US5287858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotational atherectomy guidewire
Assignee: Pilot Cardiovascular Systems Inc
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Filing: 1992-09-23
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Granted: 1994-02-22
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Expires: 2012-09-23
Abstract
Abstract Disclosed is a guidewire particularly suited for use in rotational atherectomy. The guidewire has increased lateral flexibility in the distal region, and a substantially constant diameter throughout. The exterior diameter at any point is substantially equal to the sum of the diameter of the central core wire, and twice the diameter of the wire of the spring coil, if any, mounted thereon. At proximal portions of the guidewire, the outer spring coil may be deleted.
Inventors
- 👤 Julius G. Hammerslag
- 👤 Vincent Divino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:44
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61M; A61M25/00; A61M25/01; A61M25/09; A61B2017/00535; A61B2017/00553; A61B17/22; A61B2017/22001; A61B2017/22072; A61B2017/22074; A61B2017/320004; A61M2025/09175
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
54 words
A flexible guidewire, comprising: an elongate flexible core wire with a proximal segment having a first diameter and at least one distal segment having a second smaller diameter; and a first coil disposed about the distal segment; wherein the first coil is in contact with the core wire throughout the length of the coil.
Claim 2
Dependent Claim
54 words
A flexible guidewire, comprising: an elongate flexible core wire with a proximal segment having a first diameter and at least one distal segment having a second smaller diameter; and a first coil disposed about the distal segment; wherein the first coil is in contact with the core wire throughout the length of the coil.
Claim 3
Dependent Claim
21 words
A flexible guidewire as in claim 1, wherein the first diameter is substantially equal to the outer diameter of the coil.
Claim 4
Dependent Claim
18 words
A flexible guidewire as in claim 1, wherein the coil is securely affixed t the flexible core wire.
Claim 5
Dependent Claim
15 words
A flexible guidewire as in claim 1, wherein the first diameter is approximately 0.009 inches.
Claim 6
Dependent Claim
26 words
A flexible guidewire as in claim 1, further comprising a tapered extension of the core wire extending distally beyond the distal end of the first coil.
Claim 7
Dependent Claim
16 words
A flexible guidewire as in claim 5, further comprising a second coil surrounding said tapered extension.
Claim 8
Dependent Claim
21 words
A flexible guidewire as in claim 5, wherein the core wire has a diameter of no more than about 0.009 inches.
Claim 9
Dependent Claim
28 words
A flexible guidewire as in claim 1, wherein the first coil comprises wire having a diameter within the range of from about 0.001 inches to about 0.003 inches.
Claim 10
Dependent Claim
81 words
A rotational atherectomy catheter system, comprising: a source of rotational energy; an elongate tubular sleeve having a central lumen extending axially therethrough and rotationally linked to said source; a rotational cutting element on the tubular sleeve; and a guidewire movably disposed within said central lumen, said guidewire having a cutting element support section; wherein said guidewire comprises a core wire and a spring coil wrapped about and in contact with at least the cutting element support section of the core wire.
Claim 11
Dependent Claim
81 words
A rotational atherectomy catheter system, comprising: a source of rotational energy; an elongate tubular sleeve having a central lumen extending axially therethrough and rotationally linked to said source; a rotational cutting element on the tubular sleeve; and a guidewire movably disposed within said central lumen, said guidewire having a cutting element support section; wherein said guidewire comprises a core wire and a spring coil wrapped about and in contact with at least the cutting element support section of the core wire.
Claim 12
Independent Claim
111 words
A method of treating an obstruction in a body lumen, comprising the steps of: introducing a guidewire into the body lumen, said guidewire comprising an elongate core and a coil wrapped around and in contact with at least a rotatable cutting element support section of the core, said coil extending around the core in a first rotational direction; advancing the guidewire to the treatment site; advancing a tubular sleeve over the guidewire and distally to the treatment site, said tubular sleeve having a cutting element thereon; positioning the cutting element over the cutting element support section of the guidewire; and rotating the tubular sleeve around the guidewire to treat the obstruction.
Claim 13
Independent Claim
111 words
A method of treating an obstruction in a body lumen, comprising the steps of: introducing a guidewire into the body lumen, said guidewire comprising an elongate core and a coil wrapped around and in contact with at least a rotatable cutting element support section of the core, said coil extending around the core in a first rotational direction; advancing the guidewire to the treatment site; advancing a tubular sleeve over the guidewire and distally to the treatment site, said tubular sleeve having a cutting element thereon; positioning the cutting element over the cutting element support section of the guidewire; and rotating the tubular sleeve around the guidewire to treat the obstruction.
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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) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |