ARUP's Laboratory Test Directory

Homocysteine, Total : 0099869

Mnemonic: HOMOCY-QNT

Methodology: Enzymatic
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  One 5 mL green (sodium or lithium heparin) or serum separator tube.

Transport:  1 mL plasma or serum at 2-8°C. (Min: 0.5 mL)  Submit specimen in an ARUP Standard Transport Tube.

Remarks:  Fasting specimen is preferred. Plasma or serum must be separated from cells within one hour of collection.  If specimen cannot be separated from cells within one hour, store specimen on ice.

Unacceptable Conditions:  Sodium citrate.

Stability:  Ambient: 1 hour; Refrigerated: 1 week; Frozen: 3 months
Reference Interval:
< 11 µmol/L, for both male and female
Interpretive Data: Plasma total homocysteine (tHcy) is a graded risk factor for cardiovascular disease.  The risk increases progressively with homocysteine concentration.  Maintenance of homocysteine levels below 15 µmol/L is recommended.
 
Plasma Total Homocysteine graded risk factor for cardiovascular disease (Clin Chem 2009; 55:378-84):  
Less than 11 µmol/L
11-14 µmol/L
15-29 µmol/L
Greater than 29 µmol/L 		Desirable
Intermediate
High
Very High

Note:  False elevations of plasma or serum homocysteine may occur if the plasma or serum is not promptly separated from the cells at the time of collection.

This test is performed pursuant to an agreement with Competitive Technologies, Inc.
CPT Code(s): 83090
 
 

 

 

 
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