- Patient Preparation
- Serum separator tube. Also acceptable: Plasma separator tube, pink (K2EDTA), or green (lithium heparin).
- Specimen Preparation
- Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.3 mL)
- Storage/Transport Temperature
- Unacceptable Conditions
- Hemolyzed specimens.
- After separation from cells: Ambient: 11 days; Refrigerated: 2 months; Frozen: 1 year
CRP is a nonspecific marker of inflammation and a variety of conditions other than atherosclerosis may cause elevated concentrations. If the first result is greater than 3.0 mg/L, recommend repeating test at least 2 weeks later in a metabolically stable state, free of infection or acute illness. The lower of the two results should be used to determine the patient's risk.
Significantly decreased CRP values may result in specimens from patients treated with carboxypenicillins.
|hs-CRP results are used to assign risk as follows (Clin Chem 2009; 55:378-84):|
|Less than 1.0 mg/L|
Greater than 9.9 mg/L
Very high risk
|Component Test Code*||Component Chart Name||LOINC|
|0050182||CRP, High Sensitivity||30522-7|
- C Reactive Protein, Cardiac
- C Reactive Protein, High Sensitivity
- C-Reactive Prot, High Sens, Serum
- C-Reactive Protein, Cardio
- C-Reactive Protein, Sensitive
- Cardio C-Reactive Protein
- CRP Cardiac
- CRP High Sensitivity
- CRP, High Sensitivity
- High Sensitivity, CRP
- High-sensitivity CRP
- Ultra-sensitive CRP