Health monitoring systems and methods
Systems, methods and devices for reducing noise in health monitoring including monitoring systems, methods and/or devices receiving a health signal and/or having at least one electrode and/or sensor for health monitoring.
1. A device for health monitoring the device being configured to be adhered to the skin of a subject; the device comprising:
one or more light sources configured to emit light wavelengths of red, InfraRed (IR), green, or a weighted combination of light wavelengths;
one or more light sensors configured to sense light wavelengths of red, InfraRed (IR), green, or a weighted combination of light wavelengths;
a barrier wall disposed in operative disposition separating the one or more light sources from the one or more light sensors;
the barrier wall being opaque and diffuse reflective, the barrier wall barring light from passing through the barrier wall wholly within the device directly from the one or more light sources to the one or more light sensors;
a light transmissive material having the light sources and at least one of the one or more light sensors and the barrier wall disposed therewithin;
the light transmissive material encapsulating both the one or more light sources and the one or more sensors, encapsulating by having substantially no air gaps between the light transmissive material encapsulating the one or more light sources and the one or more sensors, for:
increased efficiency in light emission to the skin and to capture otherwise lost photons; and,
an adhesive being adhered to the surface of the light transmissive material for adhering to the skin; the adhesive having a similar refractive index to the transmissive material.
2. A device for health monitoring according to claim 1 further including that the light transmissive material is a light pipe that encapsulates both: the one or more light sources and the one or more sensors.
3. A device according to claim 1 ; the one or more light sources being one or more LEDs; or the one or more light sensors being one or more photodiodes.
4. A device according to claim 1 further including an external barrier wall that is diffuse reflective.
5. A device according to claim 4 the external barrier wall configured for directing light to the skin.
6. A device according to claim 4 further comprising one or more of:
emitting light to the skin of the user by one or both of direct emission or reflection; and, collecting light by one or both of direct collection or reflection;
wherein the reflection being off the barrier wall or the external barrier wall.
7. A device according to claim 1 configured for determining oxygenation.
8. A device according to claim 7 further comprising:
emitting light from the one or more light sources;
barring the emitting light from crossing through the barrier wall; and
the one or more light sensors for receiving reflected light from the light emitted from the light sources.
9. A device according to claim 8 further comprising:
passing the light emitted from the one or more light sources into the skin of a subject;
the one or more light sensors for receiving reflected light from the subject; and,
determining oxygenation from the reflected light.
10. A device according to claim 1 , comprising one or more of:
the transmissive material being epoxy;
the transmissive material having a substantially flat surface; and/or
little or no air gap being presented between the transmissive material and one or more of the skin, the one or more light sources and the one or more light sensors.
11. A device according to claim 1 ,
the one or more light sensors being centrally disposed relative one or more light sources to sense reflected light emitted from the light sources; and
the one or more light sources being peripherally disposed relative to the light sensors.
12. A device according to claim 11 comprising one or more of:
two light sensors are disposed centrally relative to two or more light sources;
four light sensors are disposed centrally relative to two or more light sources; and,
four light sensors are disposed centrally relative to four or more light sources.
13. A device according to claim 12 comprising one or more of:
the two light sensors being photodiodes that are disposed centrally relative to the two or more light sources which are LEDs;
the four light sensors being photodiodes that are disposed centrally relative to the two or more light sources which are LEDs; and,
the four light sensors being photodiodes that are disposed centrally relative to the four or more light sources which are LEDs.
14. A device according to claim 1 , the device comprising one or both:
a substrate; and
a conductive sensor connected to the substrate.
15. A device according to claim 1 the one or more light sensors and one or more light sources providing for a focused or controlled interrogation of a capillary bed in order to reduce local motion artifact effects.
16. A device according to claim 1 ; the device comprising:
the one or more light sensors being one or more pulse oximetry sensors, and, the one or more light sources being peripherally disposed relative to the one or more light sensors.
17. A device according to claim 16 the one or more pulse oximetry sensors and/or light sources providing for interrogation of a wider area of capillary bed in order to reduce local motion artifact effects.
18. A device according to claim 1 ; the device comprising:
circuitry for reducing errors caused by ambient light using a correlated double sampling technique; comprising:
first and second switches and;
first and second capacitors,
the first capacitor being in series with the light sensor, and the second capacitor is in parallel with the output, and the first and second switches being disposed between the output and ground to alternatively provide output or shunt to ground.
19. A device according to claim 18 ; the device comprising:
a substrate; and
a conductive sensor connected to the substrate.