Apolipoprotein B/A Ratio

Label Mnemonic:	APOBAR
Epic code:	LAB2610
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Commercial Mailout Laboratory
6240-8 RCP
356-8593

Specimen(s):

Serum

Collection Medium:

Red top tube 5 mL (Clot Activator)

Minimum:

Adult preferred minimum: 1 mL serum from fasting collection
Adult/Pediatric absolute minimum: 0.5 mL serum from fasting collection

Rejection Criteria:

Plasma, severely lipemic or hemolyzed specimens

Turn Around Time:

24 hours upon receipt at reference laboratory (upon receipt in laboratory)

Reference Range:

Components                 Reference Interval
Apolipoprotein, A-1        Male: 94-178 mg/dL
                           Female: 101-199 ng/dL
Apolipoprotein, B          Male: 55-140 mg/dL
                           Female: 55-125 ng/dL
Apolipoprotein B/A Ratio   No reference interval

Comments:

The ratio of Apolipoprotein B-100/Apolipoprotein A-1 can provide
relative risk factors for a reasonable approximation of coronary 
atherosclerotic risk.

Apolipoprotein B/A           Male    Female
1/2 Average Risk             0.4       0.3
Twice Average Risk           1.0       0.9
Three Times Average Risk     1.6       1.5

Methodology:

Nephelometry

CPT Code:

Apo B 82172, Apo A-1 82172

See Additional Information:
Fasting Specimen Requirements