Ultrasonic calculus treatment apparatus
US7229455B2 · kind B2 · utility
393Cited by
13References
6Claims
0Family size
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Key dates
| Filing date | Aug 20, 2002 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Jul 14, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/320098
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ultrasonic calculus treatment apparatus includes a longitudinal-vibration piezoelectric oscillator for vibrating in the axial direction of an ultrasonic transmitting member and a torsional-vibration piezoelectric oscillator for vibrating about the axial direction, and further includes driving circuits for driving the piezoelectric oscillators at respective resonance frequencies and a mode selection switch for permitting the oscillators to vibrate independently or in combination, so that lithotripsy can be performed effectively in accordance with the size of a calculus or a function of an operating tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.