EP 1670355 A1 20060621 - MEASUREMENT OF BLOOD OXYGEN SATURATION
Title (en)
MEASUREMENT OF BLOOD OXYGEN SATURATION
Title (de)
MESSUNG DER SAUERSTOFFSÄTTIGUNG DES BLUTES
Title (fr)
MESURE DE LA SATURATION EN OXYGENE DU SANG
Publication
Application
Priority
- US 2004031321 W 20040924
- GB 0322545 A 20030926
Abstract (en)
[origin: WO2005030049A1] Oxygenation of a subject's blood is determined by sensing an absorption spectrum of light directed either invasively or non-invasively into the blood, and then calculating an oxygenation value by evaluating a cost function of the remitted spectrum relative to at least two pre-determined reference absorption spectra representing different, known levels of blood oxygenation. The source of light (301) preferably uses stable, long-life, white LEDs, in which case white-balancing of the remitted spectrum can be accomplished by pre-determining and storing the spectrum of the LEDs, one time for all, and then adjusting the remitted spectrum accordingly to compensate for deviations of the LED spectrum from the constant ideal.
IPC 1-7
IPC 8 full level
A61B 5/00 (2006.01)
CPC (source: EP)
A61B 5/14551 (2013.01)
Citation (search report)
See references of WO 2005030049A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005030049 A1 20050407; AU 2004275800 A1 20050407; CA 2538571 A1 20050407; EP 1670355 A1 20060621; GB 0322545 D0 20031029; JP 2007506522 A 20070322
DOCDB simple family (application)
US 2004031321 W 20040924; AU 2004275800 A 20040924; CA 2538571 A 20040924; EP 04784948 A 20040924; GB 0322545 A 20030926; JP 2006528188 A 20040924