Apparatus for the non-intrusive fragmentation of renal calculi, gallstones or the like
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United States of America Patent
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May 11, 1993
Issued Date -
N/A
app pub date -
Jan 30, 1992
filing date -
Oct 2, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The apparatus for the non-intrusive fragmentation of renal calculi, gallstones or the like according to the invention comprises at least one ultrasonic receiver-transmitter head (12) focused on the renal calculus (11), gallstone or the like to be disintegrated, a head (12) being associated with a low-power variable frequency transmitter (16) and with a receiver (18) to perform a spectral analysis of the characteristic resonance frequencies of the renal calculus (11), gallstone or the like to be disintegrated, and a controller (Tx1, OSC1) to cause a transmitter (16) to emit relatively high-power energy peaks at the characteristic resonance frequencies of the renal calculus (11), gallstone or the like to promote its disintegration.
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