| 摘要 |
<p>An ultrasonic surgical handpiece assembly (10) having a generally hollow body (12') with a reduced diameter portion (16') at a free end and an interior surface (17'), an ultrasonic horn (14') coaxially mounted inside the body (12') terminating at the free end and defining a fluid flow passage (15') at the reduced diameter portion (16') and a spiral thread (19) formed in the interior surface (17') at the reduced diameter portion (16') for reducing shearing of a fluid flowing through the fluid flow passage (15') created by an ultrasonic vibration of the horn (14').</p> |
