Patent GB439085A successfully refreshed from Google Patents.
US5902263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for removing stenotic material from stents
Assignee: Prolifix Medical Inc
•
Filing: 1997-12-24
•
Granted: 1999-05-11
•
Expires: 2017-12-24
Abstract
Abstract Apparatus and methods are provided for recanalizing stented regions within the vasculature which have become restenosed. A shearing body is displaced within the stented region in order to dislodge the stenotic material from an interface envelope defined by the inner surface of the stent. Usually, the shearing body will be compliant and sized slightly larger than the stent in order to remove stenotic material substantially uniformly around the entire interface envelope. The shearing body may be in the form of a brush, helical row, spaced-apart disks, solid compressible body, or a variety of other specific configurations.
Inventors
- 👤 Greg R. Patterson
- 👤 G. Ronald Williams
- 👤 James J. Leary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:04
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61B17/22; A61B17/221; A61B17/320725; A61B2017/00017; A61B2017/00022; A61B2017/00026; A61B2017/00115; A61B2017/00119; A61B2017/320004; A61B2017/320012; A61B90/00; A61B90/36; A61B90/37; A61B2090/378; A61B2217/00; A61B2217/002; A61B2217/005; A61F; A61F2/00; A61F2/82
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
103 words
A catheter system comprising: an inner catheter shaft having a proximal end and a distal end; a radially compressible compliant shearing body disposed near the distal end of the inner catheter shaft, wherein the shearing body has a first end and a second end and wherein the shearing body is tapered so that one end is larger than the other; and a sheath having a proximal end, a distal end, and a cavity near the distal end, wherein the inner catheter is slidably coupled to the sheath so that the compliant shearing body can be radially constrained within and released from the cavity.
Claim 2
Dependent Claim
103 words
A catheter system comprising: an inner catheter shaft having a proximal end and a distal end; a radially compressible compliant shearing body disposed near the distal end of the inner catheter shaft, wherein the shearing body has a first end and a second end and wherein the shearing body is tapered so that one end is larger than the other; and a sheath having a proximal end, a distal end, and a cavity near the distal end, wherein the inner catheter is slidably coupled to the sheath so that the compliant shearing body can be radially constrained within and released from the cavity.
Claim 3
Dependent Claim
42 words
A catheter system as in claim 1, further comprising an outer catheter tube having a proximal end, a distal end, and a lumen therethrough, wherein the outer catheter tube comprises a hub at its proximal end, said hub having an aspiration port.
Claim 4
Dependent Claim
25 words
A catheter system as in claim 1, wherein the inner catheter shaft has a guidewire lumen extending from the proximal end to the distal end.
Claim 5
Dependent Claim
76 words
A catheter system as in claim 2, wherein the inner catheter shaft has a diameter in the range from 0.2 mm to 1 mm, the shearing body has a maximum width when radially unconstrained in the range of 2 mm to 5 mm, the sheath cavity has a diameter in the range from 0.75 mm to 2 mm, and the outer catheter tube has a lumen diameter in the range from 1.5 mm to 3 mm.
Claim 6
Dependent Claim
21 words
A catheter system as in claim 1, wherein at least a portion of the shearing body has a generally round cross-section.
Claim 7
Dependent Claim
20 words
A catheter system as in claim 1, wherein at least a portion of the shearing body has a polygonal cross-section.
Claim 8
Dependent Claim
16 words
A catheter system as in claim 1, wherein the shearing body comprises an axially elongate surface.
Claim 9
Dependent Claim
15 words
A catheter system as in claim 1, wherein the shearing body comprises a helical row.
Claim 10
Dependent Claim
18 words
A catheter system as in claim 8, wherein the helical row comprises a helically aligned radially oriented filaments.
Claim 11
Dependent Claim
17 words
A catheter system as in claim 8, wherein the helical row comprises a continuous web of material.
Claim 12
Dependent Claim
14 words
A catheter system as in claim 1, wherein the shearing body comprises a brush.
Claim 13
Dependent Claim
14 words
A catheter system as in claim 1, wherein the shearing body comprises a cage.
Claim 14
Dependent Claim
37 words
A catheter system as in claim 1, wherein the shearing body is compliant with an unconstrained width greater than the width of the sheath cavity so that the shearing body may be radially constrained within said cavity.
Claim 15
Dependent Claim
37 words
A catheter system as in claim 1, wherein the shearing body may be expanded by application of a compressive force in the axial direction, further comprising means for applying an axially compressive force to the shearing body.
Claim 16
Dependent Claim
32 words
A catheter system as in claim 1, further comprising a drive motor assembly which may be coupled to a proximal portion of the inner catheter shaft to rotate the inner catheter shaft.
Claim 17
Dependent Claim
37 words
A catheter system as in claim 15, wherein the drive motor assembly may also be attached to a proximal portion of the sheath, wherein the sheath is held stationary while the inner catheter shaft is rotated therein.
Claim 18
Dependent Claim
54 words
A catheter system as in claim 16, wherein the drive motor assembly permits the inner catheter shaft to be axially translated relative to the sheath so that the compliant shearing body can be released from and drawn into the cavity while the inner catheter shaft and sheath remain coupled to the drive motor assembly.
Claim 19
Dependent Claim
78 words
A catheter system comprising: an inner catheter shaft having a proximal end and a distal end; a radially compressible helical row of radially oriented filaments disposed near the distal end of the inner catheter shaft; and a sheath having a proximal end, a distal end, and a cavity near the distal end, wherein the inner catheter is slidably coupled to the sheath so that the compliant shearing body can be radially constrained within and released from the cavity.
Claim 20
Dependent Claim
78 words
A catheter system comprising: an inner catheter shaft having a proximal end and a distal end; a radially compressible helical row of radially oriented filaments disposed near the distal end of the inner catheter shaft; and a sheath having a proximal end, a distal end, and a cavity near the distal end, wherein the inner catheter is slidably coupled to the sheath so that the compliant shearing body can be radially constrained within and released from the cavity.
Claim 21
Dependent Claim
42 words
A catheter system as in claim 18, further comprising an outer catheter tube having a proximal end, a distal end, and a lumen therethrough, wherein the outer catheter tube comprises a hub at its proximal end, said hub having an aspiration port.
Claim 22
Dependent Claim
25 words
A catheter system as in claim 18, wherein the inner catheter shaft has a guidewire lumen extending from the proximal end to the distal end.
Claim 23
Dependent Claim
76 words
A catheter system as in claim 20, wherein the inner catheter shaft has a diameter in the range from 0.2 mm to 1 mm, the helical row has a maximum width when radially unconstrained in the range of 2 mm to 5 mm, the sheath cavity has a diameter in the range from 0.75 mm to 2 mm, and the outer catheter tube has a lumen diameter in the range from 1.5 mm to 3 mm.
Claim 24
Dependent Claim
21 words
A catheter system as in claim 18, wherein at least a portion of the helical row has a generally round cross-section.
Claim 25
Dependent Claim
20 words
A catheter system as in claim 18, wherein at least a portion of the helical row has a polygonal cross-section.
Claim 26
Dependent Claim
33 words
A catheter system as in claim 18, wherein the helical row is tapered at at least one end, with said one end having a smaller width than other portions of the helical row.
Claim 27
Dependent Claim
37 words
A catheter system as in claim 18, wherein the helical row is compliant with an unconstrained width greater than the width of the sheath cavity so that the shearing body may be radially constrained within said cavity.
Claim 28
Dependent Claim
32 words
A catheter system as in claim 18, further comprising a drive motor assembly which may be coupled to a proximal portion of the inner catheter shaft to rotate the inner catheter shaft.
Claim 29
Dependent Claim
37 words
A catheter system as in claim 26, wherein the drive motor assembly may also be attached to a proximal portion of the sheath, wherein the sheath is held stationary while the inner catheter shaft is rotated therein.
Claim 30
Dependent Claim
54 words
A catheter system as in claim 27, wherein the drive motor assembly permits the inner catheter shaft to be axially translated relative to the sheath so that the compliant shearing body can be released from and drawn into the cavity while the inner catheter shaft and sheath remain coupled to the drive motor assembly.
References Cited (Backward Citations)
US4273128A
Cited
US4445509A
Cited
US5443443A
Cited
US5334211A
Cited
US4894051A
Cited
US4732154A
Cited
US4842579B1
Cited
US4979939A
Cited
US4819634A
Cited
US4842579A
Cited
US4979951A
Cited
US4926858A
Cited
US4653496A
Cited
US4706671A
Cited
US4790812A
Cited
US4794931A
Cited
US5000185A
Cited
US4696667A
Cited
US4728319A
Cited
US4792130A
Cited
US5041082A
Cited
US4723549A
Cited
US4883458A
Cited
US4857045A
Cited
US4867156A
Cited
US4857046A
Cited
US5047040A
Cited
US4850957A
Cited
US4886061A
Cited
US4895560A
Cited
US4890611A
Cited
US5269751A
Cited
US5011488A
Cited
US5423799A
Cited
US4966604A
Cited
US5087265A
Cited
US5078723A
Cited
DE3921071C2
Cited
US5071424A
Cited
US5011489A
Cited
US5116352A
Cited
US5009659A
Cited
US5085662A
Cited
US5030201A
Cited
US5011490A
Cited
US5158564A
Cited
US5209749A
Cited
US5154724A
Cited
US5100424A
Cited
US5402790A
Cited
US5195954A
Cited
US5196024A
Cited
US5320634A
Cited
US5160342A
Cited
US5234451A
Cited
US5217474A
Cited
US5308354A
Cited
US5135483A
Cited
US5376100A
Cited
US5224945A
Cited
US5192291A
Cited
US5176693A
Cited
US5360432A
Cited
US5356418A
Cited
US5643297A
Cited
US5490859A
Cited
US5540707A
Cited
US5318576A
Cited
US5314438A
Cited
US5527326A
Cited
US5370653A
Cited
US5427115A
Cited
US5578018A
Cited
US5535756A
Cited
NL9400027A
Cited
WO1995029626A1
Cited
US5554163A
Cited
US5556408A
Cited
US5681335A
Cited
US5556405A
Cited
WO1997017889A1
Cited
US5702413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-05-10 | 2002-11-09 | 2003-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-05-10 | 2006-11-09 | 2007-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-05-10 | 2010-11-09 | 2011-05-11 | $7700.00 | Window Closed / Lapsed |