Repeat Testing
Be careful to apply the procedure described in step 1-6 correctly when collecting
capillary blood for hemoglobin measurements.
The most common causes for erroneous results are choice of an unsuitable size
or type of lancet, incorrect capillary sampling technique, restricted capillary blood
flow, or the presence of tissue fluid in the sample after pressing the fingertip too
hard. These factors commonly affect the result.
Confirmation of an unexpected or unacceptable result can exclude sampling
mistakes as the cause. As the DiaSpect method is very fast, this confirmatory test
can probably be done using the same incision. Further drops following the 4
th
drop
may be used for testing as long as there is still a free flow of blood.
If the blood flow has decreased or stopped, another incision should be made for
the confirming sample. Repeat the procedure described in steps 1-6 and record
all results from repeated sampling, including relevant information about the
reason for retesting.
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