Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.
* This volume does not allow for repeat testing
Specimen must be centrifuged and plasma separated from cells within 24 hours of collection.
Patients taking vitamin supplements containing doses of >5 mg/day may have falsely decreased test results generated.
Because of the potential for carryover, this testing cannot be added on to previously tested specimens. A new PST specimen should be collected for any HCG or PCT order. Testing can be added to a PST specimen that has not been previously placed on an instrument for testing.
Same Day/1 to 2 days
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