Wearable device measuring blood glucose levels based on glucose reflectivity

A method for detecting blood glucose on a user's wrist or other skin surface at a near infrared (NIR) light infiltration location such that arterial blood flow is detected at the wrist or other skin surface by the NIR light comprising:

• during an initialization phase, obtaining a baseline blood glucose data set correlated to a then-conventionally obtained blood glucose data:
• providing a user-wearable housing for a processor, a processor-coupled memory, a NIR transmitter and a NIR sensor, the NIR transmitter generating light in a predetermined narrow transmission band which narrow band is within a NIR sensory bandwidth of 1350-1800 nm;
• storing in memory the baseline blood glucose data set;
• in a post-initialization detection mode, placing the user-wearable housing and the NIR transmitter on the infiltration location of the user's wrist or other skin surface;
• in the detection mode, transmitting NIR light into the infiltration location;
• detecting, with the NIR sensor, reflected NIR light from arterial blood glucose representing a then-detected blood glucose signal;
• prior to initialization and detection, storing in memory storing a predetermined subcutaneous interference factor (SIF) contributory value for the NIR light narrow transmission band;
• correlating, with the processor, the detected blood glucose signal with the baseline blood glucose data set as modified by the SIF contributory value;
• and
• generating a displayable blood glucose level for the user based upon the correlated and signals as modified by the SIF contributory value.

A blood glucose detection system including a body-mountable blood glucose detector and a communicatively linked smart phone, the body-mountable detector adapted to be placed on a user's ear skin surface or nose skin surface at a near infrared (NIR) light infiltration location such that arterial blood flow is detected at the user's ear skin surface or nose skin surface by the NIR light, the smart phone having a memory storing therein an earlier obtained baseline blood glucose data set representing an earlier conventionally obtained blood glucose data, the blood glucose detection system comprising:

• the body-mountable detector including:
• an onboard unit mounted on or in one body-mountable structure from a group of body-mountable structures including an eyeglass temple coupled to one eyeglass, an eyeglass nose bridge coupled to another eyeglass, a clip-on earring body, a stud mounted earring body, and a stud mounted nose body, a respective body-mountable structure having a corresponding skin-side surface from the group of skin-side surfaces consisting of:
• for the eyeglass temple, a temple-ear skin-side surface;
• for the eyeglass nose bridge, a nose bridge skin-side surface;
• for the clip-on earring, a clip earring ear skin-side surface;
• for the stud mounted earring, a stud earring ear skin-side surface;
• and for the stud mounted nose body, a nose skin-side surface;
• a NIR transmitter and a NIR sensor encased in the onboard unit, the NIR transmitter and NIR sensor located on the corresponding skin-side surface of the respective body-mountable structure;
• the onboard unit having control processor, coupled to an onboard power supply to initiate NIR light transmission via the NIR transmitter and enable sensing of the return NIR light via the NIR sensor and enable wireless communications via a wireless communications port with the smart phone, the NIR transmitter generating NIR light in a predetermined narrow transmission band which narrow band is within a NIR sensory bandwidth of 1350-1800 nm;
• the NIR transmitter and NIR sensor, on the corresponding skin-side surface of the onboard unit's body-mountable structure, adapted to be disposed on the infiltration location of the user's ear skin surface or nose surface in a detection mode;
• and
• the NIR sensor detecting reflected light from arterial blood glucose representing a then-detected blood glucose signal;
• the control processor adapted to send the then-detected blood glucose signal to the communicatively coupled smart phone;
• the smart phone having a processor coupled to the memory, at least a user interface display and a communications module, the communications module enabling wireless communications with the onboard unit;
• the memory storing a predetermined subcutaneous interference factor (SIF) contributory value for the NIR light narrow transmission band;
• the processor correlating the then-detected blood glucose signal with the baseline blood glucose data set as modified by the SIF value and generating a displayable blood glucose level for the user;
• and
• the processor, during the detection mode, displaying a representative blood glucose level to the user enabling a user comparison with a healthcare recommended blood glucose level.