**3. Available devices**

There are many devices now on the market to treat vascular thromboses and in particular venous thrombosis. Various types of endovascular devices are now on the market for venous thrombolysis. These include the Unifuse and Speed-Lyser infusion catheters (Angiodynamics, Queensbury, New York), Possis AngioJet Ultra thrombectomy system (Medrad, Minneapolis, Minnesota), EKOS endowave endovascular system (EKOS Corporation, Bothell, WA), Trellis peripheral infusion system (Bacchus Vascular, Santa Clara, CA), Spectranetics Turbo Elite Laser Ablation catheter (Spectranetics, Colorado Springs, CO) and a pure aspiration catheter called the Pronto Extraction catheter (Vascular Solutions, Minneapolis, MN).

There are three different types of catheter systems. One catheter is just used for thrombolytic drug infusion (Speed-Lyser and Uni-Fuse). The second sets of catheter systems are combined devices using both mechanical and pharmacological thrombolysis (EKOS endowave, Possis angiojet, and Trellis thrombectomy) The third set of devices use only mechanical thrombectomy (Possis angiojet, Spectranectics laser ablation and Pronto extraction catheter).
