Patents by Inventor Michael O. Madsen

Michael O. Madsen 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).

  • Apparatus for determining a location in a body using a catheter and method of using such catheter
    Patent number: 7223247
    Abstract: Method of using an esophageal catheter. A distal end of the catheter is passed through the esophagus into the stomach of a patient. A constant pressure of gas is applied to the catheter. The back pressure of the gas is measured. The distal end of the catheter is pulled from the patient. An increase in the pressure measured is noted. A subsequent decrease in the pressure measured is then noted. The upper boundary of the lower esophageal sphincter is identified as a function of such decrease. The catheter is then used to place a remote monitoring device to the esophagus.
    Type: Grant
    Filed: November 1, 2003
    Date of Patent: May 29, 2007
    Assignee: Medtronic, Inc.
    Inventor: Michael O. Madsen