| 摘要 |
A hand-held ultrasonic surgical apparatus (10) with a focusing lens (18) for fragmenting or emulsifying a predetermined volume of a medium located generally near a focal length (26) from a concave surface (19) of the focusing lens (18) without significant heating of the medium, includes a housing (11) to be held, manipulated by a surgeon or physician, and an acoustic assembly (20) mounted within the housing (11). The acoustic assembly (20) has a resonant vibratory frequency that is primarily determined by the length of the acoustic assembly, and an axis (15) along which the ultrasonic vibratory energy is directed. The preferred range for the resonant vibratory frequency to achieve sufficient focusing, and sufficient ultrasonic power to fragment or emulsify tissue is between 100 kHz and 250 kHz. The acoustic assembly (20) includes an ultrasonic motor (12), a rear driver (16), a front driver (17), a compression fastener (28), and a focusing lens (18).
|
