Infrared cholesterol sensor
US5246004A · kind A · utility
34Cited by
23References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1992 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Aug 14, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/043
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems and methods for non-invasive blood analysis are disclosed in which blood is illuminated at a plurality of discrete wavelengths selected from the near infrared spectrum. Measurements of the intensity of reflected or transmitted light at such wavelengths are taken, and an analysis of reflectance or transmittance ratios for various wavelengths is performed. Changes in the ratios can be correlated with specific material properties, such as the concentration of cholesterol in a subject's circulatory system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.