Fatty acids, free (Non-ester)

Alphabetical Test listing

Fatty acids, free (Non-ester)-994

  
Fatty acids, free (Non-ester)
  
994
  
LAB994
  
MSO
  
Free fatty acids
Nonesterified free fatty acids
  

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.

  

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.

  
Serum
  
  
1.0 mL
  
0.2 mL
  

Spin, separate and freeze immediately

  
  

Frozen (preferred) - 105 days

Freeze/thaw cycles - stable x6

Refrigerated - 1 day

Ambient - 4 hours

 

  
LabCorp Burlington (081893): R-NX
  
Tu, Th
  
4 - 6 days
  

Spectrophotometry

  

Age

Male

Female

0 – 30 days

0.0 – 0.8

0.0 – 0.8

1 – 6 months

0.0 – 0.9

0.0 – 1.1

7 months – 1 yr

0.1 – 2.2

0.2 – 1.9

2 – 5 yrs

0.2 – 2.3

0.1 – 2.8

6 – 12 yrs

0.0 – 1.2

0.0 – 1.2

13 – 30 yrs

0.0 – 0.8

0.0 – 1.0

31 – 70 yrs

0.1 – 0.9

0.1 – 1.1

71 – 80 yrs

0.2 – 0.7

0.1 – 1.1

>80 yrs

0.1 – 0.9

0.1 – 0.9

  

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.

  
82725
  
10/31/2019
  
06/03/2020