| Methodology: |
High Performance Liquid Chromatography
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| Performed: |
Sun, Tue-Sat
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| Reported: |
2-6 days
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| Specimen Required: |
Collect: One 7 mL lavender (EDTA) or pink (K2EDTA).
Transport: 4 mL plasma, frozen. (Min: 1.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Remarks: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Centrifuge within 15 minutes of collection; remove plasma from cells and freeze immediately.
Patient Preparation: Discontinue epinephrine and epinephrine-like drugs at least one week before obtaining the specimen. The patient must refrain from using acetaminophen for 48 hours before the specimen is drawn. The patient must refrain from using caffeine, medications, and tobacco; and from drinking coffee, tea, or alcoholic beverages for at least four hours before the specimen is drawn. Collect the sample after the patient has had 15 minutes rest in a supine position. An overnight fast prior to sample collection is recommended.
Unacceptable Conditions: Grossly hemolyzed, ambient, or refrigerated specimens. Sodium citrate-preserved plasma.
Stability: After separation from cells: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month
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