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NCT Number: NCT07386340

Gemini Study: A Prospective, Multicenter Evaluation of Performance and Safety of the Eversense Gemini System With Flash Glucose Measurement Feature

A prospective, multicenter evaluation of performance and safety of the Eversense Gemini System with flash glucose measurement feature. The purpose of this clinical investigation is to evaluate the accuracy of the Gemini System with new technological flash glucose monitoring (FGM) feature enhancements compared to reference glucose measurements and the Eversense 365 CGM System. The investigation will also evaluate safety of the Gemini System usage.

Recruiting

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Headlands Research - AMCR Institute

Escondido, California, 92025, United States

Location status: Recruiting

Location contact

Jenine Yager Stone, PhD, MSN, FNP-C

CONTACT

[email protected]

760-466-1520

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Subjects meeting all of the following inclusion criteria will be included in this study:

  • Subjects ≥18 years of age
  • Clinically confirmed diagnosis of diabetes mellitus for ≥1 year
  • Subject has signed an informed consent form (ICF) and is willing to comply with protocol requirements

Exclusion criteria

Subjects meeting any of the following exclusion criteria at the time of screening will be excluded from this study:

  • History of severe hypoglycemia in the previous 6 months. Severe hypoglycemia is defined as hypoglycemia resulting in loss of consciousness or seizure.
  • History of diabetic ketoacidosis requiring emergency room visit or hospitalization in the previous 6 months.
  • Subjects with gastroparesis.
  • Female subjects of childbearing capacity (defined as of childbearing age and as not surgically sterile or not menopausal for ≥ 1 year) who are lactating or pregnant, intending to become pregnant, or not practicing birth control during the course of the study.
  • A condition preventing or complicating the placement, operation, or removal of the sensor or wearing of transmitter, including upper extremity deformities or skin condition.
  • Symptomatic coronary artery disease; unstable angina; myocardial infarction, transient ischemic attack or stroke in the past 6 months; uncontrolled hypertension (systolic>160 mm Hg or diastolic >100 mm Hg at time of screening); current congestive heart failure; history of cardiac arrhythmia (benign PACs and PVCs allowed). Subjects with asymptomatic coronary artery disease (e.g., CABG, stent placement or angioplasty) may participate if negative stress test within 1 year prior to screening and written clearance from Cardiologist documented.
  • Hematocrit <38% or >60% at screening
  • History of hepatitis B, hepatitis C, or HIV
  • Current treatment for a seizure disorder unless written clearance by neurologist to participate in study.
  • History of adrenal insufficiency
  • Currently receiving (or likely to need during the study period): immunosuppressant therapy; chemotherapy; anticoagulant/antithrombotic therapy (excluding aspirin); topical glucocorticoids over sensor site only; antibiotic for chronic infection (e.g., osteomyelitis, endocarditis)
  • A condition requiring or likely to require magnetic resonance imaging (MRI)
  • Known topical or local anesthetic allergy
  • Known allergy to glucocorticoids
  • Any condition that in the investigator's opinion would make the subject unable to complete the study or would make it not in the subject's best interest to participate in the study. Conditions include but are not limited to psychiatric conditions, known current or recent alcohol abuse or drug abuse by subject history, a condition that may increase the risk of induced hypoglycemia or risk related to repeated blood testing. Investigator will supply rationale for exclusion
  • Participation in another clinical investigation (drug or device) within 2 weeks prior to screening or intent to participate during the study period
  • The presence of any other active implanted device (as defined further in the protocol)

Treatment and study plan

Continuous Glucose Monitoring System

Device

Eversense 365 Continuous Glucose Monitoring System and Gemini Glucose Monitoring System

Primary outcomes

  1. System agreement (15/15%, 20/20%, 30/30%, and 40/40%) for paired sensor FGM and reference measurements post-insertion for reference glucose values from 40-400 mg/dL.

    Time frame: 365 days

    Effectiveness Objective: To determine accuracy of the Eversense 365 Continuous Glucose Monitoring System and Gemini Glucose Monitoring System. The effectiveness measure will be system agreement (15/15%, 20/20%, 30/30%, and 40/40%) for paired sensor FGM and reference measurements post-insertion for reference glucose values from 40-400 mg/dL. Effectiveness measures will be evaluated descriptively and compared to the Eversense 365 CGM System.

  2. Number of device-related or sensor insertion/removal procedure-related serious adverse events

    Time frame: 365 days

    Safety Objective: To demonstrate safety of the Eversense 365 Continuous Glucose Monitoring System and Gemini Glucose Monitoring System. Incidence of device-related or sensor insertion/removal procedure-related serious adverse events in clinic and during home use from sensor insertion through removal and follow-up.

Study contacts

Contact information is provided by the study sponsor or research team.

Maggie Lewis

CONTACT

[email protected]

667-218-3309

Susan Huynh

CONTACT

[email protected]

301-407-2923

Sponsors and collaborators

Lead sponsor

Senseonics, Inc.

Industry

Registry information

Important dates

Study start
2025
Primary completion
2027
Study completion
2028
First posted
Feb 4, 2026
Registry last updated
Apr 21, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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