Using safe, low frequency soundwaves, SonoSolve has developed a method to agitate regions within a catheter without violating the sterility of the catheter’s interior. This allows physicians or nurses to safely remove obstructing matter from an externally-draining catheter without having to flush it. Our device is hand-held, easy to use, external to the patient and tube system, and adaptable to a variety of externally-draining catheters.