Control-IQ Technology 2.0 Adult and Adolescent Feasibility Study

May 5, 2026 updated by: Tandem Diabetes Care, Inc.

A Control-IQ Technology 2.0 Feasibility Study in Adult and Adolescent Subjects

The purpose of this study is to obtain preliminary safety and performance data on planned improvements to Control-IQ technology.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This feasibility study is a prospective, single arm, single center study with a run-in phase, followed by a 48-hour supervised phase, followed by a 4-week at home study with sequential interventions (new feature use). Approximately 30 subjects, both male and female, aged 14 and up, will participate in the study, using new features each week with the t:slim X2 insulin pump with Control-IQ technology.

The first 5 subjects in the study will complete a 48 hour session with multiple challenges during use of Control-IQ technology 2.0, before moving on the outpatient portion of the trial.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
66

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Virginia
      • Charlottesville, Virginia, United States, 22904
        • University of Virginia

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

10 years and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Adult and adolescent male and female subjects >age 14 years
  • Clinical diagnosis of Type 1 diabetes for at least one year
  • Experienced Control-IQ technology user for ≥3 months.
  • Use of Control-IQ technology in closed-loop at least 80% of the 2-week time period before screening.
  • Not pregnant or planning a pregnancy during the time period of the study
  • Using only Humalog U-100 or Novolog U-100 insulin
  • ICR and ISF optimized per investigator judgement
  • CGM time in range (70-180 mg/dL) at least 50% on Control-IQ technology
  • Has current glucagon product to treat severe hypoglycemia (injectable or nasal) at home (will provide prescription if they do not have one)

  • Willing to:

    1. Share Dexcom G6 CGM data with study staff and Tandem
    2. Share t:connect data with Tandem
    3. Eat meals with known carbohydrate amounts
    4. Take meal boluses as directed (use of different options as scheduled and instructed)
    5. Follow study Glycemic Treatment Guidelines for hypo and hyperglycemia
    6. Keep food and exercise diary
    7. Set accurate sleep schedule on pump
    8. Exercise while using exercise activity in Control-IQ technology at least twice weekly
    9. Complete questionnaires before and after using investigational device
    10. Sign an informed consent form
  • Willingness to use the Dexcom G6 app on their personal phone throughout the study, and share real time CGM information with a local contact and study staff
  • Availability of a local contact who has access to the study participant, knows their whereabouts, and agrees to be promptly available if contacted by study staff. If the subject lives alone, the local contact must live within 30 minutes and have access to the subject overnight.

Exclusion Criteria:

  • Diabetic ketoacidosis (DKA) in the past 6 months
  • Severe hypoglycemia (needing assistance) in the past 6 months
  • Inpatient psychiatric treatment in the past 6 months
  • History of drug abuse (defined as any illicit drug use) or history of alcohol abuse prior to screening or is unwilling to agree to abstain from illicit drugs throughout the study
  • History of heart, lung or kidney disease determined by the investigator to interfere with the study
  • Use of glucocorticoids, beta blockers or other medications determined by investigator to interfere with the study
  • Use of long-acting insulin or any non-insulin glucose lowering agents (i.e. SGLT-2 inhibitor) other than metformin
  • Use of Afrezza during the study period
  • Febrile illness within 3 days of the start of the study
  • Subject is pregnant or lactating or intending to become pregnant before or during participation in this study
  • For subjects >50 years old or with diabetes duration >20 years who will be exercising as part of the 48 hour study, abnormal electrocardiogram consistent with increased risk of arrhythmia, ischemia, or prolonged QTc interval (> 450 ms)
  • Significant chronic kidney disease (eGFR < 60) or hemodialysis
  • Significant liver disease
  • History of adrenal insufficiency
  • History of abnormal TSH consistent with hypothyroidism or hyperthyroidism that is not appropriately treated

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Control-IQ 2.0 technology 2.0 on the t:slim X2 insulin pump

After a run-in week, each subject will use different combinations of new features of the system each week, in random order, for 4 weeks, using the t:slim X2 insulin pump with Control-IQ technology 2.0.

The first 5 subjects participated in a 48-hour supervised hotel phase before continuing in the outpatient setting.
Device: Control-IQ technology 2.0
All subjects wearing the t:slim X2 insulin pump with Control-IQ technology 2.0, and wearing the Dexcom G6 sensor

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Overall Percent Time Less Than 54 mg/dL
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
CGM overall percent time less than 54 mg/dL, with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks
Severe Hypoglycemia
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
Number of severe hypoglycemia events (with cognitive impairment such that assistance of another individual is needed for treatment), with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks
Diabetic Ketoacidosis
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
Number of Diabetic Ketoacidosis events with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Percent Time <70 mg/dL
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
CGM percent time <70 mg/dL, with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks
Percent Time 70-140 mg/dL
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
CGM percent time 70-140 mg/dL, with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks
Percent Time 70-180 mg/dL
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
CGM percent time 70-180 mg/dL, with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks
Percent Time >180 mg/dL
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
CGM percent time >180 mg/dL, with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks
Percent Time >250 mg/dL
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
CGM percent time >250 mg/dL, with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks
Median of Mean Glucose (mg/dL)
Time Frame: Data collected over 1 week for each intervention, up to 5 weeks
Median of individual participants CGM Mean Glucose values (mg/dL), with different feature use of the pump each week.
Data collected over 1 week for each intervention, up to 5 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Tandem Diabetes Care, Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: Jordan E Pinsker, MD, Tandem Diabetes Care, Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 19, 2021

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 20, 2021

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 20, 2021

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 13, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 13, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 20, 2021

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 1, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 5, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • G210146

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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