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Squeezing the skin puncture site can invalidate the specimen. Vigorous squeezing may increase the proportion of the liquid part of the sample over the solid part, for instance.
Stool
a questioned specimen is evidence collected at the scene of the crime and a known specimen is something from a known person or source.
They are used to cover the specimen.
The researcher went to the laboratory to dissolve his specimen in alcohol.
As much as necessary.
Capillary Puncture
tong
When you are at the doctors office.
Bilirubin levels can be measured by blood tests
Using gravity to increase blood collection is one strategy to aid in getting a puncture specimen. Using a warm compress will also increase blood flow. Milking the digit vigorously should be avoided, as it can affect results.