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  Back to Continuous Sensors Continuous Glucose Sensors
Feature Abbott FreeStyle Navigator® MiniMed Paradigm®
REAL-Time System
MiniMed Guardian®
REAL-Time System
DexCom™ SEVEN® PLUS
Photos photo
Navigator sensor on Monica's arm
Photo
MiniMed Paradigm REAL-Time with
new, smaller MiniLinkTM Transmitter
Photo from Medtronic MiniMed
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Guardian REAL-Time System with
new, smaller MiniLinkTM Transmitter
Photo from Medtronic MiniMed
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Photo from DexCom
Availablility Across the US Across the US Across the US Across the US
FDA approval March 13, 2008 for adults 18+ Children 7-17 and Adults 18+ Children 7-17 and Adults 18+ March 2006 for adults 18 and older
Communicates with an insulin pump No Yes, communicates with the Paradigm 522 and 722 pumps No No
Price Receiver and transmitter: between $960 and $1040
Six sensors (a month's supply): between $360 and $390
$999 CGM starter kit includes MiniLink transmitter and 10 sensors, or Upgrade with the Pathway Program for current in-warranty MiniMed Paradigm insulin pump users. New insulin pump would be handled through insurance coverage and contracts negotiated. US: $1,339 System + $35/sensor
UK: £2750, sensors £235/4 or £565/10
$450 (equipment: receiver, transmitter)
$240 (4-pack of sensors that last 7 days each = 28 days)
Insurance Coverage Insurance covereage is commonplace Insurance covereage is commonplace Insurance covereage is commonplace Insurance covereage is commonplace
Accuracy   Consensus Error Grid: 98.9% A+B
MARD (Mean) - 19.7%
MARD (Median) - 15.6%
Consensus Error Grid: 98.9% A+B
MARD (Mean) - 19.7%
MARD (Median) - 15.6%
Clark Error Grid 97% A&B; Median 11.4%; Mean 15.7%
GluocoWatch Biographer data for comparison:
MARD: 17% to 21%
Clarke Error Grid A+B: 94% Clarke Error Grid A: 60%
Sensor life 5-day wear indication FDA approved for 72 hours; users report longer wear times FDA approved for 72 hours; users report longer wear times FDA approved for 7 days; users report significantly longer wear times
Length of sensor probe 6 mm 0.5 inches 0.5 inches 13 mm
Gauge of sensor probe 21 23 23 26
Angle of sensor insertion 90 degrees 45 degrees 45 degrees 45 degrees
Insertion Device Available Each sensor has a disposable inserter Sen-serter®, manual insertion possible also Sen-serter®, manual insertion possible also DexCom SEVEN Applicator
Monitor size 3" x 2.5" Displays on insulin pump, no separate monitor 3" x 2" 3" x 2.5"
Start-up Initialization Time 10 hours 2 hours 2 hours 2 hours
Calibration Calibrate at 10, 12, 24 and 72 hours after insertion with no further calibration for the final 2 days of the 5 day wear First calibration is 2 hours after insertion. Second calibration within next 6 hours after first, then every 12 hours. Will alarm if calibration value not entered. First calibration is 2 hours after insertion. Second calibration within next 6 hours after first, then every 12 hours. Will alarm if calibration value not entered. Calibrate every 12 hours, first calibration must have 2 done within 30 minutes of each other. Can calibrate at any glucose rate of change (blood glucose need not be stable).
Transmitter/Sensor or body surface size 2.05" x 1.23" x .43", weight 0.48 oz Sensor the size of a nickel. Transmitter is 1.4" x 1.1" x 0.3" and attaches to the sensor. Sensor the size of a nickel. Transmitter is 1.4" x 1.1" x 0.3" and attaches to the sensor. 1.5" x .9" x .4", weight 0.24 oz
Alarms on user-set low and high threshholds Yes Yes Yes Yes
  Note: In clinical trials, some people never respond to alarms at night regardless of the volume. An alarming device (receiver or pump) that is under covers, a pillow, or underneath a body is almost impossible to hear. If you are considering a continuous glucose sensor, be sure to investigate the device's alarms to see if they will meet your needs.
Displays glucose numbers Every 1 minute Every 5 minutes Every 5 minutes Every 5 minutes
Displays Directional Trends Yes, always has directional and rate of change arrow. Can view 2, 4 ,6, 12 or 24 hour glucose graph. Can go back 28 days. Yes, arrows that display how fast and in what direction, and 3- and 24-hour graphs Yes, arrows that display how fast and in what direction, and 3, 6, 12 and 24-hour graphs Yes, always has directional and rate of change arrow. Can display a 1, 3, 6, 12 or 24 hour glucose graph
Displays Rate of Change Yes, Sideways arrow means dropping at less than 1 mg/dl/ minute. Up or Down arrow means raising/dropping at over 2 mg/dl a minute. 45 degree arrow means dropping/raising between 1 and 2 mg/dl per minute. Yes, single and double arrows up or down communicates how fast glucose levels are falling or rising Yes, single and double arrows up or down communicates how fast glucose levels are falling or rising Yes, single and double arrows up or down communicates how fast glucose levels are falling or rising
Predictive Alarming Yes, alarm on 10, 20, or 30 minutes before it thinks that you will hit that number based on the current trend. It estimates a future number by using algorithms and vector technology. (One parent has her child's set at 20 minutes notice for highs, and 30 minutes notice for lows.) No Yes. Predictive Alerts can be set to warn you 5, 10, 15, 20, 25, or 30 minutes before glucose limits have been reached. Rate of Change Alerts can be set to warn you when glucose levels are changing between 1.1 mg/dL/min to 5 mg/dL/min, in 0.1 increments. No
Alarm details Alarms or Vibrates Alarms (short, medium, or long beep options) or vibrates. Alarms repeat until cleared; can set alarm snooze for low and high glucose level alarms. Alarms (short, medium, or long beep options) or vibrates. Alarms repeat until cleared; can set alarm snooze for low and high glucose level alarms. Alarms or Vibrates
Transmitter Memory   Yes, the transmitter stores up to 40 minutes of missed data. Weak signal alarm. Yes, the transmitter stores up to 40 minutes of missed data. Weak signal alarm. No - lose transmission, lose data
Transmitter Waterproof Yes Yes, IPX8, 8 feet for 30 minutes. Yes, IPX8, 8 feet for 30 minutes. Yes
Transmitter Batteries Watch Battery. Replace every month. Rechargeable. Non-replaceable. MiniLink Transmitter life about 1 year. $999 CGM Starter Kit includes transmitter and 10 sensors. Rechargeable. Non-replaceable. MiniLink Transmitter life about 1 year. $999 CGM Starter Kit includes transmitter and 10 sensors. Non-replaceable. Additional Transmitter is $250.
Monitor Batteries 2 AAA batteries. Replace every 3 months. No separate monitor required; results displayed on MiniMed Paradigm 522 or 722 insulin pump 1 AAA battery. Monitor alerts when change is needed. Must recharge the battery every 5 days, charge time 3 hours
Range of Monitor to Transmitter (Factory Stated) 10 feet (reports of significantly greater distance) 6 feet 6 feet 5 feet
Sensor Storage: Refrigerated or Room Temperature Room Temperature, 6 month life Storage between 36-80 F without the need for refrigeration. 6 month life Storage between 36-80 F without the need for refrigeration. 6 month life Room Temperature, 4 month life
Snooze alarm feature Yes, 1 hour silence Yes, customizable for high and low alarms Yes, customizable for high and low alarms  
Built in BG monitor Built in Freestyle monitor OneTouch® UltraLink™ meter No, can use any meter and manually enter Manually calibrate with any glucose meter
Computer Software Freestyle CoPilot Carelink™ Personal Software Carelink™ Personal Software DexCom Data Manager® 3 Software
Warranty   6 months on transmitter, 4 years on insulin pump 9 months on transmitter, 1 year on monitor 1 year warranty for receiver and transmitter
Upgrade program   Paradigm Pathway Program No  
Money-back guarantee   30 day return policy for transmitter 30 day return policy for transmitter 10 days if package unopened
Developing Technology Working on communications with a pump Closed loop sensor and pump in clinical trials (Yale, elsewhere).   Longterm (about 1 year/outpatient procedure) Implantable Sensor
Official Product Website FreeStyle Navigator® Continuous Glucose Monitoring System MiniMed Paradigm® REAL-Time Insulin Pump and Continuous Glucose Monitoring System The Guardian® REAL-Time Continuous Glucose Monitoring System DexCom™ SEVEN® PLUS
FDA Approval Links FreeStyle Navigator® Continuous Glucose Monitoring System - P050020 Paradigm REAL-Time and Guardian REAL-Time Systems P980022/S015 Paradigm REAL-Time and Guardian REAL-Time Systems P980022/S015 STS-7 Continuous Glucose Monitoring System - P050012/S001
Additional web sites and blogs     LifeAfterDx - Guardian Blog FDA Site for the DexCom STS
Photos of DexCom STS in Use
My New Friend Dexcom

Selected Scientific Studies About Continuous Glucose Sensors

For More Information

Thanks to Jennifer White for compiling the original table. Please use our Feedback Form to share updated information or corrections.



                 
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Last Updated: Thursday February 27, 2014 19:28:20
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