Project Nightlight: Efficacy and System Acceptance of Dinner/Night vs. 24hr Closed Loop Control

Project Nightlight: Efficacy and System Acceptance of Dinner/Night vs. 24hr Closed Loop Control

The purpose of this study is to use an investigational type of technology called Closed-Loop Control (CLC) Medical Platform System to help control blood sugar in people with type 1 diabetes mellitus in a home setting.

The CLC is an "artificial pancreas" (AP) application that uses advanced closed loop control algorithms to automatically manage blood glucose levels for people with Type 1 Diabetes. The system modulates insulin to keep blood glucose in a targeted range. The CLC will be deployed with different functionalities at different stages of the trial, resulting in variation in what the subject will be responsible for and what the system will drive.These functionalities occur in a randomized cross-over design, each occurring for 8 weeks. These modalities are:

1. SAP=sensor-augmented pump only
2. USS+SAP (d)= Evening and Overnight Closed-Loop Control=SAP during day and CLC starting at dinner and continuing overnight
3. USS+CLC (d)= 24/7 Closed-Loop Control=24-hour Day and Night Closed Loop Control

Inclusion Criteria:

• type 1 diabetes for at least one year
• using insulin for at least 1 year
• an insulin pump for at least 6 months
• willingness to switch to lispro (Humalog) or aspart (Novolog) if using glulisine (Apidra).

Exclusion Criteria:

• a medical condition or being been treated with medications that might interfere with the study