Non-invasive, miniature, breath monitoring apparatus
US6955652B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2003 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Jul 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/398
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rugged, miniature, spectroscopic gas analyzer apparatus for rapid, non-invasive, multi-component breath monitoring and analysis and subsequent determination of Q or other medical diagnostic applications. The system is comprised of one or more IR emitters focussed by optical elements through a low volume sample cell receiving a sample input of a patient's breath for analysis. The patient either at rest or during exercise, inhales C2H2—SF6 mixtures (balance of oxygen and nitrogen) which is subsequently monitored upon exhalation for CO2, H2O, C2H2, and SF6 which can be employed to determine Q directly and accurately. Measurements are performed in real-time or via post-processing of stored original data. Due to its small size, ruggedness, and low power consumption, the monitor can conveniently be employed in the field or data can also be retrieved remotely using telemetry. The miniature analyzer operates on the principle of infrared absorption spectroscopy and allows very precise concentration measurements of the analytes of interest, without any bias or interference from other matrix components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.