ULTRASONIC SURGICAL INSTRUMENT WITH COOLING SYSTEM

摘要

An ultrasonic surgical instrument including a blade that treats tissue and a fluid control system to cool the blade by pumping cooling fluid through the blade. The blade defines a blade lumen in fluid contact with an inflow and return conduit of the fluid control system. The inflow conduit defines an open distal end positioned within the blade lumen adjacent the distal end of the blade lumen and the return conduit defines an open distal end positioned within the blade lumen adjacent the proximal end of the blade lumen. The fluid control system may further include a fluid reservoir holding the cooling fluid and an inflow pump. The inflow pump is configured to deliver the fluid from the fluid reservoir, through the inflow conduit and the blade lumen, and into return conduit.

主权项

1. An ultrasonic surgical instrument, comprising:
a handle assembly; an elongated body extending distally from the handle assembly; a waveguide extending at least partially through the elongated body; a tool assembly including a blade coupled to a distal end of the waveguide, the blade defining a blade lumen, the blade lumen having closed proximal and distal ends, the blade defining an output in communication with the blade lumen towards the proximal end of the blade lumen; an inflow conduit entering the blade lumen via the output and extending distally through the blade lumen, the inflow conduit defining an open distal end positioned within the blade lumen adjacent the distal end of the blade lumen; and a return conduit defining an open distal end positioned within the blade lumen adjacent the proximal end of the blade lumen, the return conduit exiting the blade lumen via the output and extending proximally therefrom.