Table 2.

Specification comparison of commercial blood glucose sensors.

Features	Abbott freestyle navigator [39]	MiniMed paradigm real-time system [40]	MiniMed guardian real-time system [41]	DexCom [42]
Accuracy	Varies	Consensus error grid: 98.9%  A mard(mean) −19.7% (median) −15.5%	Consensus error grid: 98.9%  A mard(mean) −19.7% (median) −15.5%	Consensus error grid: 95.4%  A mard(mean) −49% (median) −15.9%
Startup initiation time	10 hours	2 hours	2 hours	2 hours
Sensor life	5-day wear indication	Above 72 hours	Above 72 hours	Above 72 hours
Calibration method	Requires calibration at 10, 12, 24, and 72 hours after the insertion of the sensor	Alarms when calibration value is not entered on time. First and second calibration should be done for 2 and 6 hours after insertion	Alarms when calibration value is not entered on time. First and second calibration should be done for 2 and 6 hours after insertion	First calibration after 30 minutes and then for every 12 hours. Manual calibration is not possible
Frequency of display	Every 1 minute	Every 5 minutes	Every 5 minutes	Every 5 minutes
Transmitter memory	—	Yes, the transmitter stores missed data for up to 40 minutes	Yes, the transmitter stores missed data for up to 40 minutes	No, transmission lost is data lost
Range of monitor to transmitter	10 feet	6 feet	6 feet	5 feet
Monitor batteries	Uses 2 AAA batteries with replacement for every three months	No separate monitor required. Uses insulin pump	Uses 2 AAA Batteries. Indication is set for chance of battery	Uses rechargeable batteries
Monitor size	3“ × 2.5”	Separate monitor is not available. Uses insulin pump for display	3“ × 2.7”	3“ × 2.5”
Alarms on user-set low and high thresholds	Applicable	Applicable	Applicable	Applicable