Probe and a method for use with a probe
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United States of America Patent
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Feb 28, 2012
Grant Date -
Jun 7, 2007
app pub date -
Dec 1, 2006
filing date -
Dec 2, 2005
priority date (Note) -
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Abstract
The invention relates to a probe and a method for use with a probe, which produces signals indicative of the light absorption of arterial blood at least at a first light wave-length and at a second light wavelength. In order to indicate if the probe is not properly attached to a tissue site the method comprises measuring with at a third wave-length. The third wavelength is chosen so that human tissue is less transparent than at the first and second wavelengths.
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