Noninvasive multi-parameter patient monitor

摘要

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.

主权项

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; driving less than said at least 3 different light emitters to emit light, said driving responsive to the signal quality determination; and determining an output value for one of the at least two different measurements responsive to said emitted light.