* Creatine Kinase Total Mnemonic CK Synonym CK Total - CPK - Creatine Phosphokinase - Adenosine Triphosphate - Creatine N-Phosphotransferase Specimen Collection Requirements Collect Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL mint green (lithium heparin, PST) top tube View image for Supply Item Number - 101235 or 101192 Handling Allow serum to clot completely at room temperature (minimum: SST - 30 minutes and red top tubes - 60 minutes). Centrifuge and separate serum from cells ASAP. Preferred Volume 1.0 mL Serum/Plasma Minimum Volume 0.25 mL Serum/Plasma (0.6 mL minimum whole blood draw) Transport Refrigerated (2-8°C) Rejection Criteria Grossly hemolyzed specimens Stability AFTER SEPARATION FROM CELLS: Room Temperature (18-26°C): 24 hours; Refrigerated (2-8°C): 7 days; Frozen (≤ -20°C): 1 month Testing Information Performed 7 days/week Reported 24 hours Method Enzymatic Reference Values Reference Values For age related ranges see Chemistry Age Related Reference Ranges and Critical Values. CPT Codes 82550 Last Updated: Wednesday, January 13, 2021 02:13:29 AM Client Services: 503-413-1234