Patents Examined by George R. Evanison
  • Method and apparatus to correct for electric field non-uniformity in conductance catheter volumetry
    Patent number: 5971933
    Abstract: A method of determining cardiac volume including the steps of positioning a catheter in a blood-filled chamber of a patient's heart. The catheter comprises an elongated body having a distal end, a proximal end, a plurality of spaced electrodes arrayed on the outer surface of the catheter and spaced apart a predetermined distance from each other to define a distal electrode, a proximal electrode and a plurality of pairs of adjacent electrodes between the distal and proximal electrodes to define volume segments within the chamber.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: October 26, 1999
    Assignees: Cleveland Clinic Foundation, Marquette Medical Systems
    Inventors: Balakrishnan Gopakumaran, John H. Petre, Peter K. Osborn, Paul Schluter