| Ordering Code | 4686 |
|---|---|
| Test Name | Homocysteine, Total |
| Preferred Specimen | Serum |
| Preferred Container | SST (Gold) |
| Other Specimen/Container | Serum in Plain (Red) |
| Optimum Volume | 1 mL |
| Collection Instructions | Place all specimens on ice after collection and prior to separation by centrifugation. |
| Handling Instructions | Separate blood cells from serum by centrifugation. If collected without serum separator tube, transfer serum to clean aliquot tube. |
| Transport Requirements | Oahu: Refrigerated Airline: Refrigerated |
| Specimen Stability | Refrigerated: 2 Weeks Frozen: 8 Months |
| Rejection Criteria | Insufficient quantity, Gross Hemolysis, Lipemic, Specimen older than stability limits, Wrong specimen type, Ambient temperature, Serum not separated from cells |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
| Methodology | Enzymatic |
Reference range(s)
The reference ranges listed below are valid on this date of November 5, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Homocysteine, Total | >=61Y | 5-20 | 5-20 | umol/L | |||||
| Homocysteine, Total | 0-60Y | 5-15 | 5-15 | umol/L |
