Pulse oximeter sensor with piece-wise function

A - Human Necessities – 61 – B

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A61B 5/00 (2006.01)

Patent

CA 2405825

A memory in a sensor is used to store multiple coefficients for a physiological parameter. In one embodiment, not only are the sensor's specific calibration coefficients stored in a memory in the sensor for the formula to determine oxygen saturation, but multiple sets of coefficients are stored. The multiple sets apply to different ranges of saturation values to provide a better fit to occur by breaking the R to SpO2 relationship up into different pieces, each described by a different function. The different functions can also be according to different formulas for determining oxygen saturation.

Une mémoire dans un capteur est utilisée pour stocker des coefficients multiples pour un paramètre physiologique. Dans un mode de réalisation, non seulement les coefficients d'étalonnage spécifiques du capteur sont stockés dans une mémoire dans le capteur pour la formule servant à déterminer la saturation en oxygène, mais de multiples ensembles de coefficients sont stockés. Les ensembles multiples s'appliquent à différentes plages de valeurs de saturation pour permettre un meilleur ajustement par rupture de la relation de R à SpO2 en différentes parties, chacune décrite par une fonction différente. Ces différentes fonctions peuvent aussi dépendre de différentes formules pour déterminer la saturation en oxygène.

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