Dexcom SEVEN User Manual page 123

table 9. percentage of Seven System readings within 20%, 30% and >40% of the ySi
Laboratory reading with data stratified in 4-hour increments after calibration and by
glucose concentration (Day 1, 4, and 7)
Time from
Calibration and
YSI Glucose Range
(mg/dL)
40-75 mg/dL
0-4 hours
4-8 hours
8-12 hours
76-180 mg/dL
0-4 hours
4-8 hours
8-12 hours
181-350 mg/dL
0-4 hours
4-8 hours
8-12 hours
351-400 mg/dL
0-4 hours
4-8 hours
8-12 hours
Calibration cycles across days 1, 4, and 7 were evaluated and there were no significant
differences noted.
There is minimum data to support updating calibration less frequently than every 12 hours. It
is recommended to calibrate the Seven System a minimum of every 12 hours.
Number of Paired % of Readings within
Readings
47
62
36
520
371
260
434
333
210
21
34
18
% of Readings within
20% of YSI 30% of YSI
77%
73%
64%
64%
73%
72%
78%
67%
73%
90%
68%
28%
Seven
% of Readings
greater than 40%
of YSI
94%
90%
92%
81%
89%
85%
92%
90%
92%
95%
91%
100%
System User's Guide | 119
™
2%
6%
0%
6%
5%
5%
2%
1%
5%
0%
0%
0%