Controlled Insulin Delivery: Combining Technology With Treatment
1 other identifier
interventional
19
2 countries
2
Brief Summary
Hypothesis: Closed-loop control systems for an artificial pancreas using multi-parametric model predictive control can be developed and evaluated safely in patients with Type 1 Diabetes Mellitus (T1DM) to control blood glucose concentrations. This study seeks to combine real-time continuous glucose sensing with automated insulin delivery in a closed-loop system that will achieve euglycemia in patients with T1DM. The end result of this line of research will be an artificial pancreas that will provide around-the-clock glucose regulation through controlled insulin delivery in response to detected patterns of change in glucose levels.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for early_phase_1
Started Jul 2008
2 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
July 1, 2008
CompletedPrimary Completion
Last participant's last visit for primary outcome
January 1, 2010
CompletedStudy Completion
Last participant's last visit for all outcomes
January 1, 2010
CompletedFirst Submitted
Initial submission to the registry
November 15, 2011
CompletedFirst Posted
Study publicly available on registry
December 2, 2011
CompletedMarch 23, 2021
March 1, 2021
1.5 years
November 15, 2011
March 18, 2021
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Restoration of Euglycemia
The primary endpoint of this pilot study is successful restoration of euglycemia from the two perturbed conditions using closed loop control with minimal hypo- and hyperglycemia exposure. The first condition involves restoration of euglycemia when the subject is in a hyperglycemic state. The second condition involves restoration of euglycemia following consumption of a meal containing 25g CHO with no insulin bolus. The patients will be followed for the duration of the 12 hour study.
12 hours
Secondary Outcomes (1)
Average percent-of-time-in-range (80 - 180 mg/dL)
12 hours
Study Arms (1)
Closed-loop control system
EXPERIMENTALThe objective of this study is to automate glucose control in subjects with type 1 diabetes using a computer control algorithm in a controlled in-clinic research setting. The controller will be evaluated under two conditions: 1. restoring euglycemia (80-140 mg/dL) when the controller is initiated during a period when the subject's glucose is above the euglycemic range; 2. restoring euglycemia (80-140 mg/dL) when the controller is challenged with a small unannounced meal (\~25 g CHO).
Interventions
Subjects will arrive fasting at 7am unless needed for hypoglycemia (glucose \< 70 mg/dL) and no extra bolus insulin after 3am. An IV catheter will be inserted for blood samples and for IV administration of glucose if necessary. Blood samples will be analyzed for glucose by YSI 2300Stat every 30 minutes. Breakfast consisting of 25g of CHO will be eaten at 7:30 am and the subject will bolus for this amount of CHO. The controller is switched "on" on the down slope of the meal response, and the subject is brought to a basal steady-state by the controller. Target blood glucose is 110 ± 30-mg/dL. After approximately 3 hours a small lunch will be eaten consisting of 25g of CHO (unannounced meal challenge). The subject will be monitored until blood glucose returns to euglycemia.
Eligibility Criteria
You may qualify if:
- Willing to sign the consent form
- Type 1 diabetes for at least 1 year prior to the study
- Using continuous subcutaneous insulin infusion pump
- Above 21 years of age
- Willing to follow the study requirements
You may not qualify if:
- Allergy to the sensor or to one of its components
- Psychiatric disorders
- Reported diabetic ketoacidosis within last 3 months
- Abnormal liver function (Transaminase \> 2 times the upper limit of normal)
- Heart failure
- Any carcinogenic disease
- Any other chronic abnormality
- Unwilling to perform or to follow the research protocol
- Participation in any other study concurrent with the proposed study
- Creatinine concentration above the upper limit of normal for age and sex
- Active coronary artery disease
- Active gastroparesis
- History of uncontrolled seizures
- Pregnancy
- Untreated adrenal insufficiency
- +3 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (2)
Sansum Diabetes Research Institute
Santa Barbara, California, 93105, United States
Schneider Children's Medical Center of Israel
Petah Tikva, Israel
Related Publications (50)
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MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Lois Jovanovic, M.D.
Sansum Diabetes Research Institute
Study Design
- Study Type
- interventional
- Phase
- early phase 1
- Allocation
- NA
- Masking
- NONE
- Purpose
- TREATMENT
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
November 15, 2011
First Posted
December 2, 2011
Study Start
July 1, 2008
Primary Completion
January 1, 2010
Study Completion
January 1, 2010
Last Updated
March 23, 2021
Record last verified: 2021-03