- ICH GCP
- Registr klinických studií v USA
- Klinická studie NCT02855307
Closed-loop Control of Glucose Levels (Artificial Pancreas) During Postprandial Exercise in Adults With Type 1 Diabetes
A Single-blind, Randomized, Cross-over Study to Assess the Efficacy of Single-hormone Closed-loop Strategy at Preventing Hypoglycemia During Unannounced and Announced Exercise in Adults With Type 1 Diabetes
Regular physical activity is associated with many health benefits for individuals with type 1 diabetes including improved cardiovascular fitness and vascular health, decreased insulin requirements, improved body composition and quality of life. However, exercise-induced hypoglycemia is very frequent and thus is the main limiting factor for physical activity practice in this population.
The artificial pancreas is composed of three components: glucose sensor to read glucose levels, insulin pump to infuse insulin and a dosing mathematical algorithm to decide on the required insulin dosages based on the sensor's readings. The artificial pancreas has the potential to reduce the risk of exercise-induced hypoglycemia but the importance of announcing exercise to the artificial pancreas is yet to be explored.
The objective of this study is to investigate 1) if announcing postprandial exercise to the artificial pancreas is beneficial in reducing the risk of hypoglycemia and 2) if an insulin bolus reduction is necessary when announcing the exercise to the artificial pancreas.
Přehled studie
Postavení
Podmínky
Typ studie
Zápis (Aktuální)
Fáze
- Fáze 2
Kontakty a umístění
Studijní místa
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Quebec
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Montreal, Quebec, Kanada, H2W 1R7
- Institut de recherches cliniques de Montreal
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Kritéria účasti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Popis
Inclusion Criteria:
- Males and females ≥ 18 years of old.
- Clinical diagnosis of type 1 diabetes for at least one year.
- The subject will have been on insulin pump therapy for at least 3 months.
- Last (less than 3 months) HbA1c ≤ 12%.
Exclusion Criteria:
- Clinically significant microvascular complications: nephropathy (estimated glomerular filtration rate below 40 ml/min), neuropathy (especially diagnosed gastroparesis) or severe proliferative retinopathy as judged by the investigator.
- Recent (< 3 months) acute macrovascular event e.g. acute coronary syndrome or cardiac surgery.
- Use of medication with an effect on heart rate (e.g. beta-blockers).
- Abnormal blood panel and/or anemia.
- Ongoing or planned pregnancy.
- Severe hypoglycemic episode within two weeks of screening.
- Other serious medical illness likely to interfere with study participation or with the ability to complete the exercise periods by the judgment of the investigator (e.g. orthopedic limitation).
- Failure to comply with team's recommendations (e.g. not willing to eat snack, not willing to change pump parameters, etc).
- Problems with venous access.
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Léčba
- Přidělení: Randomizované
- Intervenční model: Crossover Assignment
- Maskování: Singl
Zbraně a zásahy
Skupina účastníků / Arm |
Intervence / Léčba |
|---|---|
|
Aktivní komparátor: Unannounced exercise
The target blood glucose of the algorithm will be as usual.
A pre-meal full insulin bolus will be given.
|
Bude použit obvyklý rychle působící analog inzulínu pacienta.
Glukózový senzor Dexcom G4 Platinum bude použit k měření hladin glukózy.
Patients will be admitted at the research clinical facility at 6:30.
The artificial pancreas intervention will start at 7:00.
A standardized breakfast will be served at 8:00.
At 9:30, patients will performed a 60-minute exercise on the ergocycle at 60% of VO2 max.
At 11:30, patients will be switched to standard insulin pump therapy and a lunch will be served.
Patients will be discharged after lunch consumption.
Patient's insulin pump will be used to infuse insulin.
Variable subcutaneous insulin infusion rates will be used to regulate glucose levels.
Patient's usual fast acting insulin analog (Lispro, Aspart or Guilisine) will be infused using the patient's pump.
The glucose level as measured by the real time sensor (Dexcom G4 Platinum, Dexcom Inc.) will be entered manually into the computer every 10 minutes.
The pump's infusion rate will then be changed manually based on the computer generated recommendation infusion rates.
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Aktivní komparátor: Announced exercise with pre-meal full bolus
The target blood glucose of the algorithm will be increased and a pre-meal full bolus will be given
|
Bude použit obvyklý rychle působící analog inzulínu pacienta.
Glukózový senzor Dexcom G4 Platinum bude použit k měření hladin glukózy.
Patients will be admitted at the research clinical facility at 6:30.
The artificial pancreas intervention will start at 7:00.
A standardized breakfast will be served at 8:00.
At 9:30, patients will performed a 60-minute exercise on the ergocycle at 60% of VO2 max.
At 11:30, patients will be switched to standard insulin pump therapy and a lunch will be served.
Patients will be discharged after lunch consumption.
Patient's insulin pump will be used to infuse insulin.
Variable subcutaneous insulin infusion rates will be used to regulate glucose levels.
Patient's usual fast acting insulin analog (Lispro, Aspart or Guilisine) will be infused using the patient's pump.
The glucose level as measured by the real time sensor (Dexcom G4 Platinum, Dexcom Inc.) will be entered manually into the computer every 10 minutes.
The pump's infusion rate will then be changed manually based on the computer generated recommendation infusion rates.
|
|
Aktivní komparátor: Announced exercise with reduced insulin bolus
The target blood glucose of the algorithm will be increased and the pre-meal insulin bolus will be reduced by 33%.
|
Bude použit obvyklý rychle působící analog inzulínu pacienta.
Glukózový senzor Dexcom G4 Platinum bude použit k měření hladin glukózy.
Patients will be admitted at the research clinical facility at 6:30.
The artificial pancreas intervention will start at 7:00.
A standardized breakfast will be served at 8:00.
At 9:30, patients will performed a 60-minute exercise on the ergocycle at 60% of VO2 max.
At 11:30, patients will be switched to standard insulin pump therapy and a lunch will be served.
Patients will be discharged after lunch consumption.
Patient's insulin pump will be used to infuse insulin.
Variable subcutaneous insulin infusion rates will be used to regulate glucose levels.
Patient's usual fast acting insulin analog (Lispro, Aspart or Guilisine) will be infused using the patient's pump.
The glucose level as measured by the real time sensor (Dexcom G4 Platinum, Dexcom Inc.) will be entered manually into the computer every 10 minutes.
The pump's infusion rate will then be changed manually based on the computer generated recommendation infusion rates.
|
Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Časové okno |
|---|---|
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Percentage of time of plasma glucose levels spent below 3.9 mmol/L
Časové okno: From 9:30 to 11:30 (120 minutes)
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From 9:30 to 11:30 (120 minutes)
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Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Relative decrease in glucose levels during exercise compared to pre-breakfast levels
Časové okno: From 8:00 to 10:50 (170 minutes)
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Difference between pre-breakfast levels and the lowest glucose level from the start of the exercise until 20 minutes after exercise
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From 8:00 to 10:50 (170 minutes)
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Number of patients experiencing exercise-induced hypoglycemia requiring treatment
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Decremental area under the curve from the start of the exercise
Časové okno: From 9:30 to 11:00 (90 minutes)
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From 9:30 to 11:00 (90 minutes)
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Percentage of time of plasma glucose levels spent below 3.9 mmol/L
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Percentage of time of plasma glucose levels spent below 3.3 mmol/L
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Percentage of time of plasma glucose levels spent below 2.8 mmol/L
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Percentage of time of plasma glucose levels spent between 3.9 and 7.8 mmol/L
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Percentage of time of plasma glucose levels spent above 10 mmol/L
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Percentage of time of plasma glucose levels spent above 13.9 mmol/L
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Percentage of time of plasma glucose levels spent above 16.7 mmol/L
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Mean plasma glucose levels
Časové okno: From 8:00 to 11:30 (210 minutes)
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From 8:00 to 11:30 (210 minutes)
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Standard deviation of glucose levels
Časové okno: From 8:00 to 11:30 (210 minutes)
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From 8:00 to 11:30 (210 minutes)
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Coefficient of variation of glucose levels
Časové okno: From 8:00 to 11:30 (210 minutes)
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From 8:00 to 11:30 (210 minutes)
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Mean time (minutes) to the first hypoglycemic event
Časové okno: From 9:30 to 10:30 (60 minutes)
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From 9:30 to 10:30 (60 minutes)
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Spolupracovníci a vyšetřovatelé
Publikace a užitečné odkazy
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia
Primární dokončení (Aktuální)
Dokončení studie (Aktuální)
Termíny zápisu do studia
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Odhad)
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Více informací
Termíny související s touto studií
Klíčová slova
Další relevantní podmínky MeSH
- Poruchy metabolismu glukózy
- Metabolické choroby
- Onemocnění imunitního systému
- Autoimunitní onemocnění
- Onemocnění endokrinního systému
- Diabetes Mellitus
- Diabetes mellitus, typ 1
- Hypoglykemická činidla
- Fyziologické účinky léků
- Hormony, hormonální náhražky a antagonisté hormonů
- Inzulín
- Inzulin, Globin Zinek
- Hormony
Další identifikační čísla studie
- CLASS-16
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