Physiological trend monitor
First Claim
Patent Images
1. A physiological trend monitoring method comprising:
- transmitting light having multiple wavelengths into a patient tissue site;
generating a sensor signal responsive to the light after attenuation by pulsatile arterial blood flow within the tissue site;
detecting a blood parameter trend according to the sensor signal; and
generating an alarm according to the blood parameter trend.
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Abstract
A physiological trend monitor has a sensor signal responsive to multiple wavelengths of light transmitted into a tissue site. The transmitted light is detected after attenuation by pulsatile blood flow within the tissue site. A processor has an input responsive to the sensor signal and a physiological parameter output. Features are extracted from the physiological parameter output. Criteria are applied to the features. An alarm output is generated when the criteria are satisfied.
112 Citations
15 Claims
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1. A physiological trend monitoring method comprising:
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transmitting light having multiple wavelengths into a patient tissue site; generating a sensor signal responsive to the light after attenuation by pulsatile arterial blood flow within the tissue site; detecting a blood parameter trend according to the sensor signal; and generating an alarm according to the blood parameter trend. - View Dependent Claims (2, 3, 4, 5)
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6. A physiological trend monitor comprising:
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a sensor signal responsive to multiple wavelengths of light transmitted into a tissue site and detected after attenuation by pulsatile blood flow within the tissue site; a processor having an input responsive to the sensor signal and a physiological parameter output; a plurality of features extracted from the physiological parameter output; a plurality of criteria applied to the features; and an alarm output generated when the criteria are satisfied. - View Dependent Claims (7, 8, 9, 10)
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11. A physiological trend monitor comprising:
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a detector responsive to multiple wavelengths of light transmitted into a tissue site after attenuation by pulsatile blood flow within the tissue site so as to generate a sensor signal; a processor means for calculating a physiological measurement in response to the sensor signal; a pattern extractor means for identifying features of the physiological measurement; a pattern memory means for storing a reference pattern; and a pattern comparator means for triggering an alarm if the identified features match the reference pattern. - View Dependent Claims (12, 13, 14, 15)
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Specification