Optical measurement of tissue pH
US5813403A · kind A · utility
140Cited by
8References
54Claims
0Family size
Inventors
Key dates
| Filing date | Nov 8, 1995 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Nov 8, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0086
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides an optical method and apparatus for determining the pH of a tissue. The method includes the step of first irradiating the tissue with optical radiation. The radiation may first pass through skin covering the tissue of interest, or may irradiate the tissue directly. Radiation reflected from the tissue is then collected to determine a reflection spectrum. pH is then determined by comparing this spectrum to a mathematical model relating optical properties to pH of the tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.