Phlebotomy第 66 / 100 题
A serum separator tube (SST), often gold or tiger-topped, contains which components?
a.An anticoagulant to prevent clotting
b.A clot activator and a gel separator
c.Sodium fluoride to preserve glucose
d.EDTA for hematology testing
解析
An SST contains a clot activator to speed clotting and a thixotropic gel that forms a barrier between serum and cells after centrifugation. This yields a clean serum sample for many chemistry and serology tests. It is inverted five times after collection and allowed to clot before spinning.
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