An improved suction and irrigation system for debriding a tract wound .It includes a suction and irrigation handpiece and a dual lumen suction and irrigation tip that is removably connectible to the handpiece. Our product is?a mechanism, such as a motor driving a pump, creates a pulsating fluid flow. There is a control for varying the pulsation frequency independently of the fluid pressure or rate of flow. Separate pulsatile lavage, irrigation, and aspiration functions are provided. In another aspect, the mechanism for producing the pulsating flow includes a fluid driving means, such as a reciprocating pump, and there is a means for varying the length of stroke of the driving means.