Ultrasonic treatment of pathological tissue
US5209221A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Sep 20, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/22008
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for generating sonic signal forms for limiting, preventing or regressing the growth of pathological tissue comprises an ultrasonic transmission system for transmitting sound waves, focussed on the tissue to be treated, by way of a coupling medium. An ultrasonic signal produced at the focus of the system comprises brief pulses having at least one rarefaction phase with a negative sonic pressure amplitude with a value greater than 2.times.10.sup.5 Pa. The ultrasonic signal is radiated with a carrier frequency exceeding 20 kHz, a sonic pulse duration T of less than 100 .mu.s and a pulse recurrence rate of less than 1/(5T). The device produces controlled cavitation in the tissue to be treated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.