Ultrasonic dissection instruments and methods provide for fluid delivery during subcutaneous dissection. An ultrasonic dissection tool includes a handle, a transducer and a dissecting member. The dissecting member extends from the distal end of the transducer, and a fluid channel system extends from at least the proximal end to the distal end of the dissecting member. The fluid channel system terminates in a port system. The port system may include one or more apertures, one or more channels, and be adapted to transport fluids such as, for example, irrigation fluids, fluids having analgesics, antibiotics, and combinations of fluids and agents.