Lithotripter cushion

Details Lithotripter cushion Lithotripter cushion

1990-08-22

1992-06-30

Cohen, Lee S.

Surgery

Truss

Perineal

A61B 1722

Patent

active

051253976

ABSTRACT:
A cushion is provided in combination with a truncated ellipsoidal lithotripter reflector. The reflector is open at one end, and this end is closed by a diaphragm. The reflector is filled with liquid and a spark gap is provided at the first focus point of the reflector. The second focus point of the ellipsoidal reflector is intended to be positioned coincident with a bodily concretion such as a kidney stone. This cannot always be done with the diaphragm extended to engage the body in which the concretion is located. Thus, the present invention provides in combination with the foregoing a flexible cushion having one end engaging the diaphragm, and the other end thereof being adapted to engage the body having the concretion. A strap or the like encircles the sidewall of the cushion, and the strap is tightened or loosened to increase or decrease the axial length of the cushion, and thereby to provide fluid communication between the spark gap and the concretion.

REFERENCES:
patent: 4539989 (1985-09-01), Forssmann et al.
patent: 4630607 (1986-12-01), Duinker et al.
patent: 4718421 (1988-01-01), Rohwedder et al.
patent: 4805600 (1989-02-01), Wess et al.
patent: 4813402 (1989-03-01), Reichenberger et al.
patent: 4840166 (1989-06-01), Naser et al.
patent: 4858597 (1989-08-01), Kurtze et al.
patent: 4998528 (1991-03-01), Erhardt

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