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- Klinische Studie NCT00884611
Development of Algorithms for a Hypoglycemic Prevention Alarm: Closed Loop Study
Development of Algorithms for a Hypoglycemic Prevention Alarm
This research study, Development of Algorithms for a Hypoglycemic Prevention Alarm, is being conducted at Stanford University Medical Center and the University of Colorado Barbara Davis Center. It is paid for by the Juvenile Diabetes Research Foundation.
The purpose of doing this research study is to understand the best way to stop an insulin infusion pump from delivering insulin to prevent a subject from having hypoglycemia. Nocturnal hypoglycemia is a common problem with type 1 diabetes. This is a pilot study to evaluate the safety of a system consisting of an insulin pump and continuous glucose monitor communicating wirelessly with a bedside computer running an algorithm that temporarily suspends insulin delivery when hypoglycemia is predicted in a home setting.
Studienübersicht
Status
Bedingungen
Intervention / Behandlung
Detaillierte Beschreibung
After the run-in phase, there is a 21-night trial in which each night is randomly assigned 2:1 to have either the predictive low-glucose suspend (PLGS) system active (intervention night) or inactive (control night).
Three predictive algorithm versions were studied sequentially during the study.
Studientyp
Einschreibung (Tatsächlich)
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
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California
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Stanford, California, Vereinigte Staaten, 94305
- Stanford University School of Medicine
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Colorado
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Aurora, Colorado, Vereinigte Staaten, 80045
- Barbara Davis Center for Childhood Diabetes, University of Colorado
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Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
- Age 18 years or older,
- Type 1 diabetes for at least 1 year
- Current user of the MiniMed Paradigm Real-Time Revel system and Sof-sensor glucose sensor
- Hemoglobin A1c level of < 8.0%,
- Home computer with access to the Internet,
- At least one CGMglucose value < 70 mg/dL during the most recent 15 nights of CGM glucose data.
- Not pregnant or planning to become pregnant
Exclusion Criteria:
The exclusion criteria for this study is the following:
- The presence of a significant medical disorder that in the judgment of the investigator will affect the wearing of the sensors or the completion of any aspect of the protocol
The presence of any of the following diseases:
- Asthma if treated with systemic or inhaled corticosteroids in the last 6 months
- Cystic fibrosis
- Angina (recurrent heart pain)
- Past heart attack or coronary artery (heart vessel) disease
- Past stroke or impairment of blood flow to the brain
- Other major illness that in the judgment of the investigator might interfere with the completion of the protocol Adequately treated thyroid disease and celiac disease do not exclude subjects from enrollment
- Inpatient psychiatric treatment in the past 6 months for either the subject or the subject's primary care giver (i.e., parent or guardian)
- Current use of oral/inhaled glucocorticoids or other medications, which in the judgment of the investigator would be a contraindication to participation in the study
- Severe hypoglycemic event, as described as a seizure, loss of consciousness, severe neurological impairment, or neurological impairment suggestive of hypoglycemia and requiring an emergency department visit or hospitalization within 18 months of enrollment.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Behandlung
- Zuteilung: N / A
- Interventionsmodell: Einzelgruppenzuweisung
- Maskierung: Keine (Offenes Etikett)
Waffen und Interventionen
Teilnehmergruppe / Arm |
Intervention / Behandlung |
|---|---|
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Experimental: Predictive Low Glucose Suspend
The pump suspension system consists of the Revel CGM device communicating with a laptop computer that contains the hypoglycemia prediction algorithm.
During the 21 night study period, the laptop is placed at the bedside and turned on by the participant at bedtime and off on arising in the morning.The laptop contains a randomization schedule (2:1) that indicats whether the hypoglycemia prediction algorithm will be in operation that night (Predictive Low Glucose Suspend Algorithm ON) or will not be activated (Predictive Low Glucose Suspend Algorithm OFF), to which the participant is blinded.
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The algorithm uses a Kalman filter-based model to predict whether the sensor glucose level will fall below 80 mg/dL within a given time period and suspends the insulin pump if this event is predicted.
Andere Namen:
Andere Namen:
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Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Percentage of Nights With CGM (Continuous Glucose Monitor) Sensor Values < 60 mg/dL
Zeitfenster: 21 days
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Nights with CGM sensor values < 60 mg/dL were considered to be undesirable.
A Kalman filter-based model algorithm predicted whether the sensor glucose level would fall below 80 mg/dL and would suspend insulin delivery as needed.
Participants may have received treatment using one or more of the following algorithms: Algorithm 1 had a hypoglycaemic prediction horizon of 70 minutes; algorithm 2: 50 minutes; algorithm 3: 30 minutes.
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21 days
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Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Percentage of Nights With CGM Values >180 mg/dL
Zeitfenster: 21 days
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Nights with CGM sensor values >180 mg/dL were considered to be undesirable.
Participants may have received treatment using one or more of the following algorithms: Algorithm 1 had a hypoglycaemic prediction horizon of 70 minutes; algorithm 2: 50 minutes; algorithm 3: 30 minutes.
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21 days
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Mean Morning Blood Glucose (BG)
Zeitfenster: 21 days
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Desirable glucose level was 70-180 mg/mL.
Average of all morning BG data is presented.
Participants may have received treatment using one or more of the following algorithms: Algorithm 1 had a hypoglycaemic prediction horizon of 70 minutes; algorithm 2: 50 minutes; algorithm 3: 30 minutes.
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21 days
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Mitarbeiter und Ermittler
Sponsor
Mitarbeiter
Publikationen und hilfreiche Links
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn
Primärer Abschluss (Tatsächlich)
Studienabschluss (Tatsächlich)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
- SU-10162008-1321
- Stanford eprotocol # 6789 (Andere Kennung: Stanford University)
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