System and method for a wearable vital signs monitor

An apparatus comprising:

• a polychromatic light source;
• a spectral sensor;
• one or more other sensors;
• a processor;
• and
• a non-transitory computer readable medium comprising instructions executable by the processor to:
• illuminate, via the polychromatic light source, a perfused tissue of a body of a patient;
• receive, via the spectral sensor, a polychromatic resultant signal from the body of the patient;
• determine a spectral property of the polychromatic resultant signal as measured by the spectral sensor, wherein the spectral property includes a light power measurement of polychromatic light;
• and
• determine a vital sign of the patient based, at least in part, on a lookup table and the spectral property of the polychromatic resultant signal, wherein the lookup table is indicative of a value of the vital sign;
• wherein the instructions are further executable by the processor to:
• determine a context for the polychromatic resultant signal based on input from the one or more other sensors, wherein the context is indicative of an area of the body of the patient illuminated by the polychromatic light source;
• and
• adjust at least one value of the lookup table based at least in part on the context determined for the polychromatic resultant signal based on the input from the one or more other sensors.

A method comprising:

• illuminating, via a wearable device, a perfused tissue of a body of a patient with a polychromatic light source;
• receiving, via a spectral sensor of the wearable device, a polychromatic resultant signal from the body of the patient;
• determining, via an on-board computer of the wearable device, a spectral property of the polychromatic resultant signal, wherein the spectral property includes a light power measurement of polychromatic light;
• determining, via the on-board computer of the wearable device, a vital sign of the patient based, at least in part, on a lookup table and the spectral property of the polychromatic resultant signal, wherein the lookup table is indicative of a value of the vital sign;
• determining a context for the polychromatic resultant signal based on input from one or more other sensors, wherein the context is indicative of an area of the body of the patient illuminated by the polychromatic light source;
• and
• adjusting at least one value of the lookup table based at least in part on the context determined for the polychromatic resultant signal based on the input from the one or more other sensors.