Closed-loop Control of Overnight Glucose Levels in Adults and Adolescents With Type 1 Diabetes
18 octobre 2014 mis à jour par: Rémi Rabasa-Lhoret, Institut de Recherches Cliniques de Montreal
An Open-label, Randomized, Three-way, Multicenter Study to Compare the Efficacy of Single-hormone Closed-loop Strategy, Dual-hormone Closed-loop Strategy and Conventional Insulin Pump Therapy in Regulating Overnight Glucose Levels at Home in Adolescents and Adults With Type 1 Diabetes
Closed-loop strategy 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. A dual-hormone closed-loop system would regulate glucose levels through the infusion of two hormone: insulin and glucagon.
The main objective of this project is to compare the efficacy of single-hormone closed-loop strategy, dual-hormone closed-loop strategy and pump therapy to regulate overnight glucose levels in a out-patient study in adults and adolescents with type 1 diabetes.
The investigators hypothesized that dual-hormone closed-loop strategy is more effective in regulating overnight glucose levels in adults and adolescents with type 1 diabetes compared to single-hormone closed-loop strategy, which in turn is more effective than the conventional pump therapy.
Aperçu de l'étude
Statut
Complété
Les conditions
Intervention / Traitement
Description détaillée
Closed-loop strategy 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. A dual-hormone closed-loop system would regulate glucose levels through the infusion of two hormone: insulin and glucagon.
We aim to conduct a multicenter study to compare the efficacy of conventional pump therapy, single-hormone closed-loop strategy and dual-hormone closed-loop strategy to regulate overnight glucose levels, at home, in adolescents and adults with type 1 diabetes. Each intervention will be tested on two nights: 1) After a carbohydrate-rich dinner meal (to exaggerate hyperglycemic risk and; 2) After an evening exercise (to exaggerate hypoglycemic risk).
Type d'étude
Interventionnel
Inscription (Réel)
28
Phase
- Phase 2
Contacts et emplacements
Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.
Lieux d'étude
-
-
Ontario
-
Toronto, Ontario, Canada
- Mount Sinai Hospital
-
-
Quebec
-
Montreal, Quebec, Canada
- Institut de recherches cliniques de Montréal
-
Montreal, Quebec, Canada
- Montreal Children Hospital
-
-
Critères de participation
Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.
Critère d'éligibilité
Âges éligibles pour étudier
12 ans et plus (Enfant, Adulte, Adulte plus âgé)
Accepte les volontaires sains
Non
Sexes éligibles pour l'étude
Tout
La description
Inclusion Criteria:
- Males and females aged ≥ 12 years of old.
- Body mass index < 35
- Clinical diagnosis of type 1 diabetes for at least one year.
- The subject will have been on insulin pump therapy for at least 4 months.
- HbA1c < 12%.
- At least two visits with an endocrinology team in the past 1 year.
Exclusion Criteria:
- Clinically significant nephropathy, neuropathy (peripheral or autonomic e.g. significant gastroparesis) or retinopathy as judged by the investigator.
- Recent (< 6 months) acute macrovascular event e.g. acute coronary syndrome or cardiac surgery.
- A recent injury to body or limb, muscular disorder, use of any medication or other significant medical disorder if that injury, medication or disease in the judgment of the investigator will affect the completion of the exercise protocol.
- Ongoing pregnancy.
- Severe hypoglycemic episode within two weeks of screening.
- Current use of glucocorticoid medication (except low stable dose and inhaled therapy).
- Known or suspected allergy to the insulin aspart, glucagon, Medtronic sensors, or Medtronic infusion sets..
- Other serious medical illness likely to interfere with study participation or with the ability to complete the trial by the judgment of the investigator.
- Anticipating a significant change in treatment regimen between admissions (such as a major change in an exercise routine, significant change in dietary routine or in insulin therapy.
- Failure to comply with team's recommendations.
Plan d'étude
Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation croisée
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Comparateur actif: Conventional insulin pump therapry
Subjects will use conventional pump therapy to regulate their glucose levels.
|
At 19:30, patients will eat a standardized large meal (110g carbohydrate for males; 90g carbohydrate for females).
Conventional insulin pump therapy or closed-loop system will be use to control glucose levels from 21:00 until 7:00 next morning.
Study participants will go to a training facility around 18:00 to perform a 60min workout at 60% heart rate reserve.
The workout will be on a treadmill and/or a stationary bicycle.
Conventional insulin pump therapy or closed-loop system will be use to regulate glucose levels from 21:00 until 7:00 next morning.
|
|
Comparateur actif: Single-hormone closed-loop system
Variable subcutaneous insulin infusion rate will be used to regulate glucose levels.
Insulin Aspart (Novorapid) will be infused using a subcutaneous infusion pump.
The glucose level as measured by the real time sensor 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 recommendations of infusion rates.
|
At 19:30, patients will eat a standardized large meal (110g carbohydrate for males; 90g carbohydrate for females).
Conventional insulin pump therapy or closed-loop system will be use to control glucose levels from 21:00 until 7:00 next morning.
Study participants will go to a training facility around 18:00 to perform a 60min workout at 60% heart rate reserve.
The workout will be on a treadmill and/or a stationary bicycle.
Conventional insulin pump therapy or closed-loop system will be use to regulate glucose levels from 21:00 until 7:00 next morning.
|
|
Comparateur actif: Dual-hormone closed-loop system
Insulin Aspart (Novorapid) and glucagon (Paladin) will be infused using two separate subcutaneous infusion pumps.
The glucose levels as measured by the real time sensor will be entered manually into the computer every 10 minutes.
The pumps' infusion rate will then be changed manually based on the computer generated-recommendation delivery levels.
|
At 19:30, patients will eat a standardized large meal (110g carbohydrate for males; 90g carbohydrate for females).
Conventional insulin pump therapy or closed-loop system will be use to control glucose levels from 21:00 until 7:00 next morning.
Study participants will go to a training facility around 18:00 to perform a 60min workout at 60% heart rate reserve.
The workout will be on a treadmill and/or a stationary bicycle.
Conventional insulin pump therapy or closed-loop system will be use to regulate glucose levels from 21:00 until 7:00 next morning.
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Percentage of time in target range
Délai: 8 hours
|
Percentage of time for which glucose levels (as measured by the glucose sensor) are in target range.
Target range is defined to be between 4.0 to 8.0 mmol/L
|
8 hours
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Percentage of time in target range for each night separately
Délai: 8 hours
|
Percentage of time for which glucose levels are in target range for each night separately.
Target range is defined to be between 4.0 and 8.0 mmol/L.
|
8 hours
|
|
Percentage of time in target range for the pooled data
Délai: 8 hours
|
Percentage of time for which glucose levels are in target range for the pooled data.
Target range is defined to be between 4.0 to 8.0 mmol/L.
|
8 hours
|
|
Percentage of time spent below 4.0 mmol/L
Délai: 8 hours
|
Percentage of time for which glucose levels are below 4.0 mmol/L.
|
8 hours
|
|
Percentage of time spent below 3.3 mmol/L
Délai: 8 hours
|
Percentage of time for which glucose levels are spent below 3.3 mmol/L.
|
8 hours
|
|
Area under the curve for glucose levels below 4.0 mmol/L
Délai: 8 hours
|
8 hours
|
|
|
Area under the curve for glucose levels below 3.3 mmol/L
Délai: 8 hours
|
8 hours
|
|
|
Percentage of time spent above 8.0 mmol/L
Délai: 8 hours
|
Percentage of time for which glucose levels are above 8.0 mmol/L
|
8 hours
|
|
Percentage of time spent above 10.0 mmol/L
Délai: 8 hours
|
Percentage of time for which glucose levels are above 10.0 mmol/L.
|
8 hours
|
|
Area under the curve for glucose levels spent above 8.0 mmol/L
Délai: 8 hours
|
8 hours
|
|
|
Area under the curve for glucose levels spent above 10.0 mmol/L
Délai: 8 hours
|
8 hours
|
|
|
Mean glucose levels
Délai: 8 hours
|
8 hours
|
|
|
Standard deviation of glucose levels
Délai: 8 hours
|
Standard deviation of glucose levels as a measure of glucose variability.
|
8 hours
|
|
Total insulin delivery
Délai: 8 hours
|
8 hours
|
|
|
Number of subjects experiencing at least one hypoglycemic event requiring treatment
Délai: 8 hours
|
8 hours
|
|
|
Number of hypoglycemic events requiring treatment
Délai: 8 hours
|
8 hours
|
Collaborateurs et enquêteurs
C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.
Collaborateurs
Les enquêteurs
- Chercheur principal: Bruce Perkins, Mount Sinai Hospital
Publications et liens utiles
La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.
Dates d'enregistrement des études
Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.
Dates principales de l'étude
Début de l'étude
1 juillet 2013
Achèvement primaire (Réel)
1 septembre 2014
Achèvement de l'étude (Réel)
1 septembre 2014
Dates d'inscription aux études
Première soumission
12 juillet 2013
Première soumission répondant aux critères de contrôle qualité
17 juillet 2013
Première publication (Estimation)
22 juillet 2013
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
21 octobre 2014
Dernière mise à jour soumise répondant aux critères de contrôle qualité
18 octobre 2014
Dernière vérification
1 octobre 2014
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- CLASS-04
Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .