Patents by Inventor Jeffery A. Schweitzer

Jeffery A. Schweitzer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Correction of shift and drift in impedance-based medical device navigation using measured impedances at external patch electrodes
    Patent number: 9610027
    Abstract: A system and method are provided for determining characteristics of a device electrode disposed on a medical device within a body. A plurality of measurement electrodes are coupled to an external surface of the body and establish transmission paths for current through the body. An electronic control unit (ECU) is configured to cause transmission of current between a pair of active electrodes selected from the measurement electrodes and thereby generate a voltage on the device electrode. The ECU receives impedance signals from a plurality of passive electrodes among the measurement electrodes other than the active electrodes. The ECU establishes a virtual reference electrode at a reference position within the body responsive to the impedance signals and computes a position of the device responsive to the voltage on the device electrode and the reference position of the reference electrode. The ECU may also compute impedances at the device and measurement electrodes.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 4, 2017
    Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.
    Inventors: John A. Hauck, Jeffery A. Schweitzer, Lev A. Koyrakh
  • CORRECTION OF SHIFT AND DRIFT IN IMPEDANCE-BASED MEDICAL DEVICE NAVIGATION USING MEASURED IMPEDANCES AT EXTERNAL PATCH ELECTRODES
    Publication number: 20150005624
    Abstract: A system and method are provided for determining characteristics of a device electrode disposed on a medical device within a body. A plurality of measurement electrodes are coupled to an external surface of the body and establish transmission paths for current through the body. An electronic control unit (ECU) is configured to cause transmission of current between a pair of active electrodes selected from the measurement electrodes and thereby generate a voltage on the device electrode. The ECU receives impedance signals from a plurality of passive electrodes among the measurement electrodes other than the active electrodes. The ECU establishes a virtual reference electrode at a reference position within the body responsive to the impedance signals and computes a position of the device responsive to the voltage on the device electrode and the reference position of the reference electrode. The ECU may also compute impedances at the device and measurement electrodes.
    Type: Application
    Filed: August 28, 2014
    Publication date: January 1, 2015
    Inventors: John A. Hauck, Jeffery A. Schweitzer, Lev A. Koyrakh