System and method for health monitoring including a user device and biosensor
First Claim
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1. A biosensor unit, comprising:
- a wireless transceiver configured to communicate to a mobile device using a short range wireless interface;
a temperature sensor configured to obtain a temperature of a user;
a blood pressure sensor configured to detect blood pressure;
a photoplethysmography (PPG) circuit including a light source configured to emit light at a plurality of wavelengths directed at skin tissue and a detector that detects a plurality of spectral responses around the plurality of wavelengths of light; and
a processing circuit configured to;
process the plurality of spectral responses; and
obtain biosensor data using the plurality of spectral responses, wherein the biosensor data includes an oxygen saturation level, a heart rate, and a level of vasodilation, wherein the level of vasodilation includes a measurement of a change in a width of a vessel dilation due to vasodilators; and
wherein the processing circuit is configured to determine the level of vasodilation by;
determining a change in intensity from one or more spectral responses of the plurality of spectral responses due to the change in the width of the vessel in response to muscle relaxation of the vessel during vasodilation; and
mapping the determined change in intensity to a measurement of the width of the vessel during vasodilation, wherein the one or more spectral responses are around one or more of;
ultraviolet (UV) light or infrared (IR) light.
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Abstract
A biosensor unit is coupled to a user device and may communicate with the user device over a short range wireless or wired interface. The biosensor unit includes an optical sensor used to obtain an oxygen saturation level, a heart rate and a respiration rate of a user. The biosensor unit may also obtain a blood pressure and a temperature of the user using one or more other sensors. The biosensor unit transmits the obtained biosensor data to the user device using the short range interface.
27 Citations
20 Claims
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1. A biosensor unit, comprising:
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a wireless transceiver configured to communicate to a mobile device using a short range wireless interface; a temperature sensor configured to obtain a temperature of a user; a blood pressure sensor configured to detect blood pressure; a photoplethysmography (PPG) circuit including a light source configured to emit light at a plurality of wavelengths directed at skin tissue and a detector that detects a plurality of spectral responses around the plurality of wavelengths of light; and a processing circuit configured to; process the plurality of spectral responses; and obtain biosensor data using the plurality of spectral responses, wherein the biosensor data includes an oxygen saturation level, a heart rate, and a level of vasodilation, wherein the level of vasodilation includes a measurement of a change in a width of a vessel dilation due to vasodilators; and wherein the processing circuit is configured to determine the level of vasodilation by; determining a change in intensity from one or more spectral responses of the plurality of spectral responses due to the change in the width of the vessel in response to muscle relaxation of the vessel during vasodilation; and mapping the determined change in intensity to a measurement of the width of the vessel during vasodilation, wherein the one or more spectral responses are around one or more of;
ultraviolet (UV) light or infrared (IR) light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A biosensor unit, comprising:
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a transceiver configured to communicate to a mobile device; a PPG circuit including a light source circuit configured to emit light at a plurality of wavelengths directed at skin and a detector circuit configured to detect a plurality of spectral responses around the plurality of wavelengths of light; and a processing circuit configured to; process the plurality of spectral responses around the plurality of wavelengths; obtain biosensor data using the plurality of spectral responses, wherein the biosensor data includes a concentration level of at least one substance in blood flow and a level of vasodilation, wherein the level of vasodilation includes a measurement of a localized change in width of a vessel during vasodilation; and wherein the processing circuit is further configured to obtain the level of vasodilation by; determining an increase in intensity from one or more spectral responses of the plurality of spectral responses due to increased blood flow through dilated arteries; and mapping the increase in intensity to the localized change in the width of the vessel during vasodilation, wherein the one or more spectral responses are around one or more of;
ultraviolet (UV) light or infrared (IR) light. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A device, comprising:
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user equipment (UE) including; a display; a UE processing circuit; and a device transceiver configured to communicate over a cellular network and to communicate over a short range interface; at least one external biosensor, comprising; a blood pressure sensor configured to detect blood pressure; a biosensor transceiver configured to communicate with the device transceiver using the short range interface; a PPG circuit including a light source configured to emit light at a plurality of wavelengths directed at skin tissue and a detector circuit configured to detect a first spectral response around a first predetermined wavelength of light from the skin tissue and a second spectral response around a second predetermined wavelength of light from the skin tissue; a biosensor processing circuit configured to; obtain biosensor data using the plurality of spectral responses, wherein the biosensor data includes an oxygen saturation level, a heart rate, and a level of vessel dilation, wherein the level of vessel dilation is due to a muscle relaxation in a vessel caused by vasodilators during vasodilation; generate a message including the biosensor data for transmission to the user equipment over the short range wireless interface; and wherein the biosensor processing circuit is further configured to determine a level of vessel dilation by; determining a change in intensity from one or more spectral responses of the plurality of spectral responses during the vessel dilation; and mapping the change in intensity to a change in a width of the vessel, wherein the one or more spectral responses are around one or more of;
ultraviolet (UV) light or infrared (IR) light. - View Dependent Claims (19, 20)
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Specification