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. 15, 2005
Filed:
Nov. 27, 2002
Applicants:
Dennis E. Larson, White Bear Township, MN (US);
Douglas R. Daum, Oakdale, MN (US);
Inventors:
Dennis E. Larson, White Bear Township, MN (US);
Douglas R. Daum, Oakdale, MN (US);
Assignee:
Cardiac Pacemakers, Inc., St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G01F001/00 ;
U.S. Cl.
CPC ...
Abstract
A minute ventilation sensing device in which transthoracic impedance is measured to generate an impedance signal from which a ventilation signal is derived, where the ventilation signal is proportional to minute ventilation. An adaptive high pass filter is used to filter the impedance signal into a ventilation band. The pole frequency of the high pass filter is adjusted in accordance with changes in a calculated signal variation parameter.