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Type 1 DiabetesRocketAPNCT04545567

Fully Automated Closed Loop Control in Adolescents With Type 1 Diabetes

A study testing RocketAP and USS Virginia in people with Type 1 Diabetes, run by University of Virginia at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The study team will be comparing two investigational Artificial Pancreas (AP) systems that the UVA Center for Diabetes Technology has developed. An artificial pancreas system delivers insulin automatically based on a blood glucose level that is provided from a continuous glucose monitor (CGM). Read more about this study

Who is it for?
Ages 12 to 25 years
Conditions the study is for
Type 1 Diabetes
What is being tested?
RocketAP and USS Virginia
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
21 participants
Where
1 siteUnited States
Study dates
16 Dec 2020to 21 Jan 2021
Phase
Interventional
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 12 to 25 years
  • All sexes
  • No healthy volunteers
  • Child, Adult

Who may be able to join

  • Age ≥12.0 and ≤25 years old at time of consent
  • Clinical diagnosis, based on investigator assessment, of type 1 diabetes for at least one year
  • Currently using insulin for at least six months
  • Currently using insulin pump for at least three months
  • Using insulin parameters such as carbohydrate ratio and correction factors consistently on their pump in order to dose insulin for meals or corrections
  • Access to internet and willingness to upload data during the study as needed
Show all 16Show fewer
  • For females, not currently known to be pregnant or breastfeeding
  • If female and sexually active, must agree to use a form of contraception to prevent pregnancy while a participant in the study. A negative serum or urine pregnancy test will be required for all females of childbearing potential. Participants who become pregnant will be discontinued from the study. Also, participants who during the study develop and express the intention to become pregnant within the timespan of the study will be discontinued.
  • Willingness to suspend use of any personal CGM for the duration of the clinical trial once the study CGM is in use
  • Willingness to use the UVa artificial pancreas system throughout study sessions.
  • Willingness to switch to lispro (Humalog) or aspart (Novolog) if not using already, and to use no other insulin besides lispro (Humalog) or aspart (Novolog) during the study
  • Total daily insulin dose (TDD) at least 10 U/day and not more than 100 U/d
  • Willingness not to start any new non-insulin glucose-lowering agent during the course of the trial (including metformin, GLP-1 agonists, pramlintide, DPP-4 inhibitors, biguanides, sulfonylureas and naturaceuticals)
  • Willingness to eat at least 1 g/kg of carbohydrate per day during the camp/hotel admission
  • Willingness to reschedule Study Dinner Sessions if placed on oral steroids
  • An understanding and willingness to follow the protocol and signed informed consent

Who cannot join

  • History of diabetic ketoacidosis (DKA) in the 12 months prior to enrollment
  • Severe hypoglycemia resulting in seizure or loss of consciousness in the 12 months prior to enrollment
  • Pregnancy or intent to become pregnant during the trial
  • Currently being treated for a seizure disorder
  • Planned surgery during study duration
  • Treatment with any non-insulin glucose-lowering agent (including metformin, GLP-1 agonists, pramlintide, DPP-4 inhibitors, SGLT-2 inhibitors, biguanides, sulfonylureas and naturaceuticals)
  • A known medical condition that in the judgment of the investigator might interfere with the completion of the protocol.
  • Use of an automated insulin delivery mechanism that is not downloadable by the subject or study team

Trial locations and contacts

1 site in 1 country.

United States1 site
  • University of Virginia Center for Diabetes Technology

    Charlottesville, Virginia, 22904

Other trials in United States

About this study

Official title: Fully Automated Closed Loop Control in Adolescents With Type 1 Diabetes (Rocket AP)

The study team will be comparing two investigational Artificial Pancreas (AP) systems that the UVA Center for Diabetes Technology has developed. An artificial pancreas system delivers insulin automatically based on a blood glucose level that is provided from a continuous glucose monitor (CGM).

Read the detailed description

Maintaining blood glucose (BG) control among adolescents with Type 1 diabetes (T1D) is arguably the greatest challenge in the entire field of T1D. One reason for this poor control relates to missed meal boluses, which affects 65% of adolescents at least once weekly, with 38% missing at least 15% of their boluses. Adolescents who miss four boluses weekly experience an increase of 1% in their HbA1c. While the advent of the artificial pancreas (AP) offers promise of safe reductions in HbA1c, the study team previously found that the AP only partly compensates for missed prandial insulin -demonstrating that some form of meal announcement is necessary for good BG control, even with an AP. One way to automate this process is by sharing the prandial dosing responsibilities between an automated insulin priming (based on continuous glucose monitor condition predictive of a safe situation for such insulin dosing) and a closed loop controller capable of reconstructing (estimating) the prevailing glucose rate of appearance from an unannounced meal. The study team has developed such an insulin priming schema and integrated it into a new version of the robust Model Predictive Controller University of Virginia AP system (called the RocketAP).

In the current study, the investigators are testing this new AP system in two configurations: hybrid and fully automated, among up to 20 adolescents. The primary outcome will be one of efficacy in assessing how well the new system controls post-prandial BG in the absence of carbohydrate (CHO) announcement as compared to the same situation but using the Control-IQ closed loop algorithm, also designed at UVa and using the same modular architecture and safety system, but without insulin priming and with a less advanced model-based controller. Further comparisons will be made to BG control on RocketAP with CHO announcement and on Control-IQ with CHO announcement. Adolescents will be started on the respective University of Virginia AP systems (RocketAP and Control-IQ in random order, both implemented on the DiAs platform, MAF 2109) and followed over the course of two dinners on each of the two platforms: a dinner where CHO is announced as normal and the 2nd where no announcement is made.

The study team hypothesize that performances of RocketAP in fully automated mode will lie in between Hybrid and Fully Automated Control-IQ. In time, this may provide an opportunity to improve BG control among adolescents who miss meal announcement.

Conditions
Type 1 Diabetes
Being tested
RocketAP, USS Virginia
Keywords
Artificial Pancreas (AP), Continuous Glucose Monitor (CGM), Insulin Pump, Closed Loop Control
Medical subject headings
Diabetes Mellitus, Type 1

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • RocketAPDevice

    Artificial pancreas system which is designed to be able to identify when you have eaten and provide insulin for this meal

  • USS VirginiaDevice

    Artificial pancreas system which responds to glucose fluctuations by modulating insulin delivery but does not specifically detect meal ingestion

Study groups in NCT04545567
Study groupRoleWhat they receive
RocketAPExperimentalAdolescents will be assessed for a 48-70 hour period on the Rocket AP. This time will include two dinner times, one with and one without announcement of carbohydrate content. This is a cross-over study, so all participants will also be tested on the USS Virginia system under the same conditions.
Receives: Device: RocketAP
USS VirginiaActive comparatorAdolescents will be assessed for a 48-70 hour period on the USS Virginia system. This time will include two dinner times, one with and one without announcement of carbohydrate content. This is a cross-over study, so all participants will also be tested on the Rocket AP system under the same conditions.
Receives: Device: USS Virginia

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Percentage of Time From Dinner Time Until Midnight With Blood Glucose in Range 70-180 mg/dL in the Unannounced Meal

    Percentage of time from dinner time until midnight with blood glucose in range 70-180 mg/dL in the unannounced meal

    Measured: 6 hours

Secondary outcomes (19)
  1. Number of Hypoglycemia Events From Dinner Time Until Midnight

    Number of hypoglycemia events from dinner time until midnight

    Measured: 6 hours

  2. Percentage of Time From Dinner Time Until Midnight With Blood Glucose in Range < 70 mg/dL

    Percentage of Time From Dinner Time Until Midnight With Blood Glucose in Range < 70 mg/dL

    Measured: 6 hours

  3. Percentage of Time From Dinner Time Until Midnight With Blood Glucose in Range >180 mg/dL

    Percentage of Time From Dinner Time Until Midnight With Blood Glucose in Range >180 mg/dL

    Measured: 6 hours

  4. Percentage of Time From Dinner Time Until Midnight With Blood Glucose in Range >250 mg/dL

    Percentage of Time From Dinner Time Until Midnight With Blood Glucose in Range >250 mg/dL

    Measured: 6 hours

  5. Units of Insulin Injected From Dinner Time Until Midnight

    Units of insulin injected from dinner time until midnight

    Measured: 6 hours

  6. The Blood Glucose Area Under the Curve (AUC) From Dinner Until Midnight, Accounting for the Initial Blood Glucose Value

    The blood glucose area under the curve (AUC) from dinner until midnight, accounting for the initial blood glucose value.

    Measured: 6 hours

  7. Percentage of Time From Dinner Time Until Dinner Time + 12h With Blood Glucose in Range 70-180 mg/dL

    Percentage of time from dinner time until dinner time + 12h with blood glucose in range 70-180 mg/dL

    Measured: 12 hours

  8. Number of Hypoglycemia Events From Dinner Time Until Dinner Time + 12h

    Number of hypoglycemia events from dinner Time until dinner time + 12h

    Measured: 12 hours

  9. Percentage of Time From Dinner Time Until Dinner Time + 12h With Blood Glucose in Range <70 mg/dL

    Percentage of time from dinner time until dinner time + 12h with blood Glucose in range <70 mg/dL

    Measured: 12 hours

  10. Percentage of Time From Dinner Time Until Dinner Time + 12h With Blood Glucose >180 mg/dL

    Percentage of Time From Dinner Time Until Dinner Time + 12h With Blood Glucose >180 mg/dL

    Measured: 12 hours

  11. Percentage of Time From Dinner Time Until Dinner Time + 12h With Blood Glucose >250 mg/dL

    Percentage of Time From Dinner Time Until Dinner Time + 12h With Blood Glucose >250 mg/dL

    Measured: 12 hours

  12. Units of Insulin Injected From Dinner Time Until Dinner Time + 12h

    Units of insulin injected from dinner time until dinner time + 12h

    Measured: 12 hours

  13. The Blood Glucose Area Under the Curve (AUC) From Dinner Until Dinner + 12h, Accounting for the Initial Blood Glucose Value

    The Blood Glucose Area Under the Curve (AUC) From Dinner Until dinner + 12h, Accounting for the Initial Blood Glucose Value

    Measured: 12 hours

  14. Percentage of Time Outside the Dinner Sessions With Blood Glucose in Range 70-180 mg/dL

    Percentage of Time outside the dinner sessions With Blood Glucose in Range 70-180 mg/dL

    Measured: 36 hours

  15. Number of Hypoglycemia Events Outside of the Study Dinner Sessions

    Number of hypoglycemia events outside of the Study Dinner Sessions

    Measured: 36 hours

  16. Percentage of Time Outside of the Study Dinner Sessions With Blood Glucose <70 mg/dL

    Percentage of Time outside of the Study Dinner Sessions with Blood Glucose <70 mg/dL

    Measured: 36 hours

  17. Percent of Time Outside of the Study Dinner Sessions With Blood Glucose >180 mg/dL

    Percent of Time Outside of the Study Dinner Sessions with Blood Glucose >180 mg/dL

    Measured: 36 hours

  18. Percent Time Outside of the Study Dinner Sessions With Blood Glucose >250 mg/dL

    Percent Time Outside of the Study Dinner Sessions with Blood Glucose >250 mg/dL

    Measured: 36 hours

  19. Units of Insulin Injected Outside of the Study Dinner Sessions

    Units of insulin injected outside of the Study Dinner Sessions

    Measured: 36 hours

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Sep 2020
  2. Study start16 Dec 2020
  3. Primary completion18 Jan 2021
  4. Study completion21 Jan 2021

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Other
Allocation
Randomised
Intervention model
Crossover
Model description
A randomized cross-over trial assessing glycemic responses to two different approaches to insulin dosing for carbohydrate ingestion (announced vs. unannounced), with two different AP systems (RocketAP vs. USS Virginia, aka Control-IQ, in random order)
Masking
None (open label)
Enrolment
21 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04545567
Sponsor's protocol ID
200235
Acronym
RocketAP
Status last verified
Mar 2022
First submitted
3 Sep 2020
Last updated
20 Apr 2022
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
Yes
Individual data sharing
Yes: Pending

Publications

  • Garcia-Tirado J, Diaz JL, Esquivel-Zuniga R, Koravi CLK, Corbett JP, Dawson M, Wakeman C, Barnett CL, Oliveri MC, Myers H, Krauthause K, Breton MD, DeBoer MD. Advanced Closed-Loop Control System Improves Postprandial Glycemic Control Compared With a Hybrid Closed-Loop System Following Unannounced Meal. Diabetes Care. 2021 Aug 15:dc210932. doi: 10.2337/dc21-0932. Online ahead of print.

    PubMed 34400480

Questions about this trial

What is this clinical trial studying?

A study testing RocketAP and USS Virginia in people with Type 1 Diabetes, run by University of Virginia at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 16 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 20 Apr 2022. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 31 Mar 2022). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Percentage of Time From Dinner Time Until Midnight With Blood Glucose in Range 70-180 mg/dL in the Unannounced Meal (time frame: 6 hours). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04545567, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Apr 2022.

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RocketAP Clinical Trial NCT04545567 | AzTrials