CA2536133A1 - A method of monitoring glucose level - Google Patents
A method of monitoring glucose level Download PDFInfo
- Publication number
- CA2536133A1 CA2536133A1 CA002536133A CA2536133A CA2536133A1 CA 2536133 A1 CA2536133 A1 CA 2536133A1 CA 002536133 A CA002536133 A CA 002536133A CA 2536133 A CA2536133 A CA 2536133A CA 2536133 A1 CA2536133 A1 CA 2536133A1
- Authority
- CA
- Canada
- Prior art keywords
- glucose level
- determining
- calculated
- glucose
- invasive method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 title claims abstract 65
- 239000008103 glucose Substances 0.000 title claims abstract 65
- 238000000034 method Methods 0.000 title claims abstract 24
- 238000012544 monitoring process Methods 0.000 title abstract 2
- 238000005259 measurement Methods 0.000 claims abstract 19
- 239000008280 blood Substances 0.000 claims abstract 17
- 210000004369 blood Anatomy 0.000 claims abstract 17
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims 1
- 238000005481 NMR spectroscopy Methods 0.000 claims 1
- 239000012491 analyte Substances 0.000 claims 1
- 230000036760 body temperature Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
- 230000010287 polarization Effects 0.000 claims 1
- 230000005855 radiation Effects 0.000 claims 1
- 230000005236 sound signal Effects 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 claims 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/41—Detecting, measuring or recording for evaluating the immune or lymphatic systems
- A61B5/414—Evaluating particular organs or parts of the immune or lymphatic systems
- A61B5/417—Evaluating particular organs or parts of the immune or lymphatic systems the bone marrow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/14—Devices for taking samples of blood ; Measuring characteristics of blood in vivo, e.g. gas concentration within the blood, pH-value of blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1468—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means
- A61B5/1477—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means non-invasive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/483—Physical analysis of biological material
- G01N33/487—Physical analysis of biological material of liquid biological material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
Abstract
The method of monitoring or measuring the concentration of glucose level in human and animal blood uses a non-invasive technique and includes measurements of the speed of sound through the blood, the conductivity of the blood, and the heat capacity of the blood, or by non-invasive measurement of any other parameters that can be used to calculate the glucose level. Thereafter, the glucose level for each of the three measurements is calculated and the final glucose value is determined by a weighted average of the three calculated glucose values.
Claims (19)
1. A non-invasive method of determining the glucose level of blood in a patient comprising the steps of:
a. non-invasively measuring the speed of sound through the blood of the patient;
b. non-invasively measuring the electrical conductivity of the blood of the patient;
c. non-invasively measuring the heat capacity of the blood of the patient;
d, calculating the corresponding glucose level for each of the measurements of the speed of sound, electrical conductivity of the blood and heat capacity of the blood;
e. comparing the three calculated glucose levels; and f. 1. if all three calculated glucose levels are similar within a predefined tolerance level, then calculating the final glucose level by determining a weighted average of the three calculated glucose levels; or
a. non-invasively measuring the speed of sound through the blood of the patient;
b. non-invasively measuring the electrical conductivity of the blood of the patient;
c. non-invasively measuring the heat capacity of the blood of the patient;
d, calculating the corresponding glucose level for each of the measurements of the speed of sound, electrical conductivity of the blood and heat capacity of the blood;
e. comparing the three calculated glucose levels; and f. 1. if all three calculated glucose levels are similar within a predefined tolerance level, then calculating the final glucose level by determining a weighted average of the three calculated glucose levels; or
2. if only two of the three calculated levels are similar within a predefined tolerance level, then calculating the final glucose level by determining a weighted average of only the two similar calculated glucose levels.
2. A non-invasive method of determining the glucose level according to Claim 1, further comprising the steps of:
g. repeating the measurement of one of the parameters of either speed, conductivity or heat capacity according to any one of the steps a-c herein;
h. calculating the corresponding glucose level for the measurement of the parameter in step g herein; and i. periodically repeating steps a-f herein to confirm the accuracy of the glucose calculation.
2. A non-invasive method of determining the glucose level according to Claim 1, further comprising the steps of:
g. repeating the measurement of one of the parameters of either speed, conductivity or heat capacity according to any one of the steps a-c herein;
h. calculating the corresponding glucose level for the measurement of the parameter in step g herein; and i. periodically repeating steps a-f herein to confirm the accuracy of the glucose calculation.
3. A non-invasive method of determining the glucose level according to Claim 1, wherein the speed of sound is determined by means of measurements of an ultra sound signal transmitted through the body.
4. A non-invasive method of determining the glucose level according to Claim 1, wherein the electrical conductivity of the blood is determined by means of electromagnetic inductance.
5. A non-invasive method of determining the glucose level according to Claim 1, wherein the heat capacity of the blood is determined by means of changing the temperature of a measured volume.
6. A non-invasive method of determining the glucose level of blood in a patient comprising the steps of:
a. non-invasively measuring three distinct parameters of the body from which glucose level can be calculated;
b. calculating the corresponding glucose level for each of the three measurements;
c. comparing the three calculated glucose levels; and d. 1. if all three calculated glucose levels are similar within a predefined tolerance level, then calculating the final glucose level by determining a weighted average of the three calculated glucose levels; or 2. if only two of the three calculated levels are similar within a predefined tolerance level, then calculating the final glucose level by determining a weighted average of only the two similar calculated glucose levels.
a. non-invasively measuring three distinct parameters of the body from which glucose level can be calculated;
b. calculating the corresponding glucose level for each of the three measurements;
c. comparing the three calculated glucose levels; and d. 1. if all three calculated glucose levels are similar within a predefined tolerance level, then calculating the final glucose level by determining a weighted average of the three calculated glucose levels; or 2. if only two of the three calculated levels are similar within a predefined tolerance level, then calculating the final glucose level by determining a weighted average of only the two similar calculated glucose levels.
7. A non-invasive method of determining the glucose level according to Claim 6, further comprising the steps of:
e. repeating the measurement of one of the parameters;
f. calculating the corresponding glucose level for the measurement of the parameter in step a herein; and g. periodically repeating steps a -d herein to confirm the accuracy of the glucose calculation.
e. repeating the measurement of one of the parameters;
f. calculating the corresponding glucose level for the measurement of the parameter in step a herein; and g. periodically repeating steps a -d herein to confirm the accuracy of the glucose calculation.
8. A non-invasive method of determining glucose level according to Claim 6, wherein the three distinct parameters of the body from which glucose level can be calculated are selected from the group consisting of speed of sound though the body, conductivity, heat capacity of the blood, acoustic impedance, electrical/magnetic coefficient, thermal conductivity, elasticity, blood density, specific gravity, polarization coefficient, optical scattering, nuclear magnetic resonance , analyte, blood temperature, body temperature, the effects of thermal waves, the infrared radiation naturally emitted from the body, responses by the tissue to a stimulus, electrical properties, electromotive force and electric current.
9. A non-invasive method of determining glucose level according to Claim 1, wherein the weight for each calculated glucose level is based on the reliability of the measurement of the corresponding parameter.
10. A non-invasive method of determining glucose level according to Claim 6, wherein the weight for each calculated glucose level is based on the reliability of the measurement of the corresponding parameter.
11. A non-invasive method of determining glucose level according to Claim 2, wherein steps a-f are repeated after a predetermined amount of time.
12. A non-invasive method of determining glucose level according to Claim 2, wherein steps a-f are repeated after a predetermined number of measurements.
13. A non-invasive method of determining glucose level according to Claim 7, wherein steps a-d are repeated after a predetermined amount of time.
14. A non-invasive method of determining glucose level according to Claim 7, wherein steps a-d are repeated after a predetermined number of measurements.
15. A non-invasive method of determining glucose level according to Claim 1, wherein, if one of the calculated glucose levels is not within the predefined tolerance level, then checking the remaining two calculated glucose levels to confirm they are within a tighter tolerance range and then calculating the final glucose level by determining the weighted average of only the two similar calculated glucose levels.
16. A non-invasive method of determining glucose level according to Claim 6, wherein, if one of the calculated glucose levels is not within the predefined tolerance level, then checking the remaining two calculated glucose levels to confirm they are within a tighter tolerance range and then calculating the final glucose level by determining the weighted average of only the two similar calculated glucose levels.
17. A non-invasive method of determining glucose level according to Claim 1, consisting of the additional steps of: incrementing a counter each time one of the calculated glucose levels is not with the tolerance level; and recalibrating measurement procedure when the counter indicates a predetermined number of times the calculated glucose level was not within the tolerance level.
18. A non-invasive method of determining glucose level according to Claim 6, consisting of the additional steps of: incrementing a counter each time one of the calculated glucose levels is not with the tolerance level; and recalibrating measurement procedure when the counter indicates a predetermined number of times the calculated glucose level was not within the tolerance level.
19. A non-invasive method of determining the glucose level of blood in a patient comprising the steps of:
a. non-invasively measuring three distinct parameters of the body from which glucose level can be calculated;
b. calculating the corresponding glucose level for each of the three measurements;
c. calculating a glucose level by determining a weighted average of the three calculated glucose levels d. repeating the measurement of one of the parameters;
e. calculating the corresponding glucose level for the measurement of the parameter in step d herein; and f. periodically repeating steps a -c herein to confirm the accuracy of the glucose calculation.
a. non-invasively measuring three distinct parameters of the body from which glucose level can be calculated;
b. calculating the corresponding glucose level for each of the three measurements;
c. calculating a glucose level by determining a weighted average of the three calculated glucose levels d. repeating the measurement of one of the parameters;
e. calculating the corresponding glucose level for the measurement of the parameter in step d herein; and f. periodically repeating steps a -c herein to confirm the accuracy of the glucose calculation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/643,804 US6954662B2 (en) | 2003-08-19 | 2003-08-19 | Method of monitoring glucose level |
| US10/643,804 | 2003-08-19 | ||
| PCT/IB2004/003509 WO2005017642A2 (en) | 2003-08-19 | 2004-08-09 | A method of monitoring glucose level |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2536133A1 true CA2536133A1 (en) | 2005-02-24 |
| CA2536133C CA2536133C (en) | 2010-12-14 |
Family
ID=34193961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2536133A Expired - Fee Related CA2536133C (en) | 2003-08-19 | 2004-08-09 | A method of monitoring glucose level |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US6954662B2 (en) |
| EP (1) | EP1656065B1 (en) |
| JP (1) | JP4538691B2 (en) |
| KR (1) | KR100926155B1 (en) |
| CN (1) | CN100546535C (en) |
| AT (1) | ATE515230T1 (en) |
| AU (1) | AU2004264570B2 (en) |
| BR (1) | BRPI0413762B8 (en) |
| CA (1) | CA2536133C (en) |
| ES (1) | ES2367023T3 (en) |
| IL (1) | IL173695A (en) |
| MX (1) | MXPA06001917A (en) |
| RU (1) | RU2376927C2 (en) |
| TR (1) | TR200600651T2 (en) |
| WO (1) | WO2005017642A2 (en) |
| ZA (1) | ZA200600989B (en) |
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