The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 1990
Filed:
Feb. 13, 1989
Brian D Pederson, St. Paul, MN (US);
Rodney W Salo, Fridley, MN (US);
Cardiac Pacemakers, Inc., St. Paul, MN (US);
Abstract
A method for matching the distance spanned by a plurality of surface electrodes on an impedance measuring catheter to the size of a ventricular chamber to be measured is disclosed. The catheter includes a plurality of longitudinally spaced electrodes extending from its distal end and spanning a distance known to be greater than the maximum length of a ventricular chamber. With the distal end of the catheter located at the apex of the ventricle, an AC drive signal is applied between the distal electrode and a proximal electrode known to be outside of the ventricle. By then sensing the resulting voltage between successive adjacent electrode pairs and comparing same, the pair where a different characteristic is exhibited is known to be at the transition between the ventricle and the atrium.