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:
Oct. 13, 2009
Filed:
Apr. 26, 2005
John Hatlestad, Maplewood, MN (US);
Boyce Moon, Ham Lake, MN (US);
Jesse W. Hartley, Lino Lakes, MN (US);
Jeffrey E. Stahmann, Ramsey, MN (US);
John Hatlestad, Maplewood, MN (US);
Boyce Moon, Ham Lake, MN (US);
Jesse W. Hartley, Lino Lakes, MN (US);
Jeffrey E. Stahmann, Ramsey, MN (US);
Cardiac Pacemakers, Inc., St. Paul, MN (US);
Abstract
A system includes an implantable medical device that includes a trans-thoracic impedance measurement circuit providing a trans-thoracic impedance signal of a subject. A controller is coupled to the trans-thoracic impedance circuit. The controller extracts a respiration signal from the trans-thoracic impedance signal, measures a breathing volume of the subject using the amplitude of the respiration signal and a breathing volume calibration factor, computes an adjusted breathing volume calibration factor using a reference baseline value of the trans-thoracic impedance and a measured baseline value of the trans-thoracic impedance, and computes a calibrated breathing volume using the adjusted breathing volume calibration factor.