| 摘要 |
A method and apparatus for measuring a blood analyte concentration using an inexpensive, low precision sensor device is provided. One embodiment of the method includes obtaining energy absorption measurement data through a body part of an individual. A plurality of indicator variables are subsequently calculated from the energy absorption measurement data. An indicator variable from the plurality of indicator variables having the highest correlation to blood glucose level is determined, and a first optical term based on the indicator variable with the highest correlation to blood glucose level is allocated to form a regression analysis equation. An estimated value of the blood analyte concentration using the regression analysis equation is calculated. The inexpensive, non-invasive measurement instrument includes a first light source that introduces near-infrared energy into blood present in a body part of an individual, and a second light source that introduces red light energy into the blood present in the body part. A detector detects the energy emerging from the body part, and produces an electrical signal indicative of the energy emerging from the body part. A processor calculates a plurality of indicator variables from the electrical signal, determines which indicator variable from the plurality of indicator variables has the highest correlation to blood glucose level, and calculates an estimated value of the blood analyte concentration based on the indicator variable having the highest correlation to blood glucose level. The blood analyte concentration is calculated using a regression analysis equation.
|
