Item Value
Test name Homocysteine, Total
Available Stat? No
Turn around times 1-4 days
In House Availability Wednesday and Saturday
Performed by China Basin Chemistry
Patient Preparation An 8 hour fast before specimen collection is recommended because a protein-rich meal may increase results by 15%-20%.
Normal range
Age Male & Female
5 days to <1 year 3-10 umol/L
1-11 years 3-8 umol/L
12-14 years 5-10 umol/L
15-18 years 5-13 umol/L
19-70 years 4-14 umol/L
>70 years 6-20 umol/L
Container type Light Green top on ice (Gold top on ice acceptable)
Amount to Collect 2 mL blood
Collection Instructions Chill tube on ice before collection and transport on ice to lab.

If sample is not collected on ice, release of homocysteine from erythrocytes may increase levels by approximately 10% per hour at room temperature. (Clin Chem 50:3-32, 2004)
Sample type Heparinized Plasma (serum acceptable)

If you have additional questions regarding this test, please call: 415-353-1667