Page 148 - Glucose Monitoring Devices

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Available CGM systems

elimination of compulsory capillary blood glucose calibration, previously required
on sensor insertion and every 12 h with its predecessor. The transmitter can be
reused when changing sensors, however, must be discarded after exceeding its
3-month life span. Dexcom CGMs allow the sharing of data reports with healthcare
professionals and carers via the Dexcom Clarity software and various open-access
data storage services.

Medtronic
The Guardian Connect is Medtronic’s latest offering combining their Guardian 3
sensor and Guardian 3 Link transmitter to deliver an easily deployed slim profile
CGMs. Housing a rechargeable battery, the Guardian3Linktransmitter requires
charging when replacing sensors after 7 days of use and can be reused for over
1 year. A 2-h warm-up period is required following insertion before glucose levels
are updated at 5-min intervals. Data are transmitted using Bluetooth technology
and are accessible via the Guardian Connect smartphone app, the MiniMed
640G, and the new 670G insulin pumps. Integration with the newly available
sensor-augmented Minimed 670G utilizes Medtronic’s SmartGuard self-
adjusting insulin delivery system (see section Future of CGM). Although both sys-
tems promise almost similar levels of accuracy, Guardian Connect is dependent on
twice daily CBG calibration to achieve a MARD of 10%. The inclusion of a
10e60 min predictive alert feature for anticipating hypo- and hyperglycemia
events allows users to lower glycemic variability by preemptive intervention.
Automated data uploads and data-sharing functions are managed via the Medtronic
Carelink Software.

Medtrum
The S7 EasySense by Medtrum delivers an easy-to-use CGM system with an
impressive 14-day sensor life span. Insertion of the S7 sensor is a simple process
requiring calibration twice on initial application and once daily thereafter. A life
span of 3 months allows the S7 transmitter to be reused during intervening sensor
changes. Updating and storing real-timedataonthe EasySenseapp andlocally
within the CGM transmitter provide accessibility to a variety of smartphone
platforms and ensure data redundancy. Medtrum’s A6 Touchcare system integrates
their A6 CGM device, P6 disposable patch pump, and proprietary handheld
personal diabetes manager (PDM) to deliver a sensor-augmented pump with low
glucose and predictive low glucose suspend features. The A6 sensor boasts a
MARD of 9%, with a 7-day sensor life span and requirement for twice-daily
calibration. Furthermore, the A6 Touchcare is reliant on the PDM device to
view real-time data, deliver bolus inulin doses, change basal insulin rates, and
apply the predicted low glucose suspend feature. Data storage is managed on the
PDM and transmitter and can be paired to the easy touch smartphone app.