an ultrasonic aspirator includes a body , an aspirator wand extending from the body , a shield to cover the aspirator wand , a removable headpiece removably attached to the aspirator wand , and a guard extending past an end of the headpiece in a direction distal to the body . the aspirator also includes a generator or a detector to generate or detect electrical pulses , light sources , endoscopy , modified body angles , image navigation integration for improved visualization and optimization of the surgical field .