Surgery – Instruments – Means for concretion removal
Patent
1992-01-21
1994-01-25
Aschenbrenner, Peter A.
Surgery
Instruments
Means for concretion removal
606 15, A61B 1722
Patent
active
052812316
ABSTRACT:
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.
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Bhatta Krishna M.
Drexler Stephen P.
Petschek Harry
Rosen David I.
Aschenbrenner Peter A.
Physical Sciences Inc.
The General Hospital Corp.
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