Myocardial infarction and ischemia detection method and apparatus
US5515859A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1993 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | Aug 24, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3504
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device (10) for detecting a substance in a patient's expired breath (88) such as adenosine indicative of cardiovascular distress. The device (10) shines an infrared light (68) through a chamber (14) containing the breath (88) to a detector (26). The detector (26) measures the intensity of the light (68) at selected frequency corresponding to absorption bands of the substance. Multiple photodetectors (112, 114, 116, 118) at different absorption band frequencies increase the specificity of detection. A reference chamber (16) containing a reference gas and coupled to an infrared photodetector (118) may be used to provide a baseline reference for a quantitative analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.