Device and method for the quantitative determination of nitrogen oxides in exhaled air and application thereof

US7704214B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Klaus Abraham-Fuchs · Erlangen, DE
• Maximilian Fleischer · Ehrenkirchen, DE
• Hans Meixner · Haar, DE
• Eva Rumpel · Erlangen, DE
• Elfriede Simon · Munich, DE

Key dates

• Filing date: Apr 30, 2002
• Grant date: Apr 27, 2010
• Expiry date: Jul 29, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A50/20
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A volumetric flow of an analyte, including exhaled air, is fed to a gas sensor unit by used of gas flow device, which can include various sensors for the determination of nitrogen oxides. An oxidation catalyst is used when using an NO2 sensor, which converts nitrogen monoxide to nitrogen dioxide and the gas sensor unit measures the content of nitrogen dioxide. The nitrogen monoxide content is calculated from the nitrogen dioxide content. In order to eliminate cross-sensitivity moisture and ethanol are also measured. The device can be applied to the determination of nitrogen monoxide content of exhaled air.