Closed Loop Context Aware AID

Recruiting now · Not applicable

Conditions studied: Type 1 Diabetes

In brief

An artificial pancreas (AP) is a control system for automatic insulin delivery. The investigators have implemented a high blood sugar detection and dosing algorithm for use within an AP control system. If a high blood sugar pattern is detected, correction insulin will be calculated and delivered. The investigators will test how well the new algorithm manages glucose compared to the AP control system without high blood sugar detection and dosing. This type of algorithm may improve glucose control for high risk patient populations.

Key facts

Study ID

NCT06676657

Run by

Oregon Health and Science University

People needed

10

Starts

2024-11-22

Expected to finish

2025-08-30

Last updated by the study team

2025-04-11

Who can join

Age: 18 and older, up to 100. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Diagnosis of type 1 diabetes mellitus for at least 1 year.
• Male or female participants 18 and older.
• HbA1c or GMI ≥ 7.0% at screening.
• Physically willing and able to perform 30 min of exercise (as determined by the investigator after reviewing the participant's activity level).
• Current use of an FDA-approved hybrid closed loop system for ≥3 months.
• Lives with another person age 18 or older who will sleep in the house at night and that can attend the training on using the system.
• Lives within 40 miles of OHSU
• Total daily insulin requirement is less than 139 units/day.
• Able to read, write and understand spoken English
• Current use of a smartphone so can be contacted by study staff off-campus.
• Willingness to follow all study procedures, including attending all clinic visits.
• Willingness to sign informed consent and HIPAA documents.

You may not qualify if…

• GMI or A1c <6.5% or >10.5%
• Sensor glucose shows < 2% of time above 250 mg/dl in last 30 days.
• Individual of childbearing potential who is pregnant or intending to become pregnant or breast-feeding, or is not using adequate contraceptive methods. Acceptable contraception includes birth control pill / patch / vaginal ring, Depo-Provera, Norplant, an IUD, the double barrier method (the woman uses a diaphragm and spermicide and the man uses a condom), or abstinence.
• Any cardiovascular disease, defined as a clinically significant EKG abnormality at the time of screening or any history of: stroke, heart failure, myocardial infarction, angina pectoris, or coronary arterial bypass graft or angioplasty. Diagnosis of 2nd or 3rd degree heart block or any non-physiological arrhythmia judged by the investigator to be exclusionary.
• Renal insufficiency (GFR < 60 ml/min, using the MDRD equation as reported by the OHSU laboratory).
• Liver failure, cirrhosis, or any other liver disease that compromises liver function as determined by the investigator.
• History of severe hypoglycemia during the past 6 months prior to screening visit or hypoglycemia unawareness as judged by the investigator. Participants will complete a hypoglycemia awareness questionnaire. Participants will be excluded for four or more R responses.
• History of diabetes ketoacidosis during the prior 6 months prior to screening visit, as diagnosed on hospital admission or as judged by the investigator.
• Adrenal insufficiency.
• Any active infection (example skin infection requiring antibiotics)
• Known or suspected abuse of alcohol, narcotics, or illicit drugs.
• Seizure disorder.
• Active foot ulceration.
• Peripheral arterial disease.
• Major surgical operation within 30 days prior to screening.
• Use of an investigational drug within 30 days prior to screening.
• Chronic usage of any immunosuppressive medication (such as cyclosporine, azathioprine, sirolimus, or tacrolimus).
• Bleeding disorder or platelet count below 50,000.
• Allergy to Fiasp insulin
• Current administration of oral or parenteral corticosteroids.
• Any life threatening disease, including malignant neoplasms and medical history of malignant neoplasms within the past 5 years prior to screening (except basal and squamous cell skin cancer).
• Use of beta blockers or non-dihydropyridine calcium channel blockers.
• Current use of any medication that can lower glucose other than insulin (ex. Wegovy, Jardiance) with the exception of metformin if dose has been stable for ≥3 months and patient willing to not change dose during study.
• Gastroparesis
• Diet consisting of less than 50 grams of carbohydrates per day.

Where it is running

• Oregon Health and Science University — Portland, Oregon, United States (enrolling)

Full record on ClinicalTrials.gov

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