Type 1 Diabetes Clinical Trial
Official title:
Randomised, Two-Period Crossover Study to Assess the Efficacy of Overnight Computer-based Glucose Control Compared With Conventional Pump Therapy Following the Consumption of Alcohol in Adults With Type 1 Diabetes
The main objective is to assess the efficacy and safety of overnight automated closed loop glucose control using a computer-based algorithm compared with conventional insulin pump therapy in adults with type 1 diabetes following the consumption of a moderate amount of alcohol at dinnertime.
People with type 1 diabetes need regular insulin injections or continuous delivery of
insulin using an insulin pump. Keeping blood sugars in the normal range is known to reduce
the risk of long term complications involving the eyes, kidneys and heart. However,
achieving treatment goals can be very difficult as the tighter we try to control blood
glucose levels, the greater the risk of the person developing episodes of low glucose levels
(hypoglycaemia). One solution is using a system where the amount of insulin injected closely
matches the blood sugar levels on a continuous basis. This can be achieved by what is known
as a "closed loop system" where a small glucose sensor placed under the skin communicates
with a computer containing an algorithm that drives a subcutaneous insulin pump. This system
is being developed in Cambridge and is undergoing trials in children and adults with type 1
diabetes. Results thus far show that the system is very effective at preventing
hypoglycaemia and maintaining blood glucose levels in target range.
We plan to test the closed loop in various challenging conditions faced by patients in daily
life. One of these is the consumption of alcohol, which can give rise to delayed
hypoglycaemia in patients with diabetes. The studies will be done in a clinical research
facility under supervised conditions. Subjects will attend for two study nights where they
will receive a specific volume of alcohol with an evening meal. On one night this will be
followed by closed loop algorithm control of their insulin overnight. On the other (control)
night subjects will remain on their usual pump therapy regime overnight.
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Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Crossover Assignment, Masking: Open Label, Primary Purpose: Treatment
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