System and method for surface acoustic wave treatment of medical devices

摘要

Methods and systems are provided for treatment of medical devices using surface acoustic waves (SAW) of Rayleigh, “pseudo” Rayleigh and Lamb type. In some embodiments, use of such SAW is controlled such that relative velocity of bacteria is achieved wherein the vibration amplitude of the bacteria is smaller than a Z-potential repulsive zone of the bacteria, thus preventing biofilm formation on the medical devices. In some embodiments, systems of the present invention are powered by body movements, and may also provide a feedback loop for control of parameters. In some embodiments, the medical devices of the present invention are comprised of piezoelectric material, and act as self-actuators for the system.

主权项

1. A method for treatment of a surface of an indwelling medical device to prevent attachment of bacteria thereto, the method comprising:
providing an actuator for producing surface acoustic waves (SAW) on a surface of the medical device and a processor for controlling parameters of said actuator; producing elliptical motion of particles on the surface of the medical device by activating said actuator and thereby producing said SAW, wherein said elliptical motion causes vibration of bacteria on the surface of the medical device at a particular vibration amplitude relative to vibration of the surface of the medical device; and controlling parameters of said actuator via said processor such that the vibration amplitude of the bacteria is smaller than a Z-potential repulsive zone of the surface of the medical device, such that said SAW inhibit attachment of bacteria to the surface of the medical device.