NONINVASIVE MULTI-PARAMETER PATIENT MONITOR
First Claim
1. A method of determining which of a plurality of physiological measurements to measure based on the signal quality of the signal, the method comprising:
- using a sensor configured to measure at least two different physiological measurements to obtain a signal from a light sensitive detector, the sensor including at least three different light emitters emitting at least three different wavelengths of light through tissue of a living patient and detecting the light after attenuation of the tissue;
determining a signal quality of the signal;
determining which of the at least two different physiological measurements are capable of being measured based on the signal quality determination; and
activating only enough of the at least three different light emitters necessary to obtain the measurements capable of being measured.
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Abstract
Embodiments of the present disclosure include a handheld multi-parameter patient monitor capable of determining multiple physiological parameters from the output of a light sensitive detector capable of detecting light attenuated by body tissue. For example, in an embodiment, the monitor is capable of advantageously and accurately displaying one or more of pulse rate, plethysmograph data, perfusion quality, signal confidence, and values of blood constituents in body tissue, including for example, arterial carbon monoxide saturation (“HbCO”), methemoglobin saturation (“HbMet”), total hemoglobin (“Hbt”), arterial oxygen saturation (“SpO2”), fractional arterial oxygen saturation (“SpaO2”), or the like. The monitor can determine which a plurality of light emitting sources and which of a plurality of parameters to measure based on the signal quality and resources available.
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Citations
19 Claims
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1. A method of determining which of a plurality of physiological measurements to measure based on the signal quality of the signal, the method comprising:
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using a sensor configured to measure at least two different physiological measurements to obtain a signal from a light sensitive detector, the sensor including at least three different light emitters emitting at least three different wavelengths of light through tissue of a living patient and detecting the light after attenuation of the tissue; determining a signal quality of the signal; determining which of the at least two different physiological measurements are capable of being measured based on the signal quality determination; and activating only enough of the at least three different light emitters necessary to obtain the measurements capable of being measured. - View Dependent Claims (2, 3, 4)
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5. A method of informing a user of a patient monitor about one of a type of sensor communicating with the patient monitor and a type of physiological parameter determinable using the sensor communicating with the patient monitor, the method comprising:
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receiving information from an information element associated with one of an optical sensor and a communication cable between a patient monitor and an optical sensor; determining a number of wavelengths emitted by the optical sensor from the information; determining a signal quality of a signal received by the optical sensor; and activating an indicator of the type of physiological parameters determinable based on the number wavelengths emitted by the optical sensor and the signal quality of the signal. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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- 15. A physiological parameter monitor capable of improving performance by activating more light emission sources of an optical sensor, the monitor comprising a processor capable of determining a number of light emission sources available for activation on an attached sensor and capable of activating two of the plurality of light emission sources and capable of activating more than two of the plurality of light emission sources based on a signal quality received from the optical sensor.
Specification