* BETA-HYDROXYBUTYRATE Mnemonic BHB Synonym Ketone body - BOHB - β-HBA Specimen Collection Requirements Collect Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red, 3.0 mL mint green (lithium heparin, PST), 4.0 mL gray (sodium flouride) top tube), or 4.0 mL lavender (EDTA) top tube Handling Allow serum to clot completely at room temperature (minimum: SST - 30 minutes and red top tubes - 60 minutes). Centrifuge and separate serum or plasma from cells within 1 hour of collection. 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): 2 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 Age BHB 0 - 11 months 1.0-10.0 mg/dL 1 - 6 years 0.9-9.4 mg/dL 7 - 14 years 0.9-3.1 mg/dL ≥15 years 0.2-2.8 mg/dL CPT Codes 82010 Last Updated: Thursday, March 14, 2019 12:50:25 PM Client Services: 503-413-1234