Dornier Medizintechnik Gmbh

Dorinier Medizin Technick Gmbh

Reiner Schultheiss

Herbert Weiler

Othmar Wess

Pavel Novak

Harald Eizenhofer

Peter Buchbauer

Friedrich Ueberle

Michael Muller

Klaus Mechnich

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.

Spark gap unit for lithotripsy

Apparatus for positioning the body of a patient in relation to equipment for contactless comminution of concrements such that the focal point of equipment is made to coincide with a concrement; the patient who lies on a rest which is moved with the patient on it in a longitudinal direction, tilted about it, and moved also laterally and in a direction that is transverse to the longitudinal and lateral directions of movement; a water filled cushion with controlled water level is adapted for interpositioning between the equipment for comminution and focusing, and the patient, a plurality of differently oriented X-ray beams are provided for locating a concrement in the patient and images are marked through a light pen or the like on X-ray monitors; a control provides for homing-in the rest in relation to the comminution equipment such that its focal point coincides with the concrement as previously detected.

Positioning a patient for lithotripsy

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Eching, Germany

Reiner Schultheiss