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US5178616A
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Method and apparatus for intravascular laser surgery
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1989-06-06
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Granted: 1993-01-12
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Expires: 2009-06-06
Abstract
Abstract An intravascular laser operating device and method for examining and removing a diseased part in a blood vessel. The device includes a catheter having endoscopic fibers for performing an endoscopy and diagnostic of a diseased part in a blood vessel and laser light projecting fibers for projecting a laser light, a visible guide light, and an excited light to the diseased part. An laser device applies laser light to converting elements. A first wave length converting element converts part of the laser light into the visible guide light, and a second wave length converting element converts a part of the visible guide light into the excited light. The excited light is used for generating a fluorescent spectrum. An image is received representing the condition of the inside of the blood vessel based on image light received by the endoscopic fibers. A spectrum analyzing unit diagnoses the diseased part by obtaining the components of the fluorescent spectrum of the received image light. Then the diseased part is destroyed by the laser light which is positioned using the visible guide light.
Inventors
- 👤 Takafumi Uemiya
- 👤 Shin-ichiro Niwa
- 👤 Koro Yotsuya
- 👤 Ichiro Sogawa
- 👤 Shin-ichi Kanazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:35
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B18/245; A61B17/00; A61B17/22; A61B2017/22051
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
253 words
An intravascular laser operating device for examining and removing a diseased part in a blood vessel comprising: a catheter having endoscopic fibers for performing an endoscopy and diagnosis of a diseased part in a blood vessel and laser light projecting fibers for projecting a laser light, a visible guide light, and an excitation light to the diseased part; a laser device for generating laser light; guide light applying means for applying said laser light, visible guide light, and excitation light to said laser light projecting fibers; said guide light to said laser light projecting fibers; said guide light applying means comprising first and second wave length converting element means; said first wave length converting element means for converting a wavelength of part of the laser light from said laser device into the visible guide light; said second wave length converting element means for converting a wavelength of part of the visible guide light into the excitation light; said excitation light for generating a fluorescent spectrum; an image forming device for obtaining an image representing the condition of the inside of the blood vessel based on image light received by the endoscopic fibers; said image forming device comprising: an optical system for dividing the image light received by the endoscopic fibers into at least a first and second portion, an image receiving means for receiving said first portion of said image light, and spectrum analyzing means for diagnosing the diseased part by obtaining a fluorescent spectrum of said second portion of said image light.
Claim 2
Dependent Claim
253 words
An intravascular laser operating device for examining and removing a diseased part in a blood vessel comprising: a catheter having endoscopic fibers for performing an endoscopy and diagnosis of a diseased part in a blood vessel and laser light projecting fibers for projecting a laser light, a visible guide light, and an excitation light to the diseased part; a laser device for generating laser light; guide light applying means for applying said laser light, visible guide light, and excitation light to said laser light projecting fibers; said guide light to said laser light projecting fibers; said guide light applying means comprising first and second wave length converting element means; said first wave length converting element means for converting a wavelength of part of the laser light from said laser device into the visible guide light; said second wave length converting element means for converting a wavelength of part of the visible guide light into the excitation light; said excitation light for generating a fluorescent spectrum; an image forming device for obtaining an image representing the condition of the inside of the blood vessel based on image light received by the endoscopic fibers; said image forming device comprising: an optical system for dividing the image light received by the endoscopic fibers into at least a first and second portion, an image receiving means for receiving said first portion of said image light, and spectrum analyzing means for diagnosing the diseased part by obtaining a fluorescent spectrum of said second portion of said image light.
Claim 3
Dependent Claim
26 words
The intravascular laser operating device of claim 1, wherein the first and second wave length converting element means are made of second order non-linear optical materials.
Claim 4
Dependent Claim
53 words
The intravascular laser operating device of claim 2, wherein said laser device comprises a laser oscillating means for generating the laser light and laser output control means for controlling the power and pulse intervals of the laser light generated from said laser oscillating means, and said laser oscillating means comprises a YAG laser.
Claim 5
Dependent Claim
22 words
The intravascular laser operating device of claim 1, wherein the excited light for generating the fluorescent spectrum is composed of ultraviolet rays.
Claim 6
Independent Claim
230 words
A method of performing laser surgery on a diseased part in a blood vessel comprising: (a) inserting a catheter into a blood vessel, the catheter having endoscopic fibers for performing an endoscopy and diagnosis of a diseased part in a blood vessel and laser light projecting fibers for projecting a laser light, a visible guide light, and an excitation light to the diseased part; (b) generating laser light with a laser device at a low output power level; (c) converting a wavelength of part of the laser light from the laser device into the visible guide light; (d) converting a wavelength of part of the visible guide light into the excitation light; said excitation light for generating a fluorescent spectrum; (e) applying said laser light, said visible guide light, and said excitation light to said laser light projecting fibers; (f) obtaining a diagnostic image representing the condition of the inside of the blood vessel based on an endoscopic image received by the endoscopic fibers; (g) diagnosing the diseased part by obtaining a fluorescent spectrum of the diagnostic image; (h) if no diseased part is found, advancing the catheter to another portion of the blood vessel and repeating steps (a) through (g); otherwise (i) increasing the output power of the applied laser light to destroy the diseased part; (j) repeating steps (g) through (i) until the diseased part is completely destroyed.
Claim 7
Independent Claim
230 words
A method of performing laser surgery on a diseased part in a blood vessel comprising: (a) inserting a catheter into a blood vessel, the catheter having endoscopic fibers for performing an endoscopy and diagnosis of a diseased part in a blood vessel and laser light projecting fibers for projecting a laser light, a visible guide light, and an excitation light to the diseased part; (b) generating laser light with a laser device at a low output power level; (c) converting a wavelength of part of the laser light from the laser device into the visible guide light; (d) converting a wavelength of part of the visible guide light into the excitation light; said excitation light for generating a fluorescent spectrum; (e) applying said laser light, said visible guide light, and said excitation light to said laser light projecting fibers; (f) obtaining a diagnostic image representing the condition of the inside of the blood vessel based on an endoscopic image received by the endoscopic fibers; (g) diagnosing the diseased part by obtaining a fluorescent spectrum of the diagnostic image; (h) if no diseased part is found, advancing the catheter to another portion of the blood vessel and repeating steps (a) through (g); otherwise (i) increasing the output power of the applied laser light to destroy the diseased part; (j) repeating steps (g) through (i) until the diseased part is completely destroyed.
References Cited (Backward Citations)
JPS5135588A
Cited
US3935472A
Cited
JPS5764049A
Cited
US4408602A
Cited
US4418688A
Cited
US4454882A
Cited
US4784132A
Cited
US4784132B1
Cited
EP0217165A1
Cited
US4791927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-12 | 1996-07-13 | 1997-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-12 | 2000-07-13 | 2001-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-12 | 2004-07-13 | 2005-01-12 | $7700.00 | Window Closed / Lapsed |