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Closing the Loop for 36 Hours in Adolescents With Type 1 Diabetes

NCT01074801 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 12

Last updated 2011-04-06

No results posted yet for this study

Summary

High variability of blood sugar levels and high incidence of night-time hypoglycaemia (low blood sugar) in young people with type 1 diabetes (T1D) make achieving the treatment goals in this population extremely challenging.

Our ongoing research focuses on the development of a closed-loop glucose control in children and adolescents with T1D. The three components of the closed-loop system are a continuous glucose monitor, an insulin pump, and a computer-based algorithm. The studies performed thus far evaluated the efficacy and safety of overnight closed-loop glucose control. The results showed that overnight closed-loop improved control of blood glucose and prevented nocturnal hypoglycaemia, as compared to the conventional insulin pump therapy. The next objective is to evaluate the efficacy and safety of closed-loop insulin delivery over a prolonged time period, including the daytime, when normal living activities occur. This will pave the way for a more comprehensive use of closed loop systems to control glucose levels in T1D.

The present study adopts an open-label, randomised, 2-period cross-over design whereby the safety and efficacy of closed-loop insulin therapy will be compared with the conventional insulin pump therapy in 12 adolescents with T1D. Participants aged 12 to 18 years will be randomised for two 36 hour studies in a clinical research facility, during which glucose levels will be controlled by either the computer-based closed-loop algorithm (intervention arm) or by conventional insulin pump therapy (control arm). During both studies participants will perform normal daily activities, i.e. playing, reading, snacking and physical activity. On both occasions, the Actiheart, a combined heart rate and movement sensor will be used to accurately quantify each subject's individual physical activity energy expenditure during the 36 hour study period and for 36 hours of free living during weekday.

Conditions

Interventions

OTHER

Closed-loop insulin delivery

Basal subcutaneous insulin delivery to be adjusted at 15min cycles according to the computer-based algorithm advice.

OTHER

Standard insulin pump treatment

Subcutaneous insulin delivery to be performed based on subjects' standard treatment

Sponsors & Collaborators

Principal Investigators

  • Roman Hovorka, PhD · University of Cambridge

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
CROSSOVER

Eligibility

Min Age
12 Years
Max Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2010-03-31
Primary Completion
2010-10-31
Completion
2010-10-31

Countries

  • United Kingdom

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01074801 on ClinicalTrials.gov