Injury-free coupling and decoupling of therapeutic shock waves

  • US 4,539,989 A
  • Filed: 11/22/1982
  • Issued: 09/10/1985
  • Est. Priority Date: 11/25/1981
  • Status: Expired due to Fees
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First Claim
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1. In an instrument system for destroying concretions in a body of living tissue, having a liquid filled focusing chamber including a focusing surface which is a part of an ellipsoid of rotation, there being a shock wave generator in the focusing chamber at one focus thereof for generating shock waves by means of arc discharges, a first pad filled with degassed water and provided for being located between the liquid-filled focusing chamber and a coupling site of the body,the improvement of the system comprising, the front and rear sides of said first pad being composed of shape-adapting, acoustically matched thin foils, the first pad, because of its flexibility, its thinness and the use of transmitting materials, permitting simultaneous introduction of X-rays of ultrasonic waves for locating the concretions and to monitor the success in comminution;

  • a second liquid filled pad similar to the first pad and provided for being located at a body site for acoustically decoupling from the body shock waves having been transmitted through the body, said second pad having a surface area for enclosing a large area of the body and having a rear side;

    a rigid dish; and

    a damping or diffusely reflecting layer fastening the rear side of said second pad to said dish.

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