Visceral fat may be removed from a subject using a cannula (30) that has aninterior cavity and an orifice (37) configuredto permit material to enter the cavity. This is accomplished by generating anegative pressure in the cavity so that a portionof the tissue is drawn into the orifice. Fluid is then delivered in pulses,via a conduit (35), so that the fluid exits the conduit withinthe cavity and impinges against the portion of the tissue that was drawn intothe orifice. The fluid is delivered at a pressure andtemperature that causes the visceral fat to soften, liquefy, or gellify,without damaging the subject's internal organs that are in thevicinity of the visceral fat. The visceral fat that has been softened,liquefied, or gellified is then suctioned away.
