9 days
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
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Targeted amino acid test to assess for nonketotic hyperglycinemia. Useful in neonates with unexplained seizures.
Plasma AND CSF
0.5 mL plasma and 0.5 mL CSF
Preferred: Frozen Plasma from green-top (sodium heparin) tube and CSF: plastic transport tube, no preservative. Acceptable: Frozen Plasma from green-top (lithium heparin) tube, frozen Plasma from lavender-top (EDTA) tube or frozen Plasma from PPT™. Frozen Serum from Serum separator tube (SST) or frozen Serum from red-top tube will not be rejected. Note: Plasma reference ranges will be applied to all specimen types.
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Strictly frozen, requires own sample container
| Temperature | Period |
|---|---|
| Frozen | 14 days |