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. 23, 2013
Filed:
Oct. 14, 2003
LI Wang, White Bear Township, MN (US);
Yong K. Cho, Maple Grove, MN (US);
Kevin Kuehn, Shoreview, MN (US);
Glenn C. Zillmer, Hudson, WI (US);
Nirav V. Sheth, Coon Rapids, MN (US);
Li Wang, White Bear Township, MN (US);
Yong K. Cho, Maple Grove, MN (US);
Kevin Kuehn, Shoreview, MN (US);
Glenn C. Zillmer, Hudson, WI (US);
Nirav V. Sheth, Coon Rapids, MN (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
A fluid status monitoring system for use in implantable cardiac stimulation or monitoring devices is provided for monitoring changes in thoracic fluid content. A fluid status monitor includes excitation pulse generating and control circuitry, and voltage and current measurement and control circuitry for performing a series of cardiac-gated, intra-thoracic impedance measurements. The cardiac-gated measurements are filtered or time-averaged to provide a fluid status impedance value, with respiratory noise removed. Based on comparative analysis of the fluid status impedance value, a clinically relevant trend in fluid status may be tentatively diagnosed and a fluid status response provided. Cross-check intra-thoracic impedance measurements performed using the same or a different excitation pathway and a different measurement pathway than the primary intra-thoracic impedance measurement configuration may be used to verify a tentative diagnosis.