Alleviating pain during extracoporal lithotripsy

US4662375A · kind A · utility

Assignee

• Dornier System GmbH

Inventors

• Wolfgang Hepp · Alzey, DE
• Gerold Heine · Oberuhldingen, DE
• Othmar Wess · Munich, DE
• Ernst H. Marlinghaus · Munderkingen, DE

Key dates

• Filing date: Jun 24, 1985
• Grant date: May 5, 1987
• Expiry date: Jun 24, 2005

Classification

• Technology area (CPC G): Physics
• CPC primary: G10K11/04
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In extracorporal lithotripsy a shock wave that is focussed on a concrement is followed by a pain producing pressure wave. This wave is filtered by means of a membrane bulging inwardly into the focussing chamber, closing the same and having a thickness smaller than the predominant wave length of the shock wave.