Surgery: kinesitherapy – Kinesitherapy – Contact-free comminution of concretion
Patent
1991-08-01
1994-05-10
Cohen, Lee S.
Surgery: kinesitherapy
Kinesitherapy
Contact-free comminution of concretion
12866003, A61B 1722
Patent
active
053098978
ABSTRACT:
An apparatus for generating acoustic rarefaction pulses, i.e., a negative pressure pulse, has a pressure pulse source and reflector having a negative reflection factor, and an acoustic propagation medium filling the space between the pressure pulse source and the reflector. The reflector has a boundary surface facing toward the pressure pulse source, consisting of a medium which is acoustically soft in comparison to the acoustic propagation medium. The boundary surface medium is separated from the acoustic propagation medium by a wall which is impenetrable by the acoustic propagation medium.
REFERENCES:
patent: 4194510 (1980-03-01), Proudian
patent: 4622969 (1986-11-01), Forssmann et al.
patent: 4697588 (1987-10-01), Reichenberger
patent: 4721108 (1988-01-01), Heine et al.
patent: 4972826 (1990-11-01), Koehler et al.
patent: 5058569 (1991-10-01), Hassler et al.
"Stosswellen in der Medizon" Forsmann et al., Medizin unserer Zeit, vol. 4, No. 1, 1980 pp. 10-14.
Hassler Dietrich
Koehler Georg
Reichenberger Helmut
Schwark Hubert
Cohen Lee S.
Pfaffle K. M.
Siemens Aktiengesellschaft
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