Spark gap unit for lithotripsy

Details Spark gap unit for lithotripsy Spark gap unit for lithotripsy

1991-05-17

1993-03-23

Cohen, Lee S.

Surgery

Truss

Perineal

606128, 367147, 313141, A61B 1722

Patent

active

051955083

ABSTRACT:
A spark gap unit that is easy to manufacture and significantly lighter than previously used spark gap units for generating underwater shock waves, particularly for non-invasive lithotrispy, has an internal conductor with an inner electrode, an insulation which at least partially envelops the internal conductor, and an external conductor with a bow and an outer electrode. The internal conductor is significantly shorter than the external conductor, and the external conductor at the rearward end of the spark gap unit projects beyond the internal conductor. The internal conductor, the insulation, and the external conductor are coaxially arranged. An outside diameter of the internal conductor is relatively small in comparison to an inside diameter of the external conductor. The spark gap unit has a hollow space inside the insulation, this hollow space being open in the direction of a rearward end of the spark gap unit. In the opposite direction from the rearward end, the hollow space is bounded by the internal conductor itself and the envelopment of the internal conductor by the insulation.

REFERENCES:
patent: 4580894 (1986-04-01), Wojcik
patent: 4608983 (1986-09-01), Muller et al.
patent: 4809682 (1989-03-01), Forssmann et al.
patent: 4938781 (1990-07-01), Pimiskern
patent: 4940050 (1990-07-01), Forssmann et al.

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