Mealtime or Post-meal Dosing of URLi in Medtronic 780G Hybrid Closed Loop System

A Pilot Study Comparing the Efficacy of Dosing Ultra Rapid Insulin Lispro in a Medtronic 780G Hybrid Closed Loop System at Mealtime or Postmeal

This is a pilot study to compare premeal to postmeal dosing of ultra rapid lispro insulin (URLi) used in a MiniMed 780G system hybrid closed loop system. Subjects with type 1 diabetes mellitus (T1DM) already using a 780G hybrid closed loop system with URLi will be included. After signing a remote digital informed consent, a baseline record of the MiniMed 780G system will be downloaded from the Medtronic digital platform (Carelink system [1]) and subjects will be asked to fill an online questionnaire regarding their time of insulin dosing preferences and a 3-day online food diary [2]. During the intervention period subjects will be asked to provide a bolus dose of insulin only at the end of meals for up to 4 weeks. During the last week of the intervention period, subjects will be asked to fill out a 3-day online food diary [2]. At the end of the intervention period- a Carelink report [1] will be collected remotely and subjects will be asked to fill again the online questionnaire regarding their time of dosing preferences.

1. Primary Objective: To assess the efficacy of premeal dosing to post-meal dosing on parameters of glycemic control as obtained from continuous glucose monitoring.
2. Secondary Objective: To assess patient dosing preferences and the effect of premeal dosing vs. post-meal dosing on patient reported outcomes

Ref:

1. carelink.medtronic.eu
2. NutRatio.com.

Inclusion Criteria:

Participants must be 18 years of age or older (inclusive).

Diagnosed with Type 1 Diabetes Mellitus (T1DM).

Already using the MiniMed 780G hybrid closed-loop system with Ultra Rapid Lispro Insulin (URLi) for at least 2 months prior to study enrollment.

Able and willing to provide informed consent electronically.

Willing and able to comply with the scheduled visits and other study procedures, including remote monitoring and completing questionnaires.

Exclusion Criteria:

Participants with a medical history of untreated active proliferative retinopathy.

Note: Subjects with non-proliferative retinopathy may be included. Subjects with treated proliferative retinopathy may be included based on the investigator's clinical judgment.

Severe acute or chronic medical or psychiatric conditions or laboratory abnormalities that may increase the risk associated with study participation or interfere with the interpretation of study results, as judged by the investigator.