Optical non-invasive blood monitoring system and method
US8326390B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Sep 20, 2008 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Sep 6, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/6838
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A simple noninvasive technique that is capable of very accurate and fast blood analyte, e.g., glucose, level monitoring is provided. Fluctuation in the levels of glucose and other analytes affect the refractive index of blood and extra cellular fluid in biological tissue. Given that the propagation speed of light through a medium depends on its refractive index, continuous monitoring of analyte levels in tissue is achieved by measuring characteristics of the tissue that can be correlated to the refractive index of the tissue. For instance, the frequency or number of optical pulse circulations that are transmitted through an individual's tissue of known thickness within a certain time period can be correlated to an individual's blood glucose level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.