Allow SST to clot in an upright position for
at least 30 minutes, then centrifuge sample within 2 hours
of collection. Refrigerate
Alternative Specimen
2 mL serum from a plain red top tube. Allow sample to
clot in an upright position for at least 60 minutes, then
centrifuge sample and transfer serum to a plastic transport
tube within 2 hours of collection. Clearly label tube as
serum from a plain red top tube. Refrigerate.
