Calibration technique for non-invasive medical devices
US6865407B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2002 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Feb 17, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1495
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
There is a need for a non-invasive method of calibrating medical devices at the point of care, where the calibration is performed without the removal of blood or bodily fluids. The invention is directed to an approach for calibrating a first non-invasive sensor in which the tissue being measured is modulated in some way so as to after the value of the parameter being measured by the first optical sensor. A second sensor detects another parameter that also changes with the modulation. The second sensor is absolutely calibrated. Where there is a known relationship between the first and second parameters, a calibration may be derived for the first sensor. Such a technique is applicable to calibrating non-invasive sensors for monitoring a wide variety of physiologic parameters including, inter alia, glucose, blood gases, blood electrolytes and blood pH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.