| abstract |
A modular handheld surgical instrument including a modular handle assembly, a modular ultrasonic transducer assembly and a modular shaft assembly is disclosed. The modular handle assembly includes a shift gear translatable between a first position and a second position, wherein when the shift gear is translated to the first position, the surgical instrument is configured to rotate a drive gear of a first shaft of the modular shaft assembly to perform at least one shaft actuation function and when the shift gear is translated to the second position, the surgical instrument is configured to rotate a torque gear of a second shaft of the modular shaft assembly to controllably torque an ultrasonic waveguide of the modular shaft assembly to an ultrasonic transducer of the modular ultrasonic transducer assembly to a predefined torque. |