» LEARN MORE ABOUT COVID-19 VACCINES, TESTING, VISITOR & SAFETY REQUIREMENTS

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* Creatinine, Serum or Plasma

Mnemonic

CR

Synonym

Serum Creatinine

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 or plasma from cells within four hours of collection.

Preferred Volume

1.0 mL Serum/Plasma

Minimum Volume

0.25 mL Serum/Plasma (0.60 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): 6 months

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Colorimetry

Reference Values

Reference Values

Critical Values

CPT Codes

82565

Last Updated: Wednesday, January 13, 2021 02:22:42 AM


Client Services: 503-413-1234