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:
Jul. 04, 2006
Filed:
Mar. 04, 2002
Erkki Heinonen, Helsinki, FI;
Jan Ekstrom, Helsinki, FI;
Erkki Heinonen, Helsinki, FI;
Jan Ekstrom, Helsinki, FI;
Instrumentarium Corp., Helsinki, FI;
Abstract
A method for non-invasively determining functional cardiac output (FCO) and/or venous blood COpartial pressure (PvCO). The amount of CO(VCO) released from the blood and end capillary blood COcontent (CcCO) are determined from measurements from exhaled breathing gases. The COcontent of the breathing gases inhaled by the subject is increased and values for VCOand CcCOare obtained. A regression analysis is performed using the obtained VCO, VO, CcCO, and CcCOvalues. The regression line is extrapolated to obtain a value for CcCOwhen (VCO) is zero so that CvCObecomes known. The CvCOthus determined can be inserted in a non-differential form in the Fick equation, along with VCOand CcCOvalues from normal breathing, to determine FCO. To determine PvCO, CvCOis altered in accordance with the amount of oxygen in the venous blood, to correctly indicate PvCO. The continuing validity of the FCO measurement can be examined on a breath-by-breath basis by noting changes in an indicator variable, such as VCOor end tidal COamounts.