Shock-Wave Generating Device, Such as for the Treatment of Calcific Aortic Stenosis
First Claim
Patent Images
1. A shock-wave generating device for invivo removal of deposits from tissue, comprising:
- a) a probe with a proximal end and a distal end, said distal end having a distal tip, said probe comprises;
i) a light-guide configured to guide shock wave-generating light to the distal end of said probe;
b) a light-source directing light into said light-guide, said light-source configured to generate a pulse train which comprises at least one pulse of light, each said pulse of light of a duration of less than 300 ns, which generates a shock wave in an aqueous liquid wherein at least one wavelength of said light is a wavelength having a water absorption coefficient of no less than about 103 cm−
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Abstract
Disclosed is a method for removing deposits from an in vivo tissue, such as removing calcified plaque from a calcified aortic valve by removing the deposits with the help of shock waves produced by a light-source such as a laser in an aqueous liquid in proximity of the tissue as well as a shock-wave generating device useful in implementing the method. Disclosed is a minimally invasive valve-sparing treatment of calcific aortic stenosis.
130 Citations
47 Claims
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1. A shock-wave generating device for invivo removal of deposits from tissue, comprising:
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a) a probe with a proximal end and a distal end, said distal end having a distal tip, said probe comprises; i) a light-guide configured to guide shock wave-generating light to the distal end of said probe; b) a light-source directing light into said light-guide, said light-source configured to generate a pulse train which comprises at least one pulse of light, each said pulse of light of a duration of less than 300 ns, which generates a shock wave in an aqueous liquid wherein at least one wavelength of said light is a wavelength having a water absorption coefficient of no less than about 103 cm−
1. - View Dependent Claims (2, 3, 4, 8, 12, 14, 16, 19, 20, 21, 45, 46, 47)
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5-7. -7. (canceled)
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9-11. -11. (canceled)
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13. (canceled)
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15. (canceled)
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17-18. -18. (canceled)
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22. A method of dislodging plaque from an aortic valve, the method comprising:
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a) providing a cardiac catheter having a distal end and a distal tip, which comprises a light-guide, a distal tip of said light-guide in proximity of a distal end of said catheter; b) placing said distal tip of said light-guide at a distance from a calcified area of said aortic valve; c) guiding a pulse train which comprises at least one pulse of light, each pulse of light of an energy, of a duration and including at least one wavelength of light such as to generate a shock wave in said aqueous liquid at an interface between said distal tip of said light-guide and said aqueous liquid, said pulse train sufficient to dislodge at least some plaque coating from said area, wherein at least one said wavelength is a wavelength having a water absorption coefficient of no less than about 103 cm−
1 andwherein said duration is less than about 300 ns. - View Dependent Claims (23, 24, 25, 28, 29, 30, 31, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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26-27. -27. (canceled)
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32-33. -33. (canceled)
Specification