Arterial blood monitoring probe

Details Arterial blood monitoring probe Arterial blood monitoring probe

A - Human Necessities

61

B

A61B 5/024 (2006.01) A61B 5/00 (2006.01) A61B 5/14 (1995.01)

Patent

CA 2120383

This arterial blood monitoring system takes advantage of the basic statistical property that arterial blood contains a plurality of dominant absorbers, whose measured light absorption spectra appear as a constant over a short interval of time. By measuring the transmitted light as it varies with arterial pulsation at selected wavelengths of light, over a common light path, the relative amount of these dominant absorbers in the arterial blood can noninvasively be determined. To ensure the common light path, a sandwich construction light detector is used.

Ce système de surveillance de la circulation artérielle tire parti d'une réalité statistique de base, à savoir que le sang artériel contient plusieurs absorbeurs dominants, dont les spectres mesurés d'absorption de la lumière semblent demeurer constants pendant un court laps de temps. En mesurant la lumière transmise et ses variations avec le pouls artériel à certaines longues d'onde de la lumière le long d'une voie spectrale, il est possible de déterminer de façon non invasive la quantité relative de ces absorbeurs dominants dans le sang artériel. Pour que la voie spectrale soit la même, un photorécepteur de type sandwich est utilisé.

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