of a vessel in a body comprising a composite stent portion (14) and an actuator portion (18) and methods for the use and manufacture thereof. The composite stent portion (14) is comprised of an elongate perfusable vessel supporting portion adapted to be configurable between a reduced size for placement in the vessel and removal therefrom and an expanded size for structurally supporting the vessel and perfusable end portions (30,34) connected to and forming ends of the vessel supporting portion and adapted to allow fluid flow therethrough. The composite stent portion (14) is comprised of a plurality of resilient metallic wires coated with a polymeric material to provide stability for both lifting and maintaining a vessel. A method is disclosed for deployment of the composite stent to maintain vessel patency during occurrence of an intimal flap, vasoconstriction or vasospasm.
Inventors
- 👤 Dale F. Schmaltz
- 👤 Thomas Holman
- 👤 Larry Walter
- 👤 Gary Kostur
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; C25F3/24; A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/95; A61L; A61L31/00; A61L31/08; A61L31/10; A61M; A61M29/00; A61M29/02; A61F2/9517; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30667; A61F2002/30672; A61F2002/30677; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/005; A61F2250/00; A61F2250/0058; A61F2250/0059; A61F2250/0067
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
118 words
A temporary stent for supporting a region of a vessel in a body comprising: a composite stent portion comprised of: an elongate perfusable vessel supporting portion adapted to be configurable between a reduced size for placement in the vessel and removal therefrom and an expanded size for structurally supporting the vessel in the region; and perfusable end portions connected to and forming ends of said vessel supporting portion and adapted to allow fluid flow therethrough; and an actuator portion having a proximal end extending out of the body and a distal end connected to said stent portion and operable by manipulation at said proximal end to configure said support portion into said reduced size and said expanded size.
Claim 2
Dependent Claim
32 words
A temporary stent of Claim 1 in which said stent portion comprises a plurality of wound wires of a metal formed to resiliently return to a configuration conforming to said expanded size.
Claim 3
Dependent Claim
32 words
A temporary stent as claimed in eith of claim 1 or claim 2 in which said stent portion is comprised of a plurality of wound wires of a treatable cobalt-chromium-nickel-molybdenum based alloy.
Claim 4
Dependent Claim
31 words
A temporary stent as claimed in any preceding claim in which said stent portion is comprised of a plurality of wound wires selected from a group consisting of: elgiloy and MP35N.
Claim 5
Dependent Claim
68 words
A temporary stent as claimed in any preceding claim in which said stent portion is comprised of a first set of wires helically wound in a first direction and a second set of wires helically wound in a second direction such that when said vessel supporting portion is in said expanded size, the wires of said first set form acute angles with the wires of said second set.
Claim 6
Dependent Claim
33 words
A temporary stent as claimed in any preceding claim in which said stent portion is comprised of a plurality of wound wires forming a braid having a pick count of less than 16.
Claim 7
Dependent Claim
31 words
A temporary stent as claimed in any preceding claim in which said stent portion is comprised of a plurality of wound wires forming a braid having a pick count of 12.
Claim 8
Dependent Claim
31 words
A temporary stent as claimed in any preceding claim in which said stent portion is comprised of a plurality of wound wires of a diameter of approximately 0.002 to 0.0025 inches.
Claim 9
Dependent Claim
39 words
A temporary stent as claimed in claim 1 in which said composite stent portion is comprised of: a plurality of helically wound wires forming an elongate hollow tube, and a coating applied to the plurality of helically wound wires.
Claim 10
Dependent Claim
45 words
A temporary stent as claimed in claim 9 in which said coating encapsulates and adheres to crossing points of said plurality of helically wound wires thereby allowing relative rotation or wires at said crossing points but preventing translation of the wires at said crossing points.
Claim 11
Dependent Claim
22 words
A temporary stent as claimed in claim 10 in which said coating is formed of a high modulus, high elongation polymeric material.
Claim 12
Dependent Claim
22 words
A temporary stent as claimed in claim 11 in which said coating is selected from a group consisting of: polyurethane and silicone.
Claim 13
Dependent Claim
20 words
A temporary stent as claimed in either of claims 11 or 12 in which said coating is an aliphatic polyurethane.
Claim 14
Dependent Claim
37 words
The temporary stent of any of claims 9 to 13 in which said coating is preferably applied to said plurality of helically wound wires after said plurality of wires has been treared to resume an expanded configuration.
Claim 15
Dependent Claim
24 words
A temporary stent as claimed in any of claims 9 to 14 in which said coating is less than approximately 0.002 inches in thickness.
Claim 16
Dependent Claim
114 words
A temporary stent as claimed in claim 1 wherein said actuator portion comprising: a first elongate member comprising an elongate catheter tube connected to said proximal end of said stent portion, and a second elongate member slidably disposed in s lumen of said first elongate member and extending to and operable to move said distal end of said stent portion with respect to said proximal end of said stent portion; a first marker connected at approximately the diatal of said stent portion; a second marker connected at approximately the proximal end of said stent portion, whereby the length of said stent portion can be determined by observation of said first and said second markers.
Claim 17
Dependent Claim
66 words
A temporary stent as claimed in claim 16 further including: a third marker connected to said second elongate member in a portion corresponding to the stent portion, whereby the relative positions of said first and second elongate members and thereby the size of said vessel supporting portion can be determined by observation of the position of said third marker relative to said first and second markers.
Claim 18
Dependent Claim
44 words
A temporary stent as claimed in claim 17 in which said third marker is connected to said second elongate member at a location such that when said vessel supporting portion is in said expanded size said third marker is proximate to said second marker.
Claim 19
Dependent Claim
23 words
A temporary stent as claimed in any of claims 16, 17 or 18 wherein said markers are made of platinum with 10% iridium.
Claim 20
Dependent Claim
88 words
A temporary stent as claimed in claim 1 wherein said actuator comprises: a first elongate member comprising an elongate catheter tube connected to said proximal end of said stent portion, and a second elongate memebr slidably disposed in a lumen of said first elongate member and extending to and operable to move said distal end of said stent portion with respect to said proximal end of said stent portion, said second elongate member comprised of a material selected from a group consisting of: polyimide, polycarbonate, polyester and PET.
Claim 21
Dependent Claim
24 words
A temporary stent as claimed in claim 20 in which said second elongate member includes a lubricious coating on at least one surface thereof.
Claim 22
Dependent Claim
21 words
A temporary stent as claimed in claim 21 in which said lubricious coating is a hydrophilic coating, paralyene, teflon or silicone.
Claim 23
Dependent Claim
89 words
A temporary stent as claimed in claim 1 wherein said actuator portion comprises: a first elongate member comprising an elongate catheter tube connected to said proximal end of said stent portion, said first elongate member comprised of a material selected from a group consisting of: polyimide, polycarbonate, polyester and PET, and a second elongate member slidably disposed in a lumen of said first elongate member and extending to an operable to move said distal end of said stent portion with respect to said proximal end of said stent portion.
Claim 24
Dependent Claim
25 words
A temporary stent as claimed in claim 23 in which said first elongate member further includes a lubricious coating on at least one surface thereof.
Claim 25
Dependent Claim
21 words
A temporary stent as claimed in claim 23 in which said lubricious coating is a hydrophilic coating, paralyene, teflon or silicone.
Claim 26
Dependent Claim
58 words
A method of manufacturing the temporary stent of claim 1 comprising the steps of: providing an elongate braid of treatable resilient metal wire stands in a size corresponding to a desired expanded size; and treating said braid while in the expanded size to provide the braid with a size configuration to which said braid will tend to resume.
Claim 27
Dependent Claim
21 words
A method as claimed in claim 27 wherein the braid is coated with a polymeric material while in an expanded size.
Claim 28
Dependent Claim
18 words
A method as claimed in claim 28 wherein the polymeric material is applied by spraying, dipping or dispersion.
Claim 29
Independent Claim
19 words
A method as claimed in either of claims 28 or 29 wherein the polymeric material is an aliphatic polyurethane.
Claim 30
Independent Claim
32 words
A method as claimed in any one of claims 28, 29 or 30 wherein the braid is coated with a layer of polymeric material to a thickness of less than 0.002 inches.
Claim 31
Dependent Claim
70 words
A method of manufacturing a temporary stent as claimed in claim 1 comprising the steps of: providing an elongate braid of metal wire stands; positioning the braid with a proximal end thereof on a first catheter member and a distal end thereof on a second catheter member; and winding coils around the proximal and distal ends of the braid to secure the braid to the first and second catheter members.
Claim 32
Dependent Claim
15 words
A method as claimed in claim 32 wherein the wound coils are secured by brazing.
References Cited (Backward Citations)
GB2020557A
Cited
US4629458A
Cited
FR2580504A1
Cited
US4650466A
Cited
EP0321912A1
Cited
DE9010130U1
Cited
FR2652267A1
Cited
EP0433011B1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.