Test Details
Methodology
Immunochemiluminometric assay (ICMA)
Result Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Use
Measurement of CRP by high sensitivity CRP assays may add to the predictive value of other markers used to assess the risk of cardiovascular and peripheral vascular disease.2-8
Special Instructions
State patient's sex on the test request form.
Limitations
Increases in CRP values are nonspecific. CRP is an indicator for a wide range of disease processes and should not be interpreted without a complete clinical history. Recent medical events resulting in tissue injury, infections, or inflammation, which may cause elevated CRP levels, should also be considered when interpreting results. Serial analysis of CRP should not be used to monitor the effects of treatment.
Footnotes
Specimen Requirements
Specimen
Serum or plasma
Volume
1 mL
Minimum Volume
0.5 mL (Note: This volume does not allow for repeat testing.)
Container
Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube
Collection Instructions
Separate serum or plasma from cells within one hour of collection.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 7 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x3 |
Reference Range
Average hs-CRP level:1
• Low risk: <1.00 mg/L
• Average risk: 1.00−3.00 mg/L
• High risk: >3.00 mg/L
Storage Instructions
Room temperature
Causes for Rejection
Gross lipemia
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 120766 | C-Reactive Protein, Cardiac | 30522-7 | 120768 | C-Reactive Protein, Cardiac | mg/L | 30522-7 |
| Order Code | 120766 | |||||
| Order Code Name | C-Reactive Protein, Cardiac | |||||
| Order Loinc | 30522-7 | |||||
| Result Code | 120768 | |||||
| Result Code Name | C-Reactive Protein, Cardiac | |||||
| UofM | mg/L | |||||
| Result LOINC | 30522-7 |