Apolipoprotein B/A Ratio
Also known as: APO B/A
Use
The Apolipoprotein B/A Ratio test is used as a secondary cardiovascular risk screen for specific populations. It provides an estimate of the risk for major adverse cardiovascular events in adults by measuring the ratio of apolipoprotein B to apolipoprotein A. This ratio is useful in evaluating cardiovascular health and risk, particularly when traditional lipid panel assessments may not be sufficient to assess a patient's risk profile.
Special Instructions
A fasting specimen is recommended for accurate results. The test is performed every day of the week and is reported within 24 hours of conducting the test. Keep specimen refrigerated during transport to maintain stability.
Limitations
The Apolipoprotein B/A Ratio test, being reliant on serum or plasma measurements, may be affected by factors that influence these protein levels. Additionally, patient compliance with fasting requirements is crucial for accurate measurement. The test does not replace comprehensive lipid profiling but serves as an adjunct in specific risk assessment scenarios. Interpretation of the results should consider potential biological variability and the clinical context of the patient.
New York Approved
Methodology
Immunoassay
Biomarkers
LOINC Codes
- 1874-7
- 1871-3
- 1869-7
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
ARUP standard transport tube
Collection Instructions
Collect using a serum separator tube. Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection.
Patient Preparation
Fasting specimen recommended.
Storage Instructions
Store refrigerated.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 24 hours |
| Refrigerated | 8 days |
| Frozen | 2 months |