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Comparison of Current Continuous Glucose Monitors (CGMs)

A continuous glucose monitor, also called CGMs, reveals short-term trends in the blood sugar as they happen. You can see the direction your blood sugar is taking in the last 1, 3, 6, 9, 12, or 24 hours, depending on what times the monitor offers. Various companies have already released continuous monitors, with more companies developing theirs every day. Significant differences in accuracy can be seen in one individual when two different continuous glucose monitors are worn at the same time.

Companies Guardian REAL-Time
Continuous Glucose Monitoring System
Dexcom G4 Platinum MiniMed® 530G with Enlite
Availability FDA approved in June 2006 (monitor) and February 2007 (MiniLink Transmitter) and available for purchase STS system FDA approved in March, 2006. Upgraded since and available for purchase FDA approved in September 2013
  Medtronic Guardian RT Dexcom Continuous Glucose Monitor Paradigm Continuous Glucose Meter
Weight 2.8 oz 2.4 oz 4 oz
Screen Size approx 1.8" x 0.75"   522/722 screen
Monitor Size 3" x 2" 4" x 1.8" x 0.5" No Monitor, displays on pump
Transmitter/
Sensor Size
1.64" x 1.4" x 0.37"   2" x 1.5" / 0.75" diameter
Sensor Life 3 days 7 days 6 days
Sensor
Canula size
14 mm 13 mm 8.75 mm
Angle of
Sensor
Insertion
45º 45º 90º
Insertion
Device
Sens-serter, manual insertion possible DexCom Applicator Enlite Serter
Start-Up
Initialization
Time
2 hours 2 hours 2 hours
Calibration 2 hours after insertion, within next 6 hours after first, then every 12 hours. Will alarm if calibration value not entered. every 12 hours with OneTouch Ultra 2 hours after insertion, again 6 hours after first, then every 12 hours. Will alarm if calibration value not entered.
User set
alarms
on
low/high
Yes, 8 different thresholds users can set for different times throughout day and night, different sounds for each alarms, loud backup alarm Yes, one high, two low (user set limit + 55mg/dl alarm) Yes, differents sounds for each alarm, loud back up alarm
Predictive
alarms
for
low/high
Yes, can be set to warn 5-30 minutes before glucose limit has been reached 0 10, 20, 30 minutes
Alarms for
rate
of
change
Yes, can be set to warn at rates of change from 1.1 mg/dL per minute to 5 mg/dL per minute one each for high and low (either 2 or 3 mg/dl per minute)  
Displays
glucose
numbers
Every 5 minutes Every 5 minutes Every 5 minutes
Displays
Directional
Trends
Yes, 3, 6, 12, and 24 hour graphs Yes, displays a 1, 3, 6, or 12 hour glucose graph Yes, 3, 6, 12, 24 hour graphs
Displays Rate
of Change
Yes Yes, arrows indicate steady, slow/medium/fast rise or fall Yes
Review
glucose data?
Yes, last 24 hours Yes, last 24 hours Yes, last 24 hours
Capture
events
Yes, user can enter insulin, carbs, BGs, and exercise events Yes, user can enter insulin, carbs, BGs, exercise, and health events  
Alarms,
vibrates,
or both
Vibrate, escalating alarm, or both Alarm or Vibrate, vibrate for low first, then alarm Vibrate, escalating alarm, or both
Waterprooof
Transmitter
Yes, hot water not suggested Yes, up to 3 ft for 30 min Yes, hot water not suggested
Transmitter
Batteries
Rechargeable, 14 days or more use per change, 1 year expected life, additional transmitter and charger $649 life unknown, non-replaceable, additional transmitter $250 9 months, additional transmitter $500
Receiver
Batteries
1 AAA rechargable, every 5 days for 3 hours N/A
Range 6 feet 20 feet 6 feet
Snooze
Alarm
Yes, High snooze can be set from 5 min to 3 hrs, Low snooze between 5 minutes and 1 hour Yes Yes, both high and low alarms settings differ
BG Monitor Any Any Any
Computer
Software
Medtronic CareLink Personal Dexcom Studio Medtronic CareLink Online
Upgrade
program
Yes, call 1-800-Minimed for info Yes, $150 upgrade price Medtronic Pathway Program
Warranty 1 year on monitor, 6 months on transmitter 12 months for receiver and transmitter 1 year on transmitter, 4 years on pump
Money-back
gaurantee
30 day, not for sensors 30 day, not for sensors 30 day, not for sensors

Get Pumping Insulin for complete pump information --- it is the most helpful book available on pump use with continuous monitors.