Caffeine
Abbrev Code: | CAF | ||
Order Code: | LAB1217 | Order Name: | Caffeine, Serum or Plasma |
Methodology: | Quantitative enzyme multiplied immunoassay technique | ||
CPT Codes: | 80155 x1, 8015501 x1 | ||
Turnaround Time: | Specimens are sent to the reference laboratory Sun-Sat; results are reported within 1-5 days. | ||
Compliance: | This test uses an in vitro diagnostic (IVD) that has been cleared or approved by the FDA. |
Collection Instructions
Specimen: | Blood |
Optimal Volume: | 1 mL |
Minimum\Peds Volume: | 0.6 mL |
Container: | Red (no gel) Alternate Containers: Purple (EDTA) |
Collection Instructions: | Usual sampling time is immediately prior to next dose (trough). |
Causes for Rejection: | Citrated plasma; collected in a gel tube. |
Processing and Shipping
Specimen Processing: | Centrifuge and separate from cells ASAP or within 6 hours of collection. Aliquot 0.5 mL, 0.2 mL minimum serum or plasma. Store in refrigerator. |
Shipping Instructions: | Ship at refrigerated temperature. |
Stability: | 1 week at room temperature or refrigerated; 2 months frozen. |
Test Performed at or Referral Lab | Lab Sendouts (ARUP) |
Referral Lab number: | 2011603 |
Interpretive
Critical Range: | Toxic Level: >20 μg/mL.
Toxic concentrations may cause tremor, cardiac abnormalities and seizures. |
Therapeutic Range: | 0-28 days: 8-20 μg/mL
29 days & older: ≤20 μg/mL (not well established) |
Use: | Therapeutic monitoring for patients receiving caffeine therapy. |
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