Non-invasive methods of detecting analyte concentrations using hyperosmotic fluids

• US 20040242977A1
• Filed: 05/17/2004
• Published: 12/02/2004
• Est. Priority Date: 06/02/2003
• Status: Abandoned Application

• Current Assignee: Andrew J. Dosmann
• Original Assignee: Andrew J. Dosmann
• Inventors: Dosmann, Andrew J.
• Application Number:
  US10/846,778
• Publication Number:
  US 20040242977A1
• Time in Patent Office: Days
• US Class Current: 600/315
• CPC Class Codes: A61B 2562/146 for optical coupling
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters

Abstract

A non-invasive method of determining the concentration of an analyte comprises topographically applying a hyperosmotic solution to an area of the skin. The hyperosmotic solution is adapted to at least partially absorb into the area of the skin such that the skin becomes generally transparent. An optical readhead is placed over the generally transparent area of the skin. The amount of light of the analyte is measured using at least one wavelength via the optical readhead. The concentration of the analyte is calculated from the amount of light. The analyte may be glucose and the hyperosmotic solution may be glycerol.

Claims

1. A non-invasive method of determining the concentration of an analyte comprising:

topographically applying a hyperosmotic solution to an area of the skin, the hyperosmotic solution being adapted to at least partially absorb into the area of the skin such that the skin becomes generally transparent;

placing an optical readhead over the generally transparent area of the skin;

measuring the amount of light of the analyte using at least one wavelength via the optical readhead; and

calculating the concentration of the analyte from the amount of light.

2. The method of claim 1, wherein the analyte is glucose.

3. The method of claim 1, wherein the analyte is cholesterol, albumin, or fructose.

4. The method of claim 1, wherein the at least one selected wavelength is at a mid-infrared wavelength.

5. The method of claim 1, wherein the at least one selected wavelength is at a near-infrared wavelength.

6. The method of claim 1, wherein measuring of the amount of reflected light of the analyte occurs at a plurality of selected wavelengths.

7. The method of claim 1, wherein the measured amount of light is transmitted light.

8. The method of claim 1, wherein the measured amount of light is reflected light.

9. The method of claim 1, wherein the hyperosmotic solution is glycerol.

10. The method of claim 1 further comprising washing the area of the skin with water to substantially remove the hyperosmotic solution and to hydrate the area of skin.

11. The method of claim 1, wherein the skin is human.

12. A non-invasive method of determining the concentration of glucose comprising:

topographically applying a hyperosmotic solution to an area of the skin, the hyperosmotic solution being adapted to at least partially absorb into the area of the skin such that the skin becomes generally transparent;

placing an optical readhead over the generally transparent area of the skin;

measuring the amount of light of the glucose using at least one wavelength via the optical readhead; and

calculating the concentration of glucose from the amount of light.

13. The method of claim 12, wherein the hyperosmotic solution is glycerol.

14. The method of claim 12, wherein the at least one selected wavelength is at a mid-infrared wavelength.

15. The method of claim 12, wherein the at least one selected wavelength is at a near-infrared wavelength.

16. The method of claim 12, wherein measuring of the amount of light of the analyte occurs at a plurality of selected wavelengths.

17. The method of claim 12, wherein the measured amount of light is reflected light.

18. The method of claim 12, wherein the measured amount of light is transmitted light.

19. The method of claim 12 further comprising washing the area of the skin with water to substantially remove the hyperosmotic solution and to hydrate the area of skin.

20. The method of claim 12, wherein the skin is human skin.

21. A non-invasive method of determining the concentration of glucose comprising:

topographically applying glycerol to an area of the skin such that the skin becomes generally transparent;

placing an optical readhead over the generally transparent area of the skin;

measuring the amount of light of the glucose at a mid-infrared wavelength, a near-infrared wavelength or combination thereof via the optical readhead; and

calculating the concentration of the glucose from the amount of light.

22. The method of claim 21, wherein measuring of the amount of light of the analyte occurs at a plurality of selected wavelengths.

23. The method of claim 21, wherein the measured amount of light is reflected light.

24. The method of claim 21, wherein the measured amount of light is transmitted light.

25. The method of claim 21, wherein the skin is human skin.

26. A non-invasive method used in calculating the concentration of an analyte comprising:

topographically applying a hyperosmotic solution to an area of the skin, the hyperosmotic solution being adapted to at least partially absorb into the area of the skin such that the skin becomes generally transparent;

placing an optical readhead over the generally transparent area of the skin; and

measuring the amount of light of the analyte using at least one wavelength via the optical readhead.

27. The method of claim 26, wherein the hyperosmotic solution is glycerol and the analyte is glucose.