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Feasibility Evaluation of an Artificial Pancreas With Glucose Prediction Trust Index

10. Juli 2018 aktualisiert von: Jordan Pinsker, Sansum Diabetes Research Institute

Feasibility Evaluation of an Artificial Pancreas With an Enhanced Model Predictive Control (eMPC) Controller and a Health Monitoring System (HMS) With a Glucose Prediction Trust Index

The purpose of this pilot study is to establish that closed-loop insulin delivery with a target enchanted model predictive control (eMPC)/Health Monitoring System (HMS) algorithms with a trust index of the predicted glucose value is safe and effective, to analyze and learn to improve upon the accuracy of the predicted glucose values, and to collect efficacy data to inform a future larger study.

Studienübersicht

Status

Abgeschlossen

Intervention / Behandlung

Detaillierte Beschreibung

This is a feasibility study of an artificial pancreas (AP) system with our previously validated target eMPC and HMS algorithms, with the addition of a trust index of the predicted glucose value integrated into the portable Artificial Pancreas System (pAPS). The system will be evaluated on up to 20 subjects, with the goal of 10 subjects completing a 48-hour closed-loop session at one clinical site (William Sansum Diabetes Center). During the session subjects will bolus for all meals and snacks and perform a 45-minute walking session.

The purpose of this pilot study is to establish that closed-loop insulin delivery with a target enchanted model predictive control (eMPC)/Health Monitoring System (HMS) algorithms with a trust index of the predicted glucose value is safe and effective, to analyze and learn to improve upon the accuracy of the predicted glucose values, and to collect efficacy data to inform a future larger study.

Studientyp

Interventionell

Einschreibung (Tatsächlich)

15

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

    • California
      • Santa Barbara, California, Vereinigte Staaten, 93105
        • William Sansum Diabetes Center

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 75 Jahre (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • Age ≥ 18 and ≤ 75 years at the time of screening.
  • Clinical diagnosis of type 1 diabetes for at least one year.
  • Has been using an insulin pump for at least 6 months at the time of screening.
  • HbA1c < 10%, as performed by point of care or central laboratory testing. A1c will be assessed at the screening visit, or if already completed within 2 months of the screening visit, the prior lab value may be used in lieu of repeating this assessment.
  • Serum creatinine of < 2.0 mg/dL. Serum creatinine will be assessed at the screening visit, or if already completed within 2 months of the screening visit, the prior lab value may be used in lieu of repeating this assessment.
  • Bolus for all meals and snacks that contain ≥ 5 grams of carbohydrate.
  • Willing to perform at least 7 fingerstick blood glucose tests a day.
  • Willing to refrain from taking acetaminophen products for the duration of the clinical trial. If acetaminophen is taken, subject is to avoid making any insulin dosing decisions based on CGM for at least 12 hours.
  • Willing to abide by the study protocol and use study-provided devices, including the Omnipod, Dexcom CGM, glucometer, ketone meter and pAPS tablet.

Exclusion Criteria:

  • Pregnancy
  • One or more episodes of hypoglycemia requiring an emergency room visit or hospitalization in the past 6 months.
  • One or more episodes of hyperglycemia requiring an emergency room visit or hospitalization in the past 6 months.
  • Known unstable cardiac disease or untreated cardiac disease, as revealed by history or physical examination.
  • Dermatological conditions that would preclude wearing a CGM sensor or Pod.
  • One or more seizures in the past year.
  • Screening A1c ≥ 10% or serum creatinine ≥ 2.0 mg/dL.
  • Any condition that could interfere with participating in the trial, based on investigator judgment.
  • Concurrent use of any non-insulin glucose-lowering agent (including GLP-1 agonists, Symlin, DPP-4 inhibitors, SGLT-2 inhibitors, biguanides, sulfonylureas and naturaceuticals), defined as using any of these medications within 30 days of the screening visit or during the study.
  • Participation in another pharmaceutical or device trial at the time of enrollment or during the study.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: N / A
  • Interventionsmodell: Einzelgruppenzuweisung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Artificial Pancreas
The artificial pancreas device will employ its enhanced Model Predictive Control (MPC) algorithm with a target glucose level of 110 mg/dL with a trust index for MPC-predicted glucose values, weighing future glucose predictions and only acting on predictions with higher weight in the trust index. The Health Monitoring System algorithm uses the same CGM data as the MPC control algorithm but utilizes a separate algorithm for trending and predictions of future glucose values. Using a redundant and independent algorithm is an important safety feature of the overall AP device.
Artificial Pancreas Device

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Percent time within the target glucose range of 70-180 mg/dl overall as assessed by continuous glucose monitoring (CGM).
Zeitfenster: 48 hours
The primary endpoint for this pilot study will be time within the target glucose range of 70-180 mg/dl overall as assessed by continuous glucose monitoring (CGM), during closed-loop use, determining if the combination of eMPC and the assessment of trust index can provide safe and effective glucose control.
48 hours

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Assessment of the trust index predictions vs. standard eMPC glucose predictions.
Zeitfenster: 48 hours
During closed-loop use, assessment of the trust index predictions vs. standard eMPC glucose predictions (frequency of moving away from nominal weights of predicted glucose).
48 hours
Frequency of hypoglycemia during closed-loop use.
Zeitfenster: 48 hours
Frequency of hypoglycemia during closed-loop use, defined as percent time glucose is below predefined thresholds of 70 mg/dl, 60 mg/dl and 50 mg/dL.
48 hours
Frequency of hyperglycemia during closed-loop use.
Zeitfenster: 48 hours
Frequency of hyperglycemia during closed-loop use, defined as percent time glucose is above predefined thresholds of 180 mg/dl, 250 mg/dl, and 300 mg/dL.
48 hours
Percent time within the target glucose range of 70-140 mg/dl during closed-loop use.
Zeitfenster: 48 hours
Percent time within the target glucose range of 70-140 mg/dl overall as assessed by continuous glucose monitoring (CGM), during closed-loop use.
48 hours
Percent time glucose is within range 70-150 mg/dl postprandial within 5 hours following meals, during closed-loop use.
Zeitfenster: 48 hours
Percent time glucose is within range 70-150 mg/dl postprandial within 5 hours following meals, during closed-loop use.
48 hours
Standard Deviation and Coefficient of Variation of glucose values
Zeitfenster: 48 hours
To measure glycemic variability, the standard deviation and coefficient of variation of glucose values (as measured by continuous glucose monitoring) will be determined during the 48 hours of closed-loop use.
48 hours
Markers of hypo- and hyperglycemia
Zeitfenster: 48 hours
Markers of hypo- and hyperglycemia, to include LBGI (Low blood glucose index) and HBGI (High blood glucose index), during closed-loop use.
48 hours
Insulin Doses Given
Zeitfenster: 48 hours
Change in total daily doses and post prandial insulin doses given during the 48 hours of closed-loop use.
48 hours
Number of treatments given for hypoglycemia (defined as carbohydrates given for treatment of a documented or suspected low blood sugar), during the 48 hours of closed-loop use.
Zeitfenster: 48 hours
Treatments for hypoglycemia given during the 48 hours of closed-loop use. Hypoglycemia treatments may be given in response to alerts from the HMS, if blood glucose < 70 mg/dL, or at the request of the subject or investigator.
48 hours
Number of alerts given by the HMS to prevent hypoglycemia
Zeitfenster: 48 hours
Number of alerts given by the HMS to prevent hypoglycemia during closed-loop use.
48 hours
Failure analysis of the devices/connectivity issues that may occur (# disconnects and device restarts).
Zeitfenster: 48 hours
Failure analysis of the devices/connectivity issues that may occur during closed-loop use. This includes number of CGM communication losses with 3 or more missed points, and number of times the entire system required a restart.
48 hours

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Mitarbeiter

Ermittler

  • Hauptermittler: Eyal Dassau, PhD, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University
  • Hauptermittler: Francis J Doyle III, PhD, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University
  • Hauptermittler: Alejandro Leguna, PhD, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

20. März 2017

Primärer Abschluss (Tatsächlich)

20. Dezember 2017

Studienabschluss (Tatsächlich)

20. Dezember 2017

Studienanmeldedaten

Zuerst eingereicht

15. März 2017

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

20. März 2017

Zuerst gepostet (Tatsächlich)

27. März 2017

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

12. Juli 2018

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

10. Juli 2018

Zuletzt verifiziert

1. Juli 2018

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Ja

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .

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