US5716410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temporary stent and method of use
Assignee: Boston Scientific Scimed Inc
•
Filing: 1995-12-22
•
Granted: 1998-02-10
•
Expires: 2015-12-22
Abstract
Abstract A temporary stent comprises a coil of tubular thermoplastic material and a heating element inside the tubular material, or a film with a metal film resistive heating element coated thereon. A method of temporarily supporting the wall of a vessel comprises the steps of inserting a thermoplastic body having a first outer dimension less than the inside dimension of the vessel into the vessel to the desired support position; heating the thermoplastic above its softening transition temperature and expanding it to a second outer dimension larger than its first outer dimension; cooling the thermoplastic body to below its softening transition temperature while at its second outer dimension; allowing the cooled thermoplastic body to temporarily support the vessel; heating the thermoplastic above its softening transition temperature to soften the thermoplastic; and removing the softened thermoplastic body from the vessel.
Inventors
- 👤 Lixiao Wang
- 👤 Roger Hastings
- 👤 Paul Buscemi
- 👤 Sew-Wah Tay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:54
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/95; A61F2/958; A61F2210/00; A61F2210/0014; A61F2210/0023; A61F2210/0033; A61F2230/00; A61F2230/0002; A61F2230/0017; A61M25/0043; A61M2025/0058; A61M25/1002; A61M2025/1004
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
125 words
A temporary stent for supporting a region of a patient's vessel comprising: an elongate shall having a proximal end and a distal end; and a stenting portion connected to the distal end of said elongate shaft, said stenting portion being circumferentially continuous along its entire length and comprising a resistance wire inside said stenting portion, said stenting portion further comprising thermoplastic polymeric material which is rigid at body temperature and deforms at an elevated temperature greater than body temperature but less than about 100° C., said stenting portion being configured such that at body temperature the stent provides vessel support and at said elevated temperature said stenting portion deforms from said support configuration to a second, smaller removal configuration for transluminal withdrawal from the vessel.
Claim 2
Dependent Claim
125 words
A temporary stent for supporting a region of a patient's vessel comprising: an elongate shall having a proximal end and a distal end; and a stenting portion connected to the distal end of said elongate shaft, said stenting portion being circumferentially continuous along its entire length and comprising a resistance wire inside said stenting portion, said stenting portion further comprising thermoplastic polymeric material which is rigid at body temperature and deforms at an elevated temperature greater than body temperature but less than about 100° C., said stenting portion being configured such that at body temperature the stent provides vessel support and at said elevated temperature said stenting portion deforms from said support configuration to a second, smaller removal configuration for transluminal withdrawal from the vessel.
Claim 3
Dependent Claim
27 words
The temporary stent of claim 1 wherein the stenting portion comprises a polymer with a metal film coating, the metal film coating comprising a resistive heat element.
Claim 4
Dependent Claim
16 words
The temporary stent of claim 1 wherein the thermoplastic comprises a polymer with a heat-set memory.
Claim 5
Dependent Claim
36 words
The temporary stent of claim 3 wherein the stenting portion is made of a tube coiled in a helix, the helix having a heat-set diameter smaller than the diameter of the helix in its support configuration.
Claim 6
Dependent Claim
55 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.; and b) a heating element inside said tubular thermoplastic polymeric material, whereby the coil of thermoplastic polymeric material deforms in response to heat generated by the heating element.
Claim 7
Dependent Claim
55 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.; and b) a heating element inside said tubular thermoplastic polymeric material, whereby the coil of thermoplastic polymeric material deforms in response to heat generated by the heating element.
Claim 8
Dependent Claim
22 words
The temporary stent of claim 5 wherein the thermoplastic material comprises shape-memory polyurethane having a glass transition temperature of about 45°-55° C.
Claim 9
Dependent Claim
41 words
The temporary stent of claim 5 further comprising a withdrawal element connected to the stent of sufficient length to extend proximally out of a patient's body when the stent is transluminally deployed to temporarily support a vessel in the patient's body.
Claim 10
Dependent Claim
59 words
A temporary stent comprising; a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.; and b) an electrical resistance heating element inside said tubular thermoplastic polymeric material, the coil of thermoplastic polymeric material being adapted to deform in response to heat generated by the heating element.
Claim 11
Dependent Claim
59 words
A temporary stent comprising; a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.; and b) an electrical resistance heating element inside said tubular thermoplastic polymeric material, the coil of thermoplastic polymeric material being adapted to deform in response to heat generated by the heating element.
Claim 12
Dependent Claim
84 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C., said tubular material having holes in a wall thereof spaced and sized so as to allow drug delivery through said wall to a vessel during temporary stenting; and b) a heating element inside said tubular thermoplastic polymeric material, the coil of thermoplastic polymeric material being adapted to deform in response to heat generated by the heating element.
Claim 13
Dependent Claim
84 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C., said tubular material having holes in a wall thereof spaced and sized so as to allow drug delivery through said wall to a vessel during temporary stenting; and b) a heating element inside said tubular thermoplastic polymeric material, the coil of thermoplastic polymeric material being adapted to deform in response to heat generated by the heating element.
Claim 14
Dependent Claim
82 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.. said tubular material further comprising a semi-permeable material to allow drug delivery through a wall of the tubular member to a vessel during temporary stenting; and b) a heating element inside said tubular thermoplastic polymeric material, the coil of thermoplastic polymeric material being adapted to deform in response to heat generated by the heating element.
Claim 15
Dependent Claim
82 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.. said tubular material further comprising a semi-permeable material to allow drug delivery through a wall of the tubular member to a vessel during temporary stenting; and b) a heating element inside said tubular thermoplastic polymeric material, the coil of thermoplastic polymeric material being adapted to deform in response to heat generated by the heating element.
Claim 16
Dependent Claim
104 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.; and b) a heating element inside said tubular thermoplastic polymeric material, said heating element comprising a wire, at least a portion of which is insulated, wherein the coil of thermoplastic polymeric material is adapted to deform in response to heat generated by the heating element, and wherein the tubular thermoplastic material contains holes which allow migration of ionized drug from the stent to surrounding tissues upon application of a voltage applied between said wire and the tissue.
Claim 17
Dependent Claim
104 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.; and b) a heating element inside said tubular thermoplastic polymeric material, said heating element comprising a wire, at least a portion of which is insulated, wherein the coil of thermoplastic polymeric material is adapted to deform in response to heat generated by the heating element, and wherein the tubular thermoplastic material contains holes which allow migration of ionized drug from the stent to surrounding tissues upon application of a voltage applied between said wire and the tissue.
Claim 18
Dependent Claim
59 words
A stent, said stent being circumferentially continuous along its entire length and comprising thermoplastic polymeric tubing containing an electrical resistance heating element inside the tubing, whereby heat is applied to the thermoplastic polymeric tubing and the thermoplastic polymeric tubing deforms from a support configuration to a second smaller removal configuration, in response to heat generated by the heating element.
Claim 19
Dependent Claim
59 words
A stent, said stent being circumferentially continuous along its entire length and comprising thermoplastic polymeric tubing containing an electrical resistance heating element inside the tubing, whereby heat is applied to the thermoplastic polymeric tubing and the thermoplastic polymeric tubing deforms from a support configuration to a second smaller removal configuration, in response to heat generated by the heating element.
Claim 20
Dependent Claim
25 words
The stent of claim 12 wherein the stent comprises a polymer with a metal film coating, the metal film coating comprising a resistive heat element.
Claim 21
Dependent Claim
15 words
The stent of claim 12 wherein the thermoplastic comprises a polymer with a heat-set memory.
Claim 22
Dependent Claim
34 words
The stent of claim 14 wherein the stent is made of a tube coiled in a helix, the helix having a heat-set diameter smaller than the diameter of the helix in its support configuration.
Claim 23
Dependent Claim
146 words
A temporary stent for supporting a region of a patient's vessel comprising: an elongate shaft having a proximal end and a distal end; and a circumferentially continuous stenting portion connected to the distal end of said elongate shaft, said stenting portion comprising thermoplastic polymeric material with a heat-set memory, said thermoplastic polymeric material being rigid at body temperature and adapted to deform at an elevated temperature greater than body temperature but less than about 100° C., said stenting portion comprising, in its support configuration, a film wrapped to form a tube, and when heated to said elevated temperature, contracts to a smaller, heat-set size, said stenting portion being configured such that at body temperature the stent provides vessel support and at said elevated temperature said stenting portion is adapted to deform from said support configuration to a second, removal configuration for transluminal withdrawal from the vessel.
Claim 24
Dependent Claim
146 words
A temporary stent for supporting a region of a patient's vessel comprising: an elongate shaft having a proximal end and a distal end; and a circumferentially continuous stenting portion connected to the distal end of said elongate shaft, said stenting portion comprising thermoplastic polymeric material with a heat-set memory, said thermoplastic polymeric material being rigid at body temperature and adapted to deform at an elevated temperature greater than body temperature but less than about 100° C., said stenting portion comprising, in its support configuration, a film wrapped to form a tube, and when heated to said elevated temperature, contracts to a smaller, heat-set size, said stenting portion being configured such that at body temperature the stent provides vessel support and at said elevated temperature said stenting portion is adapted to deform from said support configuration to a second, removal configuration for transluminal withdrawal from the vessel.
Claim 25
Dependent Claim
140 words
A temporary stent for supporting a region of a patient's vessel comprising: an elongate shaft having a proximal end and a distal end; and a circumferentially continuous stenting portion connected to the distal end of said elongate shaft, said stenting portion comprising a thin wall tube of thermoplastic polymeric material with a heat-set memory, said thermoplastic polymeric material being rigid at body temperature and adapted to deform at an elevated temperature greater than body temperature but less than about 100° C., said stenting portion being configured such that at body temperature the stent provides vessel support and at said elevated temperature said stenting portion is adapted to deform from said support configuration to a second, removal confirmation for transluminal withdrawal from the vessel, and wherein said stenting portion when heated to said elevated temperature, contracts to a folded star shape.
Claim 26
Dependent Claim
140 words
A temporary stent for supporting a region of a patient's vessel comprising: an elongate shaft having a proximal end and a distal end; and a circumferentially continuous stenting portion connected to the distal end of said elongate shaft, said stenting portion comprising a thin wall tube of thermoplastic polymeric material with a heat-set memory, said thermoplastic polymeric material being rigid at body temperature and adapted to deform at an elevated temperature greater than body temperature but less than about 100° C., said stenting portion being configured such that at body temperature the stent provides vessel support and at said elevated temperature said stenting portion is adapted to deform from said support configuration to a second, removal confirmation for transluminal withdrawal from the vessel, and wherein said stenting portion when heated to said elevated temperature, contracts to a folded star shape.
Claim 27
Dependent Claim
64 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.; and b) a heating element inside said tubular thermoplastic polymeric material, said heating element comprising a metal film, the coil of thermoplastic polymeric material being adapted to deform in response to heat generated by the heating element.
Claim 28
Dependent Claim
64 words
A temporary stent comprising: a) a coil of tubular thermoplastic polymeric material having a glass transition temperature greater than body temperature but less than about 100° C.; and b) a heating element inside said tubular thermoplastic polymeric material, said heating element comprising a metal film, the coil of thermoplastic polymeric material being adapted to deform in response to heat generated by the heating element.
References Cited (Backward Citations)
US3267007A
Cited
US3466229A
Cited
US3567487A
Cited
US3663260A
Cited
US3767538A
Cited
US3847659A
Cited
US3868956A
Cited
US3898136A
Cited
US4582564A
Cited
US4444848A
Cited
US4395313A
Cited
US4503569A
Cited
US4568413A
Cited
US5067957A
Cited
US4922905A
Cited
US4681110A
Cited
US4649922A
Cited
US4878906A
Cited
US4776844A
Cited
US5250069A
Cited
US4907336A
Cited
US4800882A
Cited
US5041126A
Cited
US5037427A
Cited
US4884557A
Cited
US4795458A
Cited
US4969458A
Cited
US4969890A
Cited
US5242451A
Cited
US4886062A
Cited
EP0312852A1
Cited
US5133732A
Cited
US5019467A
Cited
US4820298A
Cited
US4998539A
Cited
US4950258A
Cited
US4944746A
Cited
US4919133A
Cited
US5092877A
Cited
US5195984A
Cited
US4913141A
Cited
US5037404A
Cited
US4856516A
Cited
US5087244A
Cited
US5163958A
Cited
US5100429A
Cited
US5047028A
Cited
US4990155A
Cited
US5104403A
Cited
US5034001A
Cited
US5002560A
Cited
US5104404A
Cited
US5147385A
Cited
US5078736A
Cited
US5092841A
Cited
US5199951A
Cited
US5108407A
Cited
US5112462A
Cited
US5163952A
Cited
US5178618A
Cited
US5135536A
Cited
US5231989A
Cited
US5536274A
Cited
US5197978A
Cited
US5197978B1
Cited
US5147370A
Cited
US5196103A
Cited
US5169103A
Cited
WO1993006885A1
Cited
US5192297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-09 | 2001-08-11 | 2002-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-09 | 2005-08-11 | 2006-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-09 | 2009-08-11 | 2010-02-10 | $7700.00 | Window Closed / Lapsed |