Optical determination of in vivo properties
US7225005B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Jan 25, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/742
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method for determining an in vivo property of a tissue or blood is described. The in vivo property may be a hematocrit value, a hemoglobin concentration, or a combination thereof. The system can automatically determine a location of a subcutaneous blood vessel. Based on the automatically determined location, the system illuminates the blood vessel with a light beam and detects light resulting from the illumination. The system determines the in vivo property based on the detected light. Alternatively, or in combination, the system displays an image corresponding to a spatial relationship between a subcutaneous blood vessel and a light beam. Based on the image, an operator can adjust the light beam with respect to the blood vessel to have a selected spatial relationship. The system determines an in vivo property based on the illumination of the blood vessel when the light beam has the selected spatial relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.