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:
Jan. 31, 2006
Filed:
Jun. 19, 2003
Christof Muz, Reutlingen, DE;
Edwin Muz, Reutlingen, DE;
Christof Muz, Reutlingen, DE;
Edwin Muz, Reutlingen, DE;
Nicolay Verwaltungs-GmbH, Nagold, DE;
Abstract
A process and a device are provided for determining the proportion of a component of the air exhaled by a breathing living being that is characteristic of the metabolic function of such living being. The invention relates to a process for determination of a first component Ain the air exhaled by a patient that is characteristic of the metabolic function of the patient such as carbon dioxide (CO) or oxygen (O), where the exhaled air having at least two components (i=1, 2, . . . ) each having a proportion A. The molecular weights M; and the adiabatic coefficients kof the components are known. The process measures the velocity of sound vin the exhaled air, and the portion Aof the first component in the exhaled air is calculated by use of the measured velocity, at a temperature T of the exhaled air. The proportion of the component is determined by the equation M/k=R×T/(v), where M=sum(A×M), i=1, 2, . . . , and where Mis the molecular weight of the exhaled air, and 1/(1−k)=sum(A/(1−k)), i=1, 2, . . . , where kis the adiabatic coefficient, and R is the universal gas constant.