System using green light to determine parmeters of a cardiovascular system
US6330468A · kind A · utility
250Cited by
35References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1998 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Nov 3, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/14552
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A reflectance pulse oximeter that determines oxygen saturation of hemoglobin using two sources of electromagnetic radiation in the green optical region, which provides the maximum reflectance pulsation spectrum. The use of green light allows placement of an oximetry probe at central body sites (e.g., wrist, thigh, abdomen, forehead, scalp, and back). Preferably, the two green light sources alternately emit light at 560 nm and 577 nm, respectively, which gives the biggest difference in hemoglobin extinction coefficients between deoxyhemoglobin, RHb, and oxyhemoglobin, HbO.sub.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.