Extended Bolus for Meals in a Closed-loop System
This study aims to evaluate whether the use of an extended bolus will improve glucose control with high-fat high protein meals using a closed-loop system. The new knowledge gained from this study may provide a method to allow for the proper administration of insulin over an extended period to mitigate the risk of prolonged hyperglycemia or early hypoglycemia.
Conditions:
🦠 Type 1 Diabetes
🗓️ Study Start (Actual) 15 July 2022
🗓️ Primary Completion (Estimated) 30 September 2024
✅ Study Completion (Estimated) 30 November 2024
👥 Enrollment (Estimated) 30
🔬 Study Type INTERVENTIONAL
📊 Phase PHASE4
Locations:
📍 San Francisco, California, United States

📋 Eligibility Criteria

Description

  • Inclusion Criteria
  • * Age between 13 and 19 years old, A1C \> 6% at screening
  • * Diagnosed with type 1 diabetes for at least one year
  • * Total daily dose (TDD) of insulin ≥ 0.3 units/kg/day
  • * Currently using the Control IQ closed-loop system
  • * Willing to abide by meal recommendations and study procedures
  • * Willing and able to sign the Informed Consent Form (ICF) and/or has a parent or guardian willing and able to sign the ICF
  • * Use an Android or Apple smartphone
  • * Willingness not to start any new non-insulin glucose-lowering agent during the course of the trial
  • * Participant and parent(s)/guardian(s) willingness to participate in all training sessions as directed by study staff
  • * Parent/guardian proficient in reading and writing English
  • * Live in the United States, with no plans to move outside the United States during the study period
  • Exclusion Criteria
  • * A1C \>10%
  • * One or more episodes of severe hypoglycemia or DKA requiring ER visit or hospitalization within the past three months
  • * Used non-insulin anti-diabetic medication within the last 30 days other than metformin
  • * Known history of gastroparesis, seizure disorder, adrenal insufficiency, or ongoing renal or hepatic disease
  • * Pregnancy or lactation
  • * Untreated or unstable hypothyroidism
  • * Currently undergoing cancer treatment or systemic treatment with steroids
  • * Untreated or inadequately treated mental illness
  • * Current alcohol abuse
  • * Current illness that would interfere with participation in the study
  • * Delayed gastric emptying or any concurrent conditions that can be associated with delayed gastric emptying or altered digestion; and the use of any medication that affects gastric emptying
  • * Celiac Disease
Ages Eligible for Study: 13 Years to 19 Years (CHILD, ADULT)
Sexes Eligible for Study: ALL
Accepts Healthy Volunteers: No

🗓️ 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 Registration Dates

  • First Submitted 24 June 2022
  • First Submitted that Met QC Criteria 8 July 2022
  • First Posted 12 July 2022

Study Record Updates

  • Last Update Submitted that Met QC Criteria 28 June 2024
  • Last Update Posted 1 July 2024
  • Last Verified June 2024