* Lactate Dehydrogenase Mnemonic LDH Synonym LDH - LD - L-Lactate: NAD+ oxidoreductase 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). Preferably, separate serum or plasma from cells before transport. It is better to not refrigerate or freeze specimen, but to hold at room temperature (18-26°C) with analysis done ASAP. Preferred Volume 1.0 mL Serum/Plasma Minimum Volume 0.25 mL Serum/Plasma, (0.60 mL minimum whole blood draw) Transport INPATIENTS: Room temperature (18-26°C), run specimen immediately; OUTPATIENTS: Refrigerated (2-8°C) Rejection Criteria Hemolyzed specimens Stability AFTER SEPARATION FROM CELLS: Room Temperature (18-26°C): 7 days; Refrigerated (2-8°C): 4 days; Frozen (≤ -20°C): 14 days 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 83615 Last Updated: Wednesday, February 3, 2021 01:28:36 AM Client Services: 503-413-1234