Overnight Glucose Control With an Automated, Unified Safety System in Children and Adolescents With Type 1 Diabetes at Diabetes Camp

To determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and adolescents with type 1 diabetes attending diabetes summer camps. The Diabetes Assistant (DIAS) USS used the Dexcom G4 Platinum glucose sensor (Dexcom) an...

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Published inDiabetes care Vol. 37; no. 8; pp. 2310 - 2316
Main Authors Ly, Trang T., Breton, Marc D., Keith-Hynes, Patrick, De Salvo, Daniel, Clinton, Paula, Benassi, Kari, Mize, Benton, Chernavvsky, Daniel, Place, Jéróme, Wilson, Darrell M., Kovatchev, Boris P., Buckingham, Bruce A.
Format Journal Article
LanguageEnglish
Published Alexandria, VA American Diabetes Association 01.08.2014
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ISSN0149-5992
1935-5548
1935-5548
DOI10.2337/dc14-0147

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Abstract To determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and adolescents with type 1 diabetes attending diabetes summer camps. The Diabetes Assistant (DIAS) USS used the Dexcom G4 Platinum glucose sensor (Dexcom) and t:slim insulin pump (Tandem Diabetes Care). An initial inpatient study was completed for 12 participants to evaluate safety. For the main camp study, 20 participants with type 1 diabetes were randomized to either OCL or sensor-augmented therapy (control conditions) per night over the course of a 5- to 6-day diabetes camp. Subjects completed 54 OCL nights and 52 control nights. On an intention-to-treat basis, with glucose data analyzed regardless of system status, the median percent time in range, from 70-150 mg/dL, was 62% (29, 87) for OCL nights versus 55% (25, 80) for sensor-augmented pump therapy (P = 0.233). A per-protocol analysis allowed for assessment of algorithm performance. The median percent time in range, from 70-150 mg/dL, was 73% (50, 89) for OCL nights (n = 41) versus 52% (24, 83) for control conditions (n = 39) (P = 0.037). There was less time spent in the hypoglycemic range <50, <60, and <70 mg/dL during OCL compared with the control period (P = 0.019, P = 0.009, and P = 0.023, respectively). The DIAS USS algorithm is effective in improving time spent in range as well as reducing nocturnal hypoglycemia during the overnight period in children and adolescents with type 1 diabetes in a diabetes camp setting.
AbstractList To determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and adolescents with type 1 diabetes attending diabetes summer camps. The Diabetes Assistant (DIAS) USS used the Dexcom G4 Platinum glucose sensor (Dexcom) and t:slim insulin pump (Tandem Diabetes Care). An initial inpatient study was completed for 12 participants to evaluate safety. For the main camp study, 20 participants with type 1 diabetes were randomized to either OCL or sensor-augmented therapy (control conditions) per night over the course of a 5- to 6-day diabetes camp. Subjects completed 54 OCL nights and 52 control nights. On an intention-to-treat basis, with glucose data analyzed regardless of system status, the median percent time in range, from 70-150 mg/dL, was 62% (29, 87) for OCL nights versus 55% (25, 80) for sensor-augmented pump therapy (P = 0.233). A per-protocol analysis allowed for assessment of algorithm performance. The median percent time in range, from 70-150 mg/dL, was 73% (50, 89) for OCL nights (n = 41) versus 52% (24, 83) for control conditions (n = 39) (P = 0.037). There was less time spent in the hypoglycemic range <50, <60, and <70 mg/dL during OCL compared with the control period (P = 0.019, P = 0.009, and P = 0.023, respectively). The DIAS USS algorithm is effective in improving time spent in range as well as reducing nocturnal hypoglycemia during the overnight period in children and adolescents with type 1 diabetes in a diabetes camp setting.
To determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and adolescents with type 1 diabetes attending diabetes summer camps.OBJECTIVETo determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and adolescents with type 1 diabetes attending diabetes summer camps.The Diabetes Assistant (DIAS) USS used the Dexcom G4 Platinum glucose sensor (Dexcom) and t:slim insulin pump (Tandem Diabetes Care). An initial inpatient study was completed for 12 participants to evaluate safety. For the main camp study, 20 participants with type 1 diabetes were randomized to either OCL or sensor-augmented therapy (control conditions) per night over the course of a 5- to 6-day diabetes camp.RESEARCH DESIGN AND METHODSThe Diabetes Assistant (DIAS) USS used the Dexcom G4 Platinum glucose sensor (Dexcom) and t:slim insulin pump (Tandem Diabetes Care). An initial inpatient study was completed for 12 participants to evaluate safety. For the main camp study, 20 participants with type 1 diabetes were randomized to either OCL or sensor-augmented therapy (control conditions) per night over the course of a 5- to 6-day diabetes camp.Subjects completed 54 OCL nights and 52 control nights. On an intention-to-treat basis, with glucose data analyzed regardless of system status, the median percent time in range, from 70-150 mg/dL, was 62% (29, 87) for OCL nights versus 55% (25, 80) for sensor-augmented pump therapy (P = 0.233). A per-protocol analysis allowed for assessment of algorithm performance. The median percent time in range, from 70-150 mg/dL, was 73% (50, 89) for OCL nights (n = 41) versus 52% (24, 83) for control conditions (n = 39) (P = 0.037). There was less time spent in the hypoglycemic range <50, <60, and <70 mg/dL during OCL compared with the control period (P = 0.019, P = 0.009, and P = 0.023, respectively).RESULTSSubjects completed 54 OCL nights and 52 control nights. On an intention-to-treat basis, with glucose data analyzed regardless of system status, the median percent time in range, from 70-150 mg/dL, was 62% (29, 87) for OCL nights versus 55% (25, 80) for sensor-augmented pump therapy (P = 0.233). A per-protocol analysis allowed for assessment of algorithm performance. The median percent time in range, from 70-150 mg/dL, was 73% (50, 89) for OCL nights (n = 41) versus 52% (24, 83) for control conditions (n = 39) (P = 0.037). There was less time spent in the hypoglycemic range <50, <60, and <70 mg/dL during OCL compared with the control period (P = 0.019, P = 0.009, and P = 0.023, respectively).The DIAS USS algorithm is effective in improving time spent in range as well as reducing nocturnal hypoglycemia during the overnight period in children and adolescents with type 1 diabetes in a diabetes camp setting.CONCLUSIONSThe DIAS USS algorithm is effective in improving time spent in range as well as reducing nocturnal hypoglycemia during the overnight period in children and adolescents with type 1 diabetes in a diabetes camp setting.
To determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and adolescents with type 1 diabetes attending diabetes summer camps. The Diabetes Assistant (DIAS) USS used the Dexcom G4 Platinum glucose sensor (Dexcom) and t:slim insulin pump (Tandem Diabetes Care). An initial inpatient study was completed for 12 participants to evaluate safety. For the main camp study, 20 participants with type 1 diabetes were randomized to either OCL or sensor-augmented therapy (control conditions) per night over the course of a 5- to 6-day diabetes camp. Subjects completed 54 OCL nights and 52 control nights. On an intention-to-treat basis, with glucose data analyzed regardless of system status, the median percent time in range, from 70-150 mg/dL, was 62% (29, 87) for OCL nights versus 55% (25, 80) for sensor-augmented pump therapy (P = 0.233). A per-protocol analysis allowed for assessment of algorithm performance. The median percent time in range, from 70-150 mg/dL, was 73% (50, 89) for OCL nights (n = 41) versus 52% (24, 83) for control conditions (n = 39) (P = 0.037). There was less time spent in the hypoglycemic range <50, <60, and <70 mg/dL during OCL compared with the control period (P = 0.019, P = 0.009, and P = 0.023, respectively). The DIAS USS algorithm is effective in improving time spent in range as well as reducing nocturnal hypoglycemia during the overnight period in children and adolescents with type 1 diabetes in a diabetes camp setting.
OBJECTIVE To determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and adolescents with type 1 diabetes attending diabetes summer camps. RESEARCH DESIGN AND METHODS The Diabetes Assistant (DIAS) USS used the Dexcom G4 Platinum glucose sensor (Dexcom) and t:slim insulin pump (Tandem Diabetes Care). An initial inpatient study was completed for 12 participants to evaluate safety. For the main camp study, 20 participants with type 1 diabetes were randomized to either OCL or sensor-augmented therapy (control conditions) per night over the course of a 5- to 6-day diabetes camp. RESULTS Subjects completed 54 OCL nights and 52 control nights. On an intention-to-treat basis, with glucose data analyzed regardless of system status, the median percent time in range, from 70-150 mg/dL, was 62% (29, 87) for OCL nights versus 55% (25, 80) for sensor-augmented pump therapy (P = 0.233). A per-protocol analysis allowed for assessment of algorithm performance. The median percent time in range, from 70-150 mg/dL, was 73% (50, 89) for OCL nights (n = 41) versus 52% (24, 83) for control conditions (n = 39) (P = 0.037). There was less time spent in the hypoglycemic range <50, <60, and <70 mg/dL during OCL compared with the control period (P = 0.019, P = 0.009, and P = 0.023, respectively). CONCLUSIONS The DIAS USS algorithm is effective in improving time spent in range as well as reducing nocturnal hypoglycemia during the overnight period in children and adolescents with type 1 diabetes in a diabetes camp setting.
Author Ly, Trang T.
Benassi, Kari
Kovatchev, Boris P.
Breton, Marc D.
Keith-Hynes, Patrick
Buckingham, Bruce A.
Mize, Benton
Clinton, Paula
Chernavvsky, Daniel
Wilson, Darrell M.
Place, Jéróme
De Salvo, Daniel
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  givenname: Trang T.
  surname: Ly
  fullname: Ly, Trang T.
  organization: Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, School of Paediatrics and Child Health, The University of Western Australia, Perth, Western Australia, Australia
– sequence: 2
  givenname: Marc D.
  surname: Breton
  fullname: Breton, Marc D.
  organization: Center for Diabetes Technology, University of Virginia, Charlottesville, VA
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  givenname: Patrick
  surname: Keith-Hynes
  fullname: Keith-Hynes, Patrick
  organization: Center for Diabetes Technology, University of Virginia, Charlottesville, VA
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  surname: De Salvo
  fullname: De Salvo, Daniel
  organization: Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
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  organization: Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
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  surname: Benassi
  fullname: Benassi, Kari
  organization: Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
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  fullname: Mize, Benton
  organization: Center for Diabetes Technology, University of Virginia, Charlottesville, VA
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  surname: Chernavvsky
  fullname: Chernavvsky, Daniel
  organization: Center for Diabetes Technology, University of Virginia, Charlottesville, VA
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  givenname: Jéróme
  surname: Place
  fullname: Place, Jéróme
  organization: Department of Endocrinology, Diabetes and Nutrition, Montpellier University Hospital, Montpellier, France
– sequence: 10
  givenname: Darrell M.
  surname: Wilson
  fullname: Wilson, Darrell M.
  organization: Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
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  givenname: Bruce A.
  surname: Buckingham
  fullname: Buckingham, Bruce A.
  organization: Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
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ContentType Journal Article
Copyright 2015 INIST-CNRS
2014 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered.
Copyright American Diabetes Association Aug 2014
2014 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. 2014
Copyright_xml – notice: 2015 INIST-CNRS
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– notice: Copyright American Diabetes Association Aug 2014
– notice: 2014 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. 2014
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Issue 8
Keywords Endocrinopathy
Human
Immunopathology
Nutrition
Toxicity
Autoimmune disease
Metabolic diseases
Glucose
Surveillance
Type 1 diabetes
Adolescent
Safety
Therapeutic camp
Child
Endocrinology
Language English
License CC BY 4.0
2014 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered.
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PublicationCentury 2000
PublicationDate 2014-08-01
PublicationDateYYYYMMDD 2014-08-01
PublicationDate_xml – month: 08
  year: 2014
  text: 2014-08-01
  day: 01
PublicationDecade 2010
PublicationPlace Alexandria, VA
PublicationPlace_xml – name: Alexandria, VA
– name: United States
– name: Alexandria
PublicationTitle Diabetes care
PublicationTitleAlternate Diabetes Care
PublicationYear 2014
Publisher American Diabetes Association
Publisher_xml – name: American Diabetes Association
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– reference: 22688340 - Diabetes. 2012 Sep;61(9):2230-7
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– reference: 15212060 - J Pediatr. 2004 Jun;144(6):834
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– reference: 21129332 - J Diabetes Sci Technol. 2010 Nov;4(6):1374-81
– reference: 23445093 - N Engl J Med. 2013 Feb 28;368(9):824-33
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Snippet To determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and adolescents...
OBJECTIVE To determine the safety and efficacy of an automated unified safety system (USS) in providing overnight closed-loop (OCL) control in children and...
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StartPage 2310
SubjectTerms Adolescent
Adult
Algorithms
Automation
Biological and medical sciences
Biosensing Techniques - instrumentation
Blood Glucose - drug effects
Blood Glucose - metabolism
Blood Glucose Self-Monitoring - instrumentation
Camping
Child
Children & youth
Circadian Rhythm
Diabetes
Diabetes Mellitus, Type 1 - blood
Diabetes Mellitus, Type 1 - drug therapy
Diabetes Mellitus, Type 1 - epidemiology
Diabetes. Impaired glucose tolerance
Emerging Technologies and Therapeutics
Endocrine pancreas. Apud cells (diseases)
Endocrinopathies
Etiopathogenesis. Screening. Investigations. Target tissue resistance
Female
General aspects
Glucose
Humans
Hypoglycemic Agents - administration & dosage
Hypoglycemic Agents - adverse effects
Insulin - administration & dosage
Insulin - adverse effects
Insulin Infusion Systems - adverse effects
Intention to Treat Analysis
Male
Median
Medical sciences
Metabolic diseases
Protocol
Teenagers
Young Adult
Title Overnight Glucose Control With an Automated, Unified Safety System in Children and Adolescents With Type 1 Diabetes at Diabetes Camp
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Volume 37
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