Patent US5370608A successfully refreshed from Google Patents.
US5370608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for minimizing restenosis
Assignee: KIPSHIDZE NICKOLAI
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Filing: 1994-05-03
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Granted: 1994-12-06
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Expires: 2014-05-03
Abstract
Abstract Disclosed is a light angioplasty catheter and method for exposing the interior of a body lumen to a source of light. Light exposure may be accomplished prior to, during, or following conventional balloon dilatation. Also disclosed is a method and apparatus for exposing a preselected portion of vessel wall to a source of light. Relatively low energy light exposure has been found by the inventors herein to both inhibit restenosis following dilatation of a stenotic region, and to inhibit vascular spasms whether or not associated with a stenotic region. It may also arrest progress of a stenosis. Methods are also disclosed for cooling the vascular wall to treat a stenosis. Cooling may be accomplished prior to, during, or following dilatation.
Inventors
- 👤 Harvinder Sahota
- 👤 Nickolai Kipshidze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:02
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N5/00; A61N5/06; A61N5/0601; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B2018/2255; A61B2018/2261; A61N2005/002; A61N2005/007
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
140 words
A catheter for insertion into a body lumen having a vascular wall, and exposing the vascular wall to light, comprising: an elongate flexible catheter body having proximal and distal ends; a balloon on the catheter in communication with the proximal end by way of an inflation lumen extending through the catheter body; a light source which generates a restenosis inhibiting amount of light energy below an energy level sufficient to cause significant thermal necrosis to the vascular wall after exposure of the vascular wall to the light for more than one second; and a light aperture positioned about the periphery of the catheter body, said light aperture in communication with said light source, such that light directed from the light source and launched from the light aperture propagates laterally in an arc of light at or below said energy level.
Claim 2
Dependent Claim
140 words
A catheter for insertion into a body lumen having a vascular wall, and exposing the vascular wall to light, comprising: an elongate flexible catheter body having proximal and distal ends; a balloon on the catheter in communication with the proximal end by way of an inflation lumen extending through the catheter body; a light source which generates a restenosis inhibiting amount of light energy below an energy level sufficient to cause significant thermal necrosis to the vascular wall after exposure of the vascular wall to the light for more than one second; and a light aperture positioned about the periphery of the catheter body, said light aperture in communication with said light source, such that light directed from the light source and launched from the light aperture propagates laterally in an arc of light at or below said energy level.
Claim 3
Dependent Claim
26 words
A catheter as in claim 1, wherein said light aperture comprises the distal end of at least one fiber for propagating light from a remote source.
Claim 4
Dependent Claim
19 words
A catheter as in claim 2, wherein said light fiber extends axially throughout the length of the catheter body.
Claim 5
Dependent Claim
16 words
A catheter as in claim 1, wherein said light aperture is disposed proximally of said balloon.
Claim 6
Dependent Claim
16 words
A catheter as in claim 1, wherein said light aperture is disposed distally of said balloon.
Claim 7
Dependent Claim
19 words
A catheter as in claim 1, wherein said light aperture is disposed on the catheter body within said balloon.
Claim 8
Dependent Claim
22 words
A catheter as in claim 1, further comprising a second inflatable balloon on the catheter body, spaced apart from said first balloon.
Claim 9
Dependent Claim
18 words
A catheter as in claim 7, wherein said light aperture is disposed intermediate said first and second balloons.
Claim 10
Dependent Claim
36 words
A catheter as in claim 7, further comprising an infusion port disposed on the catheter body intermediate the first and second balloons, and in fluid communication with an infusion lumen extending proximally through the catheter body.
Claim 11
Dependent Claim
25 words
A catheter as in claim 7, further comprising a second inflation lumen in communication with the second balloon and extending axially through the catheter body.
Claim 12
Dependent Claim
16 words
A catheter as in claim 1, wherein said light source is disposed adjacent the light aperture.
Claim 13
Dependent Claim
29 words
A catheter as in claim 1, further comprising a fiber optic extending axially through the catheter body for propagating light energy from a proximal source to the light aperture.
Claim 14
Dependent Claim
29 words
A catheter as in claim 1, wherein the light source has a power in the range of 5 to 50 milliwatts and a wavelength in the red light range.
Claim 15
Dependent Claim
37 words
A catheter as in claim 1, wherein said light aperture comprises a plurality of light aperture disposed about the periphery of said balloon so as to laterally launch light around the interior circumference of the body lumen.
Claim 16
Dependent Claim
139 words
A catheter for insertion into a body lumen having a vascular wall, and exposing the vascular wall to light, comprising: an elongate flexible catheter body having proximal and distal ends; an inflatable balloon on the catheter body, in fluid communication with an elongate inflation lumen extending axially through the catheter body and adapted to carry inflation media to inflate the balloon; and a light source which generates a restenosis inhibiting amount of light energy below a level sufficient to cause significant thermal necrosis to the vascular wall; and a light aperture on the catheter body and positioned within said inflatable balloon, said light aperture in communication with said light source, such that light directed from the light source and launched from the light apertures propagates laterally from within the balloon through the inflation media and through the balloon wall.
Claim 17
Dependent Claim
139 words
A catheter for insertion into a body lumen having a vascular wall, and exposing the vascular wall to light, comprising: an elongate flexible catheter body having proximal and distal ends; an inflatable balloon on the catheter body, in fluid communication with an elongate inflation lumen extending axially through the catheter body and adapted to carry inflation media to inflate the balloon; and a light source which generates a restenosis inhibiting amount of light energy below a level sufficient to cause significant thermal necrosis to the vascular wall; and a light aperture on the catheter body and positioned within said inflatable balloon, said light aperture in communication with said light source, such that light directed from the light source and launched from the light apertures propagates laterally from within the balloon through the inflation media and through the balloon wall.
Claim 18
Dependent Claim
20 words
The catheter of claim 15, wherein the light source comprises a light source with a wavelength in the red range.
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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) | 1997-12-05 | 1998-06-06 | 1998-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-05 | 2002-06-06 | 2002-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-05 | 2006-06-06 | 2006-12-06 | $7700.00 | Window Closed / Lapsed |