A system comprising: a delivery device adapted to deliver ultrasonic energy to pathologic musculoskeletal tissue, the device including: a housing portion defining a compartment and having an aspiration conduit and an irrigation conduit; an ultrasonic transducer disposed in the compartment of the housing portion and adapted to translate a power signal to ultrasonic energy; a tip portion coupled to the housing portion, the tip portion adapted to deliver fluid coming through the irrigation conduit to a musculoskeletal tissue site and to deliver detritus coming from the musculoskeletal tissue site through the aspiration channel, the tip portion including: a cannula having a proximal portion and a distal portion, the cannula being coupled to the ultrasonic transducer to receive ultrasonic energy from the ultrasonic transducer and deliver the ultrasonic energy to the musculoskeletal tissue site; and a sleeve adapted for percutaneous insertion and forming a lumen receiving the proximal portion of the cannula; and a controller adapted to deliver the power signal to the ultrasonic transducer; characterized in that the delivery device has been pre-tuned to deliver an ultrasonic energy frequency from 25 kHz to 29 kHz to debride pathologic musculoskeletal tissue. a delivery device adapted to deliver ultrasonic energy to pathologic musculoskeletal tissue, the device including: a housing portion defining a compartment and having an aspiration conduit and an irrigation conduit; an ultrasonic transducer disposed in the compartment of the housing portion and adapted to translate a power signal to ultrasonic energy; a tip portion coupled to the housing portion, the tip portion adapted to deliver fluid coming through the irrigation conduit to a musculoskeletal tissue site and to deliver detritus coming from the musculoskeletal tissue site through the aspiration channel, the tip portion including: a cannula having a proximal portion and a distal portion, the cannula being coupled to the ultrasonic transducer to receive ultrasonic energy from the ultrasonic transducer and deliver the ultrasonic energy to the musculoskeletal tissue site; and a sleeve adapted for percutaneous insertion and forming a lumen receiving the proximal portion of the cannula; and a housing portion defining a compartment and having an aspiration conduit and an irrigation conduit; an ultrasonic transducer disposed in the compartment of the housing portion and adapted to translate a power signal to ultrasonic energy; a tip portion coupled to the housing portion, the tip portion adapted to deliver fluid coming through the irrigation conduit to a musculoskeletal tissue site and to deliver detritus coming from the musculoskeletal tissue site through the aspiration channel, the tip portion including: a cannula having a proximal portion and a distal portion, the cannula being coupled to the ultrasonic transducer to receive ultrasonic energy from the ultrasonic transducer and deliver the ultrasonic energy to the musculoskeletal tissue site; and a sleeve adapted for percutaneous insertion and forming a lumen receiving the proximal portion of the cannula; and a controller adapted to deliver the power signal to the ultrasonic transducer; characterized in that the delivery device has been pre-tuned to deliver an ultrasonic energy frequency from 25 kHz to 29 kHz to debride pathologic musculoskeletal tissue.