|Collect||One 5 mL gold (SST) top tube.|
1 mL serum at 2-8ºC. Heparinized or EDTA plasma may also be used.
Centrifuge within 1 hour of collection.
Refrigerated: 14 days; Frozen: 6 months
|Notes||Patient should be fasting for 12 hours prior to collection. Specimen (plasma or serum) must be centrifuged within one hour of collection. Longer storage of whole blood samples at room temperature has been found to increase homocysteine concentration in the plasma.|
|Preferred Specimen Collection Device(s)|
0-60 years: 5.0-18.0 umol/L
Over 60 years: 5.0-20.0 umol/L