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:
Sep. 18, 2012
Filed:
Jan. 08, 2008
Michael Lippert, Ansbach, DE;
Olaf Skerl, Bad Doberan, DE;
Stefan Paule, Drosendorf, DE;
Bernhard Fahn, Nürnberg, DE;
Gerald Czygan, Buckenhof, DE;
Heinrich Reinke, Fürth, DE;
Albrecht Urbaszek, Heroldsbach, DE;
Michael Lippert, Ansbach, DE;
Olaf Skerl, Bad Doberan, DE;
Stefan Paule, Drosendorf, DE;
Bernhard Fahn, Nürnberg, DE;
Gerald Czygan, Buckenhof, DE;
Heinrich Reinke, Fürth, DE;
Albrecht Urbaszek, Heroldsbach, DE;
Biotronik CRM Patent AG, , CH;
Abstract
An implantable medical device has an impedance or admittance determination unit, an alternating current or voltage source, a measuring unit, and an analysis unit which is connected to the alternating current or AC voltage source and the measuring unit to calculate an impedance value or an admittance value at different times. The impedance or admittance determination unit may generate measuring current having two different frequencies (preferably below 100 kHz), and the analysis unit may calculate pairs of impedance or admittance values which are chronologically assigned to one another for different frequencies of the measuring current, and calculate a value for a blood impedance or blood admittance component which is independent of the impedance of the body tissue surrounding a particular blood vessel, The analysis unit may also determine trends in this value over time as an indicator for a change of blood hematocrit value.