Automated Insulin Delivery: How Control-IQ and Omnipod 5 Work

What automated insulin delivery is

Automated insulin delivery (AID), often searched as automated insulin dosing, links three parts: an insulin pump, a continuous glucose monitor (CGM) and an algorithm. Every few minutes the algorithm reads the CGM, predicts where glucose is heading and raises, lowers or pauses insulin to keep it in range. The common names are hybrid closed loop and, informally, artificial pancreas.

Most systems are "hybrid" because you still tell the system about meals. The algorithm handles background insulin and corrections on its own, but carbohydrate arrives faster than it can react, so a meal bolus is still needed.

The main AID systems compared

Features and approved ages differ by country and software version. Your diabetes team and the manufacturer's current guide have the details for your system.

Do weight and total daily dose change what Control-IQ delivers?

Yes. Control-IQ+ asks for body weight and total daily insulin at setup, and uses them to personalise how strongly it responds from the first day. It accepts weights from 20 to 440 lb and daily insulin from 5 to 200 units. An entered total that is far from your real use makes the early responses too cautious or too aggressive, so update both values when your weight or insulin needs change. The insulin pump settings calculator estimates a total daily dose and starting settings.

Other systems use different inputs. Omnipod 5 starts from your programmed settings and adapts as it learns your actual insulin use. iLet needs only body weight and works out everything else itself.

Settings that still matter

Automation does not make pump settings irrelevant. Most systems still use your carb ratio for meal boluses, your correction factor for manual corrections, and your active insulin time to avoid stacking doses. The idea behind active insulin is explained in what insulin on board means. The basal rates you program also act as the fallback when the system drops out of automatic mode, for example during a sensor warm-up. The pump basal rate calculator estimates those rates.

What AID improves, and what it does not

In the iDCL trial, published in 2019, people with type 1 diabetes using Control-IQ spent 71% of the day in range, compared with 59% using a pump and CGM without automation. That difference is about 2.6 more hours in range every day. Overnight control usually improves most, because no meals or activity interfere. The time in range calculator turns CGM readings into the same measure.

• It still needs meal boluses. Missed or late boluses remain the most common cause of highs on hybrid systems.
• High-fat and high-protein meals raise glucose late, and the algorithm only reacts once the rise appears.
• Exercise needs planning. Most systems have an exercise or activity mode that raises the glucose target; it works best when set in advance.
• It depends on the sensor. Inaccurate CGM readings lead to inaccurate dosing, so fingerstick checks still matter when symptoms do not match the number.

Who uses AID

The American Diabetes Association recommends offering AID to people with type 1 diabetes who can use it safely, including children. In the United States, Omnipod 5 was cleared for adults with type 2 diabetes in 2024 and Control-IQ+ in February 2025, so insulin-treated type 2 diabetes is now a growing group of users. Open-source systems such as Loop and AndroidAPS also exist, but most are built by users and are not regulator-approved products. AID systems still begin from settings that our free insulin pump and dose calculators can estimate.

Automated Insulin Delivery: Limitations & Safety Notes

• This guide explains how AID systems work in general. Your system's user guide and your diabetes team are the authority on its settings.
• Keep a backup plan with injections, a meter and supplies in case of pump, pod or sensor failure.
• Hybrid systems still need meal boluses; automation does not replace carbohydrate counting or meal announcements.
• Ketones need checking when glucose stays high, because a blocked or dislodged infusion set stops insulin without warning.

Frequently Asked Questions: Automated Insulin Delivery