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Register NowFatty Acids, Free (Nonester) (081893)
Create a Free Account to View PricesTurnaround Time: 4 - 6 days
CPT Code: 82725
Test Type: 1 mL Serum, frozen
Stability Time:
|
Temperature |
Period |
|---|---|
|
Room temperature |
4 hours |
|
Refrigerated |
1 day |
|
Frozen |
105 days |
|
Freeze/thaw cycles |
Stable x6 |
Reference Range:
|
Age |
Male (mEq/L) |
Female (mEq/L) |
|---|---|---|
|
0 to 30 d |
0.0−0.8 |
0.0−0.8 |
|
1 to 6 m |
0.0−0.9 |
0.0−1.1 |
|
7 m to 1 y |
0.1−2.2 |
0.2−1.9 |
|
2 to 5 y |
0.2−2.3 |
0.1−2.8 |
|
6 to 12 y |
0.0−1.2 |
0.0−1.2 |
|
13 to 30 y |
0.0−0.8 |
0.0−1.0 |
|
31 to 70 y |
0.1−0.9 |
0.1−1.1 |
|
71 to 80 y |
0.2−0.7 |
0.1−1.1 |
|
>80 y |
0.1−0.9 |
0.1−0.9 |
Overview:
Knowledge of the level of nonesterified fatty acids (NEFA) in blood plasma can be helpful in the diagnosis and management of certain diseases and disorders of metabolism and in the evaluation of prospective causes of hyperlipoproteinemia. A disorder of disease that causes excessive release of a lipoactive hormone (epinephrine, ACTH, GH, etc) can induce an elevation of blood level of fatty acids. A sustained release of fatty acids from adipose cells in excess of energy needs can contribute to the development of secondary hyperlipoproteinemia.
Collection Details:
Patient Preparation:
Sample should be collected in the early morning after a 12-hour fast. Blood for the NEFA procedure should be collected after an overnight fast because the level of circulating nonesterified fatty acids is strongly influenced by food ingestion. If the patient has not properly fasted, the determined level of NEFA will be elevated and not directly comparable to a normal range derived from fasting normal controls.
Collection Instructions:
Red-top tube or gel-barrier tube.
After clotting, separate serum and freeze immediately following centrifugation. Serum is the specimen of choice. Heparin must not be used nor should the patient be on heparin therapy. The NEFA level in serum will increase as it remains at room temperature. Transfer specimen to a plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Freeze. The level of NEFA will increase in serum as it is allowed to stand at room temperature due to enzymatic action.