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Comparison of Noninvasive Blood Glucose Concentrations Relative to Finger Capillary Blood Glucose References

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified February 2012 by InLight Solutions.
Recruitment status was:  Active, not recruiting
Information provided by (Responsible Party):
InLight Solutions Identifier:
First received: August 9, 2011
Last updated: February 23, 2012
Last verified: February 2012
The purpose of the study is to prospectively evaluate a noninvasive, near-infrared based method for measuring glucose concentration relative to invasive blood reference measurements. The initial phase of the study will be focused on procurement of the data needed to develop a robust, accurate calibration. The second phase will be focused on performance evaluation of the system.

Type 1 Diabetes
Type 2 Diabetes
Gestational Diabetes

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: An Evaluation and Comparison of Noninvasive Blood Glucose Concentrations Relative to Finger Capillary Blood Glucose References

Resource links provided by NLM:

Further study details as provided by InLight Solutions:

Primary Outcome Measures:
  • Calibrate near-infrared spectroscopy-based glucose meter [ Time Frame: 1 year ]
    The collection of capillary blood glucose and noninvasive data will allow the calibration of the noninvasive systems and subsequently evaluate performance via a validation study. The paired NIR spectrum and blood reference data acquired during calibration will be processed using multivariate regression techniques to create a calibration model. Results will be compared using a Clark error grid.

Secondary Outcome Measures:
  • Compare Noninvasive to invasive techniques [ Time Frame: 1 year ]
    Comparison of noninvasive glucose measurement performance versus standard invasive reference. Invasive measurements are made by obtaining capillary blood glucose measurements and then measuring blood on a Yellow Springs Instrument (YSI). Due to the fact that instrumentation drift and subject physiological changes can adversely influence measurement performance, the study is specifically designed to examine performance over an appropriate period of time with a reasonable distribution of subject variance. Results will be compared using a Clark error grid.

Biospecimen Retention:   None Retained
capillary glucose measurements

Estimated Enrollment: 100
Study Start Date: June 2011
Estimated Study Completion Date: February 2012
Estimated Primary Completion Date: February 2012 (Final data collection date for primary outcome measure)
Type 2 Diabetes
Those previously diagnosed with type 2 diabetes
Type 1 Diabetes
Those previously diagnosed with type 1 diabetes
Gestational Diabetes
Those that are currently diagnosed with gestational diabetes
Healthy Human Volunteers
Those that have not been diagnosed with any type of diabetes

Detailed Description:

Currently, individuals with diabetes must use an invasive finger stick methodology for the determination of their blood glucose levels. Although current technology glucose meters use a smaller amount of blood than older generation meters, the pain and inconvenience associated with this invasive measurement is the number one reason cited for inadequate or infrequent blood glucose monitoring. In fact up to 67% of patients with diabetes fail to routinely monitor their blood glucose levels. A survey of 1895 patients showed that finger soreness was the most common reason given for self-reported noncompliance with testing recommendations, followed by pain, inconvenience, fear of needles, and "other" (including cost), (Diabetes Care August 2001 vol. 24 no. 8 1502-1503). The ability to make a painless blood glucose measurement using only light would address the pain and inconvenience issues associated with current technology glucose meters.

The initial application of the technology is associated with the monitoring of Gestational Diabetes. The International Association of Diabetes and Pregnancy Study Groups (IADPSG) recently released recommendations for diagnosing gestational diabetes, as well as clarifying the benefits of treatment (Diabetes Care, 2010;33:676-682). The IADPSG cited research that found significant graded relationships between increasing maternal glucose levels and the frequency of four primary and five secondary outcomes. For example, with a 1-standard deviation increase in maternal fasting, 1-hour, and 2-hour plasma glucose levels, there was a corresponding 38%, 46%, and 38% increased risk, respectively, in the primary outcome of birth weight >90th percentile, and a 5%, 18%, and 16% increased risk, respectively, of the secondary outcome of premature delivery before 37 weeks gestation (N Engl J Med 2008;358:1991-2002).


Ages Eligible for Study:   20 Years to 50 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
The Human Subject population consists of female subjects between the ages of 20 and 50. Subjects must have been diagnosed with either Type I, Type II, or Gestational diabetes and may utilize healthy individuals for the validation phase. Up to 100 subjects may be recruited to participate in this study. Subjects will be recruited from the community and will be selected to ensure a representative sample of the projected intended use population. Efforts will also be made to ensure a broad and even distribution of ages (between 20 and 50 years old) and ethnicities.

Inclusion Criteria:

  • Female at least 20 years of age but not older than 50 years of age
  • Female with Type I or Gestational diabetes based on ADA criteria
  • Female with Type II diabetes and A1c of greater than 7.0 as measured on a Bayer A1C Now meter
  • May include female healthy volunteers.

Exclusion Criteria:

  • Subject requires hemo-dialysis
  • Severe heart disease as evidenced by peripheral edema
  • Liver disease as evidenced by jaundice
  • Active alcohol or drug abuse
  • Body Mass Index (BMI) > 35 kg/m2
  • Hand size too large to fit in the optical measurement instrumentation
  • Middle finger width of less than 5 mm
  • Skin damage at optical sampling site on hand
  • Currently taking prednisone or other systemic steroids
  • Tattoo at the optical sampling site
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01415544

United States, New Mexico
Lovelace Scientific Resources
Albuquerque, New Mexico, United States, 87106
Sponsors and Collaborators
InLight Solutions
Principal Investigator: Walter Forman, MD Lovelace Scientific Resources
  More Information

Responsible Party: InLight Solutions Identifier: NCT01415544     History of Changes
Other Study ID Numbers: 10-0020
Study First Received: August 9, 2011
Last Updated: February 23, 2012

Keywords provided by InLight Solutions:

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes, Gestational
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Pregnancy Complications processed this record on March 30, 2017