Resources Contact Us Home
Lithotripter with locating system integrated therewith and method for its use

Image Number 2 for United States Patent #4834106.

A lithotripter for disintegrating a calculus in the body of a patient has a shock wave source which emits shock wave pulses which are focussed to the calculus by an acoustic lens. As seen in the propagation direction of the shock wave pulses, a semi-transmissive acoustic mirror is disposed in front of the acoustic lens at a fixed angle. An ultrasound transducer, which is part of an ultrasound locating system, such as an ultrasound sector scanner, is disposed laterally with respect to the acoustic mirror, so that ultrasound waves are transmitted by the transducer to the calculus, and the reflected waves are transmitted from the calculus to the transducer, reflected by the acoustic mirror. Shock wave pulses from the shock wave source are only minimally impeded by the mirror, so that the therapy is substantially uninfluenced by the presence of the mirror. The ultrasound signals are used to identify the position of the calculus in the patient, so that the position can be continuously observed, even during the time in which the shock pulses are acting on the calculus. The approach path of the shock wave pulse to the calculus can also be ultrasonically monitored.

  Recently Added Patents
Method for distributing advertisements to client devices using an obscured ad monitoring function
Target output device and extreme ultraviolet light source apparatus
Projection illumination system for EUV microlithography
Method and apparatus for storing email messages
Method for editing a media clip in a mobile terminal device, a terminal device utilizing the method and program means for implementing the method
Autonomous primary-mirror synchronized reset
Uplink interference mitigation method and apparatus
  Randomly Featured Patents
Self-locking mounting bolt systems for furniture
Drum head retention ring with J-slots
Wash fluid containment system
Self-powered biosensor
Circuit for limiting the current in a power transistor
Capacitor over bitline DRAM cell
Apparatus to reduce wasting of unused photoresist in semiconductor containers
Method and apparatus for reducing earthquake damage in developing nations using recycled tires
Sugar-based polymers
Apparatus for generating a balanced calorically limited menu