Disclosed is an ultrasonic surgical device having a distally/proximallymovable fluid management system consisting of single lumen or multiplelumens.. The invention provides for the delivery of irrigation fluid or theremoval of fluid, debris or vapor from the tissue-effecting portion of theblade while minimizing the loading on the blade. The blades of the surgicaldevice, when excited at a natural blade system frequency, will have modalshapes characterized by longitudinal, transverse and / or torsional motion andwill have nodal locations for these motions at positions along the tissueeffecting length of the blade. The instrument is designed to allow for thefluid management system to be positioned at one or more motion nodes tofacilitate efficient removal of tissue or fluid, which tends to accumulate atsuch nodes of the ultrasonic surgical blades.
