State patient's sex on the test request form.
1 - 2 days
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.
For more information, please view the literature below.
Spanning the Continuum of Cardiovascular Care
Serum (preferred) or plasma
2 mL
Red-top tube, gel-barrier tube, green-top (heparin) tube, or lavender-top (EDTA) tube
Separate serum or plasma from cells. Transfer specimen to a plastic transport tube.
Maintain specimen at room temperature.
Temperature
Period
Room temperature
14 days
Refrigerated
Frozen
Freeze/thaw cycles
Stable x3
Patient must be fasting 12 to 14 hours.
Specimen from nonfasting patient
Apo A-1 comprises 60% to 70% of the protein content of HDL. Apo A-1 serves as an activator of LCAT which is involved in the transport of cholesterol from peripheral tissues to the liver where it is degraded. Decreased serum HDL cholesterol levels have been reported to correlate with increased risk of coronary artery disease (CAD); however, Apo A-1 has been suggested as a better discrimination of CAD than HDL.1 Apo A-1 levels also correlate with survival rates or risk factors for patients with myocardial infarction and peripheral vascular disease. Measurement of Apo A-1 may also aid in the diagnosis of Tangier disease (absence of alpha-lipoprotein).
Immunologic
See table.
Male (mg/dL)
0 to 14 d
62-91
15 d to 11 m
53-175
1 to 5 y
80-164
6 to 12 y
107-175
>12 y
101-178
Female (mg/dL)
71-97
6 to 80 y
116-209
>80 y
114-214
