4
Precautions
• CGMS readings should only be used as a reference
for the supplemental monitoring of diabetes mellitus
and should not be used as a basis for clinical diagno-
sis.
• The CGMS should be completely removed before
Magnetic Resonance Imaging (MRI).
• The CGMS contains many small parts that can be
dangerous if swallowed.
• During rapid changes in blood glucose (more than
0.1mmol/L per minute), glucose levels measured in
interstitial uid by the CGMS may not be the same
as blood glucose levels. When blood glucose lev-
els drop rapidly, the sensor may produce a higher
reading than the blood glucose level; Conversely,
when blood glucose levels rise rapidly, the sensor
may produce a lower reading than the blood glucose
level. When experiencing symptoms of hypoglycemic
or hyperglycemic, the sensor readings are checked
by using a blood glucose meter for a ngertip blood
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