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Table 3-A. Concurrence of G7 CGM sensor readings and YSI values by CGM
glucose range (adults; n=308)
CGM
YSI value range (mg/dL)
sensor
reading
range
<40 40- 60 61- 80
(mg/dL)
16
105
<40
7.1%
46.9%
9
1,418
40- 60
0.4%
58.0%
1
657
61- 80
0.0%
12.0%
49
81- 120
---
0.7%
121-
2
---
160
0.0%
161-
---
---
200
201-
---
---
250
251-
---
---
300
301-
---
---
350
351-
---
---
400
>400
---
---
132
81-
121-
120
160
97
3
3
43.3%
1.3%
1.3%
944
71
2
38.6%
2.9%
0.1%
4,134
678
11
75.4%
12.4%
0.2%
1,175
5,570
671
15.7%
74.2%
8.9%
2
855
3,950
0.0%
15.5%
71.7%
6
9
691
0.1%
0.2%
15.9%
9
---
---
0.2%
---
---
---
---
---
---
---
---
---
---
---
---
161-
201-
251-
200
250
300
---
---
---
---
---
---
4
---
---
0.1%
30
7
---
0.4%
0.1%
636
58
5
11.5%
1.1%
0.1%
2,916
668
55
67.0%
15.4%
1.3%
608
2,687
651
15.1%
66.9%
16.2%
4
538
2,604
0.1%
12.2%
59.0%
7
547
---
0.2%
13.8%
9
---
---
0.6%
---
---
---
301-
351-
>400
350
400
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
4
---
---
0.1%
51
6
3
1.3%
0.1%
0.1%
1,187
77
---
26.9%
1.7%
2,795
598
6
70.7%
15.1%
0.2%
530
940
48
34.7%
61.6%
3.1%
14
143
121
5.0%
51.4%
43.5%
Total
224
2,444
5,485
7,502
5,508
4,349
4,015
4,410
3,953
1,527
278
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Do you have a question about the G7 and is the answer not in the manual?
Questions and answers
Dexcom G7 continues to show readings 50 or 60 points higher than when I stick my finger and use the supplied recorder. Why?
The Dexcom G7 may show readings 50 or 60 points higher than fingerstick measurements due to several reasons:
1. Sensor's First Day: Newly inserted sensors may show larger differences, which usually decrease over the first 24 hours.
2. Pressure on Sensor: If something is pressing on the sensor (e.g., lying on it), it can affect readings. Removing the pressure can help.
3. Rapid Glucose Changes: Blood glucose changes before interstitial fluid glucose, so fast changes can cause differences between meter and sensor readings.
4. Fingerstick Issues: Inaccurate fingerstick readings can occur if hands are not washed properly or test strips are expired or used incorrectly.
These factors can cause temporary differences between Dexcom G7 and fingerstick readings.
This answer is automatically generated
How high does the Dexcom 7 reciever go?