||Quantitative Radial Immunodiffusion
#ExistCollect>Collect: Serum separator tube.
#ExistSPECIMENPREPARATION>Specimen Preparation: Allow specimen to clot for one hour at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.3 mL) Plasma is not recommended.
#ExistSPECTRANSPORT>Storage/Transport Temperature: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
#ExistConditions>Unacceptable Conditions: Non-frozen specimens. Specimens exposed to repeated freeze/thaw cycles. Specimens left to clot at refrigerated temperature.
#ExistStability>Stability (collection to initiation of testing): After separation from cells: Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks