Study design: Multicenter,randomized, prospective, open label, cross over, six segments, pilot trial to evaluate blood glucose control overnight under closed-loop insulin delivery with MD-Logic Artificial Pancreas (MDLAP) system in patients with type 1 diabetes.

on the first segment 15 eligible subjects will be enrolled from the three participating centers (5 patients at each center). All 15 patients will participate in the overnight closed loop session in the hospital settings.

On the second segment, 54 eligible subjects will be enrolled (18 at each center). Each subject will participate in the two consecutive overnight sessions in diabetes camp settings, one under closed-loop with MDLAP and one under sensor augmented pump therapy.

In the third segment,9-20 eligible patients will be enrolled at the Israeli center only.Each subject will participate in up to four consecutive overnight under closed loop with MDLAP and up to four additional overnight under regular sensor augmented pump therapy at home.

On the fourth segment, 45-60 patients will be enrolled at the Israeli center only. This segment will be conducted at a diabetes camp and will consist of two main parts. In part 1, 15-20 patients will be randomized to participate in one of the two groups: 2-4 nights under closed loop control while the MD-Logic learning algorithm is activated or 2-4 nights under closed loop control without activating the MD-Logic learning algorithm. In part 2 of the forth segment 30-40 patients will participate in two consecutive24-48 hours sessions,one under closed loop control and the second under sensor augmented pump therapy.

On the fifth segment 40-80 eligible patients will be enrolled at the Israeli center only.The first 10 patients will participate in a pilot session and data gathered at this pilot session will not be used at the final analysis.This segment will consist of two parts. At part 1 each subject will participate in 4weeks-1.5 months period of over nights either using closed-loop with MDLAP or using sensor augmented pump (SAP) therapy.At the end of the first 4 weeks-1.5 months of the study, statistical analysis will be performed in order to decide whether to extend the study with an optional period of extra 4 weeks-1.5 months.In case it will be decided to extend the study, additional 4 weeks-1.5 months intervention period following completion of final visit activities will be offered to participants. Subjects that have participated in the control group (sensor augmented pump therapy) will be offered the opportunity to continue to 4 weeks-1.5 months of closed-loop control and the study group will be offered to switch to sensor augmented pump therapy. In segment 5 part 2, up to 40 patients will be enrolled. Each patient will participate in 3 months study period either using overnight closed loop under MDLAP or sensor augmented pump therapy.Participants in segment 5 part 2 will be offered to participate in part 2A. At this part, sleep quality assessment will be made (by using actigraf and sleep questionnaire) At the end of this period an optional 3 months extension period will be offered with the other arm (cross-over)

Segment 6 will be consist of two main parts.In part 1, up to 40 eligible patients will be enrolled at the Israeli center only. Each subject will participate in up to 72 hours of closed-loop with MDLAP at home and up to 72 hours under regular sensor augmented pump therapy . The sequence of the treatment intervention will be randomly assigned. The sequence of the treatment intervention will be randomly assigned. In part 2 of this segment 40 eligible patients will enrolled at the Israeli center only. Each subject will participate in up to 2 weeks of closed loop with MDLAP at home and up to 2 weeks under regular sensor augmented pump therapy. The sequence of the treatment intervention will be randomly assigned

Objectives: The objective of this feasibility study is to evaluate the safety and efficacy of blood glucose control using the MD-Logic Artificial Pancreas System in individuals with type 1 diabetes in the hospital settings,at a diabetes camp and finally at patient's home.

In the last two decades, remarkable technological progress has been made with the development of continuous glucose sensors, miniature devices, implantable pumps and sensors and wireless communications, interest in the closed-loop insulin delivery was revived.

Control trails that evaluate the clinical benefits of continuous glucose sensor have shown improved HbA1c with no significant increase in sever hypoglycemia, trend towards lower hypoglycemic episodes although not significant and no significant change in sever hypoglycemia. One of the main drawbacks of continuous glucose sensor is noncompliant of the patient, the flow of information and the need to act accordingly makes this devise a burden for some patients. Theoretically subcutaneous insulin pumps and glucose sensors attached to an artificial pancreas in a closed-loop system can mimic the activity of functioning pancreatic beta cells, with strict control of blood glucose levels. Such a system may also offer an opportunity to free the patients from the daily burden of dealing with their diabetes.

We developed the MD-Logic Artificial Pancreas (MDLAP) which is based on a model which imitates the logic of diabetes care givers.

We aimed to evaluate blood glucose control overnight under closed- loop insulin delivery with MD-Logic Artificial Pancreas (MDLAP) system in patients with type 1 diabetes in the hospital settings,at diabetes camp settings and finally at patient's home .

Study Objectives To determine the safety and efficacy of using the MDLAP system to automatically control blood glucose in type 1 diabetic patients.

Study Scope This is a three center, prospective pilot trail to evaluate blood glucose control under closed-loop insulin delivery with MD-Logic Artificial Pancreas (MDLAP) system in patients with type 1 diabetes, being conducted in: Tel Aviv, Israel;Ljubljana, Slovenia and Hannover, Germany

Study will be consist from six segments:

In segment 1, 15 eligible patients will be enrolled for the pilot study. 5 patients will be recruited at each center.Data generated from the first patient at each center will not be included at the final statistical analysis and will be used to assess logistical and training issues only.

On the second segment, 54 eligible subjects will be enrolled (18 at each center). Each subject will participate in the two consecutive overnight sessions in diabetes camp settings, one under closed-loop with MDLAP and one under sensor augmented pump therapy. Staying at a camp, can represent the home setting, but has on site the support of a medical team trained in diabetes. A remote safety and control diabetes management system will be utilized at this segment to enable the supervising personnel to alert the patient and intervene in cases of impending hypoglycemia, long standing hyperglycemia and technical faults of any component of the AP system.

In the third segment,9-20 eligible patients will be enrolled at the Israeli center only.Each subject will participate in up to four consecutive overnight under closed loop with MDLAP and up to four additional overnight under regular sensor augmented pump therapy at home.In similar to segment 2, we will use also at segment 3 the remote safety and control diabetes management system which enable the supervising personnel to alert the patient or parents and intervene in cases of impending hypoglycemia, long standing hyperglycemia and technical faults of any component of the AP system.

On the fourth segment, 45-60 patients will be enrolled at the Israeli center only, This segment will be conducted at a diabetes camp and will consist of two main parts. In part 1, 15-20 patients will be randomized to participate in one of the two groups: 2-4 nights under closed loop control while the MD-Logic learning algorithm is activated or 2-4 nights under closed loop control without activating the MD-Logic learning algorithm. In part 2 of the forth segment 30-40 patients will participate in two consecutive 24-48 hours sessions,one under closed loop control and the second under sensor augmented pump therapy.

On the fifth segment 40-80 eligible patients will be enrolled at the Israeli center only and will be conducted at patient's home. This segment will consist of two main parts .The first 10 patients will participate in a pilot session and data gathered at this pilot session will not be used at the final analysis. At part 1 each subject will participate in 4 weeks-1.5 months period of over nights either using closed-loop with MDLAP or using sensor augmented pump (SAP) therapy.At the end of the first 4 weeks-1.5 months of the study, statistical analysis will be performed in order to decide whether to extend the study with an optional period of extra 4 weeks-1.5 months.In case it will be decided to extend the study, additional 4 weeks-1.5 months intervention period following completion of final visit activities will be offered to participants. Subjects that have participated in the control group (sensor augmented pump therapy) will be offered the opportunity to continue to 4 weeks-1.5 months of closed-loop control and the study group will be offered to switch to sensor augmented pump therapy. In segment 5 part 2, up to 40 patients will be enrolled. Each patient will participate in 3 months study period either using overnight closed loop under MDLAP or sensor augmented pump therapy. Participants in segment 5 part 2 will be offered to participate in part 2A. At this part, sleep quality assessment will be made (by using actigraf and sleep questionnaire). At the end of this period an optional 3 months extension period will be offered with the other arm (cross-over).

Segment 6 will be consist of two main parts.In part 1 up to 40 eligible patients will be enrolled at the Israeli center only. Each subject will participate in up to 72 hours of closed-loop with MDLAP at home and up to 72 hours under regular sensor augmented pump therapy . The sequence of the treatment intervention will be randomly assigned. In part 2 of this segment 40 eligible patients will enrolled at the Israeli center only. Each subject will participate in up to 2 weeks of closed loop with MDLAP at home and up to 2 weeks under regular sensor augmented pump therapy. The sequence of the treatment intervention will be randomly assigned

Inclusion Criteria:

• Subject with Type 1 diabetes (>1yr since diagnosis)
• Insulin infusion pump therapy for at least 3 months
• Patients whom uses continuous glucose sensor for at least 2 weeks(for segment 5) or will undergo run-in period of 2 weeks of glucose sensor wear before continue to baseline assessment (only for patients participating at segment 3 and 4)
• Age ≥ 10 years until 65 years
• HbA1c at inclusion ≥ 6.5 and <10
• Patients willing to follow trail instructions
• Patients live with at least one other adult person (segment 3, 5, and 6 only)
• BMI Standard Deviation Score - below the 97th percentile for age(in segment 5 and 6 BMI SDS - below the 95th percentile for age)
• An internet connection at patient's home (only for patients participating at segment 3 and 6)
• Patients with care givers who are capable of operating a computer based system

Exclusion Criteria:

• Concomitant diseases that influence metabolic control
• Participation in any other interventional study
• Known or suspected allergy to trial products
• Any significant diseases or conditions including psychiatric disorders and substance abuse that, in the opinion of the investigator, is likely to affect the subject's ability to complete the study, or compromise patient safety
• Diabetic ketoacidosis in the past 1 month.
• Severe hypoglycemia resulting in seizure or loss of consciousness in the month prior to enrollment.
• Current use of oral glucocorticoids or other medications, which in the judgment of the investigator would be a contraindication to participation in the study.
• Subject is participating in another drug or device study that could affect glucose measurements or glucose management.