| 摘要 |
An ultrasonic surgical instrument includes a large thumb slide actuator and a handle which is held in to the palm of a surgeon operator to balance the weight of the instrument during usage. The surgeon's thumb is placed upon the thumb slide actuator, thereby facilitating actuation with a pulling-pushing motion of the thumb slide. When the thumb slide is pushed forward in a distal direction, a rotational clamp arm is opened relative to a stationary blade, and when the thumb slide is pulled rearward in a proximal direction, the clamp arm is closed. This arrangement eliminates a problem with steadying the instrument, with the entire thumb resting on the thumb slide, and also eliminates pressure points on the thumb during long transection times. The large thumb slide features a ribbed texture on its upper surface to prevent thumb slippage. The thumb slide is optimized for ergonomic usage with all size hands, with the user being able to initiate an open or close movement from any point on the thumb slide. The thumb slide has a horizontal S shaped design which fits the normal curvature of the thumb to provide greater comfort and control. The thumb slide is actuated proximally and distally along the same arc which the thumb follows naturally when bent proximally and distally at the first knuckle, which provides the surgeon with a natural and familiar actuating movement for greater ease and control.
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