System and method for measuring blood urea nitrogen, blood osmolarity, plasma free hemoglobin and tissue water content
US6246894A · kind A · utility
109Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1998 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Feb 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/036
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods are provided for noninvasively measuring the levels of urea, blood osmolarity (or Na.sup.+), plasma free hemoglobin and tissue water content in a patient's blood or tissue. Light of selected wavelengths is passed through blood or body tissue and the transmitted or reflected light is detected and the detected signals can be electronically compared and manipulated to provide the non-invasive, continuous and quantitative display of a patient's blood urea, blood osmolarity (or Na.sup.+), plasma free hemoglobin and tissue water content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.