Try our beta test site

Blood/Interstitial Glucose Measurements and Cognitive Function During Hypoglycemia and Recovery

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 September 2014 by Joslin Diabetes Center.
Recruitment status was:  Recruiting
Abbott Diabetes Care
Information provided by (Responsible Party):
Howard Wolpert, Joslin Diabetes Center Identifier:
First received: January 24, 2011
Last updated: September 20, 2014
Last verified: September 2014
The purpose of this study is to find out the effects of hypoglycemia on cognition in healthy individuals and how well changes in (interstitial) tissue glucose levels correlate with changes in cognitive function as compared to blood glucose levels.

Condition Intervention
Procedure: euglycemic and hypoglycemic clamp

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
Official Title: Blood/Interstitial Glucose Measurements and Cognitive Function During Hypoglycemia and Recovery

Resource links provided by NLM:

Further study details as provided by Joslin Diabetes Center:

Primary Outcome Measures:
  • cognitive function correlation to blood or interstitial glucose [ Time Frame: 1 year ]
    This investigator initiated study will evaluate cognitive function at the onset, during and following recovery from hypoglycemia and will determine if cognitive function correlates better with blood or interstitial glucose concentrations.

Estimated Enrollment: 30
Study Start Date: January 2011
Estimated Study Completion Date: October 2015
Estimated Primary Completion Date: October 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Clamp
Subjects will complete clamp study visit.
Procedure: euglycemic and hypoglycemic clamp
Subjects will undergo standard euglycemic and hypoglycemic clamps, and will have concurrent assessments of cognitive function and measurement of interstitial glucose concentrations.

Detailed Description:
Subjects will undergo hypoglycemic clamps during which interstitial glucose will be measured and cognitive function will be assessed.

Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • non obese (BMI <30), ages 18-50

Exclusion Criteria:

  • renal or hepatic failure
  • cancer or lymphoma
  • malabsorption or malnourishment
  • hypercortisolism
  • alcoholism or drug abuse
  • anemia
  • eating disorder or depression
  • coronary artery disease
  • Arrhythmias
  • hypertension
  • on medications known to affect the blood glucose to be measured such as
  • glucocorticoids
  • on blood thinning agents

    • Pregnant women, breastfeeding women and women who want to become pregnant in the next 6 months will be excluded from the study.
    • Subjects who have donated blood two weeks prior to the study.
    • Allergies to pig derived products (Heparin will be used)
  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: NCT01283126

United States, Massachusetts
Joslin Diabetes Center
Boston, Massachusetts, United States, 02215
Sponsors and Collaborators
Joslin Diabetes Center
Abbott Diabetes Care
Principal Investigator: Howard Wolpert, MD Joslin Diabetes Center
Study Chair: Greeshma K Shetty, MD Joslin Diabetes Center
Study Chair: Gail Musen, PhD Joslin Diabetes Center
Study Chair: Gail Adler, MD, PhD Brigham and Women's Hospital
  More Information

Responsible Party: Howard Wolpert, Senior Physician, Joslin Diabetes Center; Director, Insulin Pump & Continuous Glucose Monitoring Programs, Joslin Diabetes Center; Assistant Professor, Harvard Medical School, Joslin Diabetes Center Identifier: NCT01283126     History of Changes
Other Study ID Numbers: CHS #: 2010-09 
Study First Received: January 24, 2011
Last Updated: September 20, 2014

Keywords provided by Joslin Diabetes Center:
Hypoglycemia, cognitive function

Additional relevant MeSH terms:
Glucose Metabolism Disorders
Metabolic Diseases
Hypoglycemic Agents
Physiological Effects of Drugs processed this record on February 20, 2017