Opto-acoustic recanilization delivery system
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United States of America Patent
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Apr 9, 2002
Grant Date -
N/A
app pub date -
Jan 23, 1998
filing date -
Jan 23, 1998
priority date (Note) -
Expired
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Abstract
Fiber delivered laser pulses emulsify thrombus by mechanical stresses that include a combination of pressure, tension and shear stress. Laser radiation is delivered to the locality of a thrombus and the radiation is absorbed by blood, blood dot, or other present materials. The combination of a leading pressure wave and subsequent vapor bubble cause efficient, emulsification of thrombus. Operating the laser in a low average power mode alleviates potential thermal complications. The laser is operated in a high repetition rate mode to take advantage of ultrasound frequency effects of thrombus dissolution as well as to decrease the total procedure time. Specific parameter ranges for operation are described. The device includes optical fibers surrounding a lumen intended for flow of a cooling agent. The fibers may be arranged concentrically around the lumen to deliver radiation and heat over as large an area as possible. An alternative design approach incorporates the optical fibers into the wall of the guiding catheter and utilizes the catheter lumen as the cooling channel. An eccentric tip enables rotation of the device to address all parts of the vasculature. The eccentricity can be provided via a variety of means: spring dip, balloon, protrusion, etc.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- LAWRENCE LIVERMORE NATIONAL SECURITY, LLC;SELVA MEDICAL, INC.;W. L. GORE & ASSOCIATES, INC.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Benett, William | Livermore, CA | 7 | 559 |
Broughton, Kathryn | Berkeley, CA | 1 | 52 |
Celliers, Peter M | Berkeley, CA | 8 | 553 |
Da, Silva Luiz B | Danville, CA | 67 | 5930 |
Esch, Victor | San Francisco, CA | 17 | 1868 |
London, Richard A | Orinda, CA | 8 | 393 |
Visuri, Steven R | Livermore, CA | 10 | 718 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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