Coaxial location for contact free comminution of concrements

US4705026A · kind A · utility

Assignee

• Dornier System GmbH

Inventors

• Christian Chaussy · Privas, FR
• Wolfgang Hepp · Alzey, DE
• Dick van Rijn · Hergatz, DE
• Bernd Forssmann · Friedrichshafen, DE

Key dates

• Filing date: May 8, 1985
• Grant date: Nov 10, 1987
• Expiry date: May 8, 2005

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61G2210/50
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A concrement in a human body is located by an X-ray system establishing an axis through the concrement; ultrasonic equipment determines a depth coordinate value for the concrement on that axis, and a shock gyrator and focusing system is placed on that established axis for obtaining the comminution. A rest is provided for placing the body in the action zone, and for establishing a second axis in a coordinate system; the third axis is perpendicular to the latter and defines locally the direction of position change for the various types of equipment needed to carry out the aforementioned program.