Patents Examined by Emily Wachtel
  • Dialysis valve and method
    Patent number: 7540859
    Abstract: A dialysis valve includes a tube attached between an artery and a vein which, when elongated, simultaneously narrows in diameter at at least one location. The narrowed portion of the tube decreases the volume and velocity between the arterial and venous side of the patient to prevent damage or intimal hyperplasia on the venous side between dialysis treatments. When the valve is opened for dialysis, an unrestricted blood flow exists between the arterial and venous side, permitting a controlled, open blood flow during dialysis.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: June 2, 2009
    Assignee: INTERRAD Medical, Inc.
    Inventors: Timothy J. Claude, Edward A. Barlow, David W. Hunter, Michael S. Rosenberg