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:
Apr. 24, 1979
Filed:
Mar. 06, 1975
John D Menken, St. Paul, MN (US);
Brian A Brastad, Wayzata, MN (US);
Thomas C Barthel, Becker, MN (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
Apparatus is disclosed for sensing and transmitting the stimulating pulse of an implanted pacemaker over readily available, low-bandwidth transmission media to a remote receiver capable of measuring the pulse width to provide an indication of the condition of the pacemaker energy source, e.g. a battery. In particular, the sensing and transmitting apparatus detects the electrical activity, e.g. the EKG, of a patient through attached electrodes and modulates a carrier or tone of a suitable frequency to be transmitted over the low-bandwidth transmission medium to the receiver, along with a pulse signal multiplied by a selected, fixed factor dependent upon the carrier frequency of the signal and the other information to be transmitted to the receiver. Illustratively, a factor in the range of 30-50 is selected where it is desired to transmit the pulse width of the pacemaker stimulating pulse along with an EKG, to a receiver to be displayed in a manner to permit evaluation of the EKG and of the width of the stimulating pulse. Typically, the patient in which the pacemaker is implanted has a transmitter for transmitting the aforementioned data to a receiver located in the doctor's office, clinic or hospital, whereby a regular check of the pacemaker's energy source may be made by the patient's doctor.