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Product Comparison: Continuous Glucose Monitors
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Guardian® REAL-Time System
Guardian® REAL-Time System

MiniMed Guardian®

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Rating (Avg)
Manufacturer Medtronic
Brand MiniMed
Product Name Guardian® REAL-Time System
Sensor Life 3 days
Probe Size (approx. volume in cu. mm) 4
Calibration Frequency (calibrations/day) 2.3 per day
Sampling Interval Every 5 minutes
Connects to Insulin Pumps none

Accuracy Consensus Error Grid: 98.9% A+B, Mean ARD: 19.7%, Median ARD: 15.6%
Availability From Medtronic MiniMed and authorized distributors
Availability: Approved Age Range 7+
Availability: Insurance Coverage Reports of some people obtaining coverage for sensors
Availability: Price (up to) $1,339 System, $35/sensor. $999 CGM Starter Kit includes transmitter and 10 sensors.
Availability: Test/Demo Kits n/a
Alarms: for Hypoglycenic and Hyperglycemic Events Yes
Alarms: Vector Technology (to identify rapid blood glucose changes) 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.
Alarms: Vibrate, Audio, or Both 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: Snooze Alarm Feature Yes, customizable for high and low alarms
Built in BGM No, but can use any meter and manually enter
Computer Software Carelink™ Personal Software
Displays Directional Trends Yes, arrows display how fast and in what direction, and 3, 6, 12 and 24-hour graphs
Displays Glucose Numbers Every 5 minutes
Displays Rate Changes Yes, single and double arrows up or down communicate how fast glucose levels are falling or rising
Monitor Batteries 1 AAA battery. Monitor alerts when change is needed.
Monitor Size (dimensions in inches) 3 x 2 inches
Range from Monitor Transmitter 6 feet
Sensor Calibration Requirement 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.
Sensor Probe: Length 12.7 mm
Sensor Probe: Gauge 23
Sensor Probe: Angle of Insertion 45 degrees
Sensor Probe: Insertion Device Available Sen-serter®. Manual insertion possible also.
Sensor Storage (refrigerated/room temp) Store at 36º - 80ºF. Lasts 6 months.
Startup Time at Initialization 2 hours
Transmitter: Surface Size (dimensions in inches) Sensor the size of a nickel. Transmitter is 1.4
Transmitter: Waterproof Monitor is not. Transmitter is. IPX8, only 8 feet for 30 minutes.
Transmitter: Batteries Rechargeable. Transmitter life about one year.
Warranty 9 months on transmitter, 1 year on monitor
Money Back Guarantee 30 day return policy for transmitter
Phone 1 (800) 328-2518
Website www.Minimed.com/products/guardian/index.html

Consumer Reviews

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Wednesday, Mar 25 2009 07:14 EST by My Rating:
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The continuous glucose monitoring system comes in three layers of protection with three different warnings. It is recommended for patients aged seven years and above with Type 1 or Type 2 diabetes. There is a model for patients aged seven to seventeen and for those aged eighteen or older. These mainly comprise predictive alerts, rate of change alerts and low and high alerts. The minimed guardian has proven useful in preventing oncoming lows and highs and in providing consistent glucose level reports. It is particularly good for those prone to lows and highs, who have problems detecting hypoglycemia, experience gestational and are pregnant. The glucose sensor is easy to insert whilst the monitor is small and comfortable. Overall, the minimed guardian is a step ahead as it easily identifies any underlying problems fingersticks might overlook.

Friday, Mar 06 2009 11:11 EST by My Rating:
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This was my first continuous blood sugar monitor and I thought it was great when I had it, but I changed insurance and had to go with another machine to get the probes my new insurance would pay for. Anyway this machine has all the bells and whistles. It will warn you BEFORE you reach a critical blood sugar range and takes a reading every five minutes. The probes can be worn for one week and they deliver the blood sugar info which you should be withing five feet of. You hardly notice you have it on and it can be worn in the shower, pool, or while you're asleep with no difficulty at all. Overall this is a very nice system that I wuold recommend to anyone.

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