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:
Jun. 17, 2008
Filed:
Dec. 22, 2004
Eun Jong Cha, Heungdeok-Gu, Cheongju-City, Chungcheongbuk-Do, KR;
Shin Won Kang, Suseong-Gu, Daegu-City, KR;
Kyung Ah Kim, Heungdeok-Gu, Cheongji-City, Chungcheongbuk-Do, KR;
Eun Jong Cha, Heungdeok-Gu, Cheongju-City, Chungcheongbuk-Do, KR;
Shin Won Kang, Suseong-Gu, Daegu-City, KR;
Kyung Ah Kim, Heungdeok-Gu, Cheongji-City, Chungcheongbuk-Do, KR;
Other;
Abstract
Disclosed herein is a method of measuring an absolute lung volume. In the method, concentrations of oxygen and carbon dioxide gases are measured and analyzed in respiratory gas, consisting of nitrogen (N), oxygen (O), and carbon dioxide (CO), to indirectly measure a concentration of nitrogen, thereby achieving measurement of absolute lung volume, such as a functional residual capacity. The method comprises connecting a one-way valve to a subject so as to separate an inspiration path from an expiration path, measuring a flow rate of respiratory gas using a flow sensor, which is provided in the expiration path, continuously measuring a concentration (F) of oxygen and a concentration (F) of carbon dioxide using Oand COsensors provided in the expiration path, correcting dynamic characteristics of the concentration (F) of oxygen and the concentration (F) of carbon dioxide so that the dynamic characteristics agree with each other in terms of time, and analyzing oxygen and carbon dioxide gases using the following Equation