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Select Device Freestyle Lingo Freestyle Libre 3 Freestyle Libre 2 Freestyle Libre 14 Day Dexcom G7 Dexcom G6 Dexcom Stelo Guardian Connect Medtronic Simplera Eversense Meter Omnipod Omnipod Dash Medtronic 780G Medtronic 630G Tandem t:slim X2 Bigfoot Unity Medtronic InPen Tempo Pen NovoPen 6/NovoPen Echo Insulin Pen Afrezza CeQur Simplicity Patch V-Go Patch Omnipod GO Patch Syringe and Vial Beta Bionics iLet Pancreas Control IQ with Dexcom Control IQ with Freestyle Libre Medtronic 780G with Smart Guard Omnipod 5 Tandem Mobi Tidepool Loop twiist DIY Loop Apple Series 6/7/8/9/10/SE (2nd Generation) Garmin vívosmart 5™ Garmin Venu Sq 2 Garmin Venu 3 Garmin vivoactive 5 Garmin Fenix 8 Garmin vivofit jr 3 Garmin Forerunner 165/265/965 Garmin epix (Gen 2) Garmin Enduro 3 Fitbit Ace LTE Fitbit Charge 6 Fitbit Inspire 3 Fitbit Versa/Versa 2/4/Versa Lite Fitbit Sense 2 Fitbit Luxe Google Pixel 2/3 Samsung Galaxy 4/5 Xiaomi Mi Band 9 Oura Ring Whoop 4.0 Withings ScanWatch 2 Withings ScanWatch Lite Pedometer 3D Pedometer
Summary
This system is the first automated insulin delivery system that combines the Tandem t:slim x2 with the Freestyle Libre 2 Plus continuous glucose monitor (CGM) to automatically adjust insulin delivery in response to glucose trends. It's easy to use and allows bolus dosing directly from a compatible iOS or Android smartphone.
Good to have. Tried and true. Backup or day to day. Fingersticks required.
Components
Control IQ with Freestyle Libre : Pump
Touch screen pump connects tubing to a small patch called an infusion set that attaches to the body.
Control IQ with Freestyle Libre : Sensor
Automatic applicator inserts sensor just under the surface of the skin and can be applied to many places on the body.
Control IQ with Freestyle Libre : Controller
t:slim pump receives CGM readings to automatically adjust basal insulin delivery via an infusion set. Compatible smartphone can be used to view and control insulin delivery using the t:connect app.
Control IQ with Freestyle Libre : Infusion Set
An infusion set contains the thin plastic tubing that delivers insulin from the pump to the body.
Generic Meter : Lancets
Tiny needle called a lancet is used to poke the skin (on a finger or on your arm) to get a small sample of blood. The lancing device is packaged with the glucometer.
Generic Meter : Test Strips
The strips work with the glucose meters to “read” blood sugar levels. One box of test trips usually contains between 25-50 single use strips.
Meter : Glucometer
The meter measures the amount of sugar in the small sample of blood that is placed on the disposable test strip. Most CGMs require testing blood sugar with a meter to calibrate the CGM device daily.
Device Details
Overview
This system automatically adjusts insulin levels from the Tandem t:slim X2 pump based on the Libre 2 Plus readings for more time in range.
Good to have. Tried and true. Backup or day to day. Finger-sticks required.
Affordability and Access
$$$$
Widely covered for insulin-dependent type 1 and 2. Supplies for Pump and Sensor provided by DME suppliers. Price range; $5-$6,995 to start and $0-$200/month.
$$$$
Most accessible. Available over the counter at all Pharmacies. Price range; $0-$200/month depending on insurance coverage.
Data Monitoring Options
Yes
The t:connect mobile app for the t:slim X2 pump wirelessly uploads pump and CGM data to the cloud-based t:connect web application.
Limited Options
Data is available directly on the device. Some meters may be compatible with the Tidepool data management system.
Data View Options
Yes
Data can be viewed directly on the pump screen or on the t:connect mobile app (available for both iOS and Android devices).
Yes
Data may be viewed directly on the device. Some meters contain a built-in USB connection that allows information to be uploaded to a data management system.
Duration and Storage
3-day pump 15-day sensor
Sensors last 14 days, and transmitters last 90 and work at 50ºF - 113ºF. Pump can be used for up to 72 hrs, battery life lasts five days with the use of CGM, and work between 40°F - 99°F.
Daily
Meters can last several years with battery changes/charging, they're used daily and work between 65ºF-86°F
Vision / Auditory / Dexterity
NO text to speech
YES vibration alerts
A LOT of dexterity needed
NO text to speech
NO vibration alerts
A LOT of dexterity needed
Patient Considerations
Active Lifestyle
Exercise Activity. Can manually increase target range to 140-160 mg/dl. Insulin decreases when Control IQ predicts CGM ≤140 mg/dl and increases when ≥ 160 mg/dl within 30 minutes. Autocorrections will still occur. Pump is not waterproof. CGM is waterproof.
Must pause activity to check blood sugar.
Avoiding Highs and Lows
Auto basal and bolus insulin. Responds to CGM data by increasing or decreasing basal insulin delivery to prevent highs and lows and maintain a target blood glucose of 110 mg/dl. Auto-bolus is available once per hour to correct blood sugar above 180 mg/dl.
Less data. Meters don't give as much blood sugar data as sensors do and require a high level of engagement and effort to avoid highs and lows.
Comfort
Low profile. Low profile/low maintenance sensor. Small tubed pump with the most infusion sets to pick from.
Meter supplies carried and requires visible blood.
Easy Insulin Dosing
Automatically adjusts dosing. Sensor integration allows for the pump to automatically adjust insulin doses. More customizable dosing than pens or syringes. Basal in 0.001 increments, bolus in 0.01 increments. Extended bolus available.
Limited features. No info on blood sugar trends.
Easy to Use
Modern & no scanning required. Rechargeable and touchscreen pump. Sensor does not require scanning and sends minute-by-minute readings directly to the pump.
Large display. Device typically has large display numbers for easier readouts, and it's very simple to operate.
Fewer Fingersticks
Factory-calibrated sensor. Fingersticks needed for backup only.
Frequent fingersticks are unavoidable.
Privacy
Discreet. Ability to check blood sugar on phone or watch. Ability to bolus on a compatible smartphone. Pump has tubing but can be clipped to clothing or placed in a pocket to be discreet when needed. CGM has a built-in hypoglycemia safety alarm that alerts users when glucose is below 55 mg/dl and is always on.
No attached device for blood glucose monitoring.