Direct Radioimmunoassay (RIA)
Adults-Males: 4.0-8.0 pg.mL; Females 2.0-10.0 pg/mL
Patient should not be on any Steroid, ACTH, Gonadotropin, or Estrogen medications, if possible, for at least 48 hours prior to collection.
9 - 13 days
Collect specimen in Red top or SST tube. Spin and aliquot serum IMMEDIATELY into a screw capped plastic tube. Send to Specimen Processing frozen
Test sent to Mayo Clinic Laboratories; performed by Interscience Institute