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5 Operation
(continued)
• If the proportion of red blood cells
(haemotocrit level) is very high (over 55%)
or very low (under 30%), this could distort
the test results.
• Studies have shown that electromagnetic
fields can affect the test results.
Do not perform tests in the immediate
vicinity of devices that could emit strong
electromagnetic radiation (e.g. microwaves
or other active mobile wireless devices).
5.2.11 Symptoms of high or low blood
glucose
To understand test results and make the right decision if
the results seem unusual, it can be useful to be familiar
with the symptoms of high and low blood glucose.
The most frequent symptoms are:
For "hyperglycaemia"
i.e. over 240 mg/dL (13.3 mmol/L)
Symptoms:
Signs of tiredness, increased appetite or thirst, frequent
passing of water, vomiting, headaches, generally feeling
unwell or nausea.
What to do:
• If you notice one of these symptoms, perform a blood
glucose test.
• If the test result is over 240 mg/dL (13.3 mmol/L) and
you show symptoms of high blood glucose, consult
your doctor without delay.
42
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