particularly useful for treating conditions wherein the treatment area dangles or is loose in particular the embodiment of fig5 is useful in gynecological treatments in the embodiment of fig5 the tip 75 of the aspiration sheath or catheter 70 is a rounded end the aspiration sheath or catheter 70 includes a lateral slot or opening 19 on one side the ultrasonic probe 23 with an ultrasonic tip 21 which may include a bevel 20 is mounted for axial sliding movement within the aspiration sheath or catheter 70 at least one aspiration passage 23 is created in the space between the ultrasonic probe 22 and the interior wall of the aspiration sheath or catheter 70 accordingly as suction is applied to the aspiration fitting or luer 13 a negative pressure or suction is formed at the aspiration passage 23 to draw away any destroyed or cavitated plaque and any residual or irrigation fluid at the proximal end of the tip 75 is a grasping surface or backstop 76 this grasping surface or backstop 76 serves as an opposed surface to the ultrasonic tip 21 thereby allowing dangling or loose treatment areas to be grasped during treatment in operation the aspiration sheath or catheter 70 is directed to a treatment area until the dangling or loose treatment area.