Tyrosine and Phenylalanine
| Abbrev Code: | TYPH | ||
| Order Code: | LAB3799 | Order Name: | Tyrosine and Phenylalanine |
| Synonyms: | Phenylalanine and Tyrosine; Phenylketonuria (PKU) Testing | ||
| Methodology: | High performance ion exchange liquid chromatography | ||
| CPT Codes: | 84510 x1, 84030 x1 | ||
| Turnaround Time: | Performed Mon and Wed; results are reported the next day. | ||
| Special Instructions: | Contact the Biochemical Genetics Laboratory at 612-273-5059 to obtain a filter paper collection kit. | ||
Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2 mL |
| Minimum\Peds Volume: | 0.3 mL or blood absorbed onto filter paper |
| Container: | Green (sodium heparin, no gel) Alternate Containers: Filter paper, Green (lithium heparin, no gel), Green (lithium heparin, gel), Purple (EDTA), Red (no gel) |
Processing and Shipping
| Specimen Processing: | Centrifuge and aliquot 1 mL, 0.05 mL minimum. Store at room temperature for filter paper, store frozen for plasma or serum. |
| Shipping Instructions: | Ship dried filter paper blood spots at room temperature. Ship plasma or serum on dry ice. |
| Stability: | OUTREACH: Photocopy request form and send to Outreach office. Send original request form to BGEN lab. |
| Test Performed at or Referral Lab | UM Special Drug/Biochemical Genetics (Y) (UMMC East Bank) |
Interpretive
| Reference Range: |
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| Use: | Diagnosis of phenylketonuria (PKU) and to monitor phenylalanine and tyrosine levels in PKU patients on low phenylalanine diets. |
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