A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 17/00 (2006.01)
Patent
CA 2050916
-12- ABSTRACT OF THE DISCLOSURE Method and apparatus for fracturing hard deposits such as urinary and biliary stones and atherosclerotic plaque in the human body. A flexible guide having a hard mass capping an end is adapted for insertion through a fluid passage in a living body. An energy source creates a rapid vapor expansion adjacent to the cap causing it to undergo a pulse like movement, imparting a high-velocity impulse to an adjacent deposit, thereby fracturing it. The energy source may be a laser with a fiber optic delivery system in the guide terminating adjacent to the cap to cause vaporization of the mass cap to create the vapor expansion. The energy source may be a spark generator with a conductor associated with the guide to deliver a fluid vaporizing spark adjacent to the mass cap. Other forms of rapid energy delivery such as chemical detonations or ballistic impact may also be applicable.
Bhatta Krishna M.
Dretler Stephen P.
Petschek Harry
Rosen David I.
Physical Sciences Inc.
Riches Mckenzie & Herbert Llp
The General Hospital Corporation
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