Ultrasonic lithotrity apparatus
US4803995A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1987 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Jun 19, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/899
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic lithotrity apparatus is held such that its installation position can be adjusted with respect to a stone formed in a living body, and has an ultrasonic lithotrity transducer for emitting an intense ultrasonic wave for breaking up the stone. The ultrasonic lithotrity transducer emits a weak ultrasonic wave immediately before every single or every predetermined number of intense ultrasonic waves is emitted. The position of a stone in the living body can be determined in accordance with a reflected wave of the weak ultrasonic wave. On the basis of reception of the reflected echo signal, the position of the stone is determined. In accordance with the determination result, electronic circuits determine whether the weak or intense ultrasonic wave is to be emitted from the ultrasonic lithotrity transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.