US Patent 11458244 Irrigating surgical apparatus with positive pressure fluid

A surgical instrument including an elongated tubular body portion and an irrigation assembly. The elongated tubular body portion extending distally to an end effector and defining an interior cavity. The irrigation assembly includes an inlet port and a shaft assembly supported by the elongated tubular body portion. The inlet port and the shaft assembly are disposed in fluid communication with one another to deliver fluid from the inlet port into the interior cavity of the elongated tubular body portion to irrigate the interior cavity with positive fluid pressure.