PredictrPK IFX Maintenance (GI Patients) to Prometheus

Abbrev Code:XMISC   
Order Code:LAB4909Order Name:Laboratory Miscellaneous Order
Synonyms:Inflix; Renflexis; Remicade; Inflectra
CPT Codes: 84999 x1
Test Includes:Test results include current Infliximab, antibody, and albumin levels, estimated serum Infliximab levels based on current dose and interval, and pharmacokinetic guided doses and intervals.
Turnaround Time:Specimens are sent to the reference laboratory Mon-Fri; results are reported within 4-7 days of receipt.
Special Instructions:For IBD maintenance patients (treated for ≥ 14 continuous weeks) with IFX therapy. A completed requisition must accompany each sample. See Associated Links.
Must include on test requisition:
  • Date of the last/most recent infusion.
  • Total dose of the last infusion provided as total mg.
  • Interval/number of weeks anticipated between the last infusion and the next upcoming infusion.
  • Patient's weight in kg
Associated Links:

Prometheus Test Requisition

Collection Instructions

Optimal Volume:4 mL
Minimum\Peds Volume:1.2 mL
Container:Red or gold (gel)
Alternate Containers: Red (no gel)
Causes for Rejection:Frozen samples.

Processing and Shipping

Specimen Processing:Allow sample to clot upright for 30 minutes at room temperature. Centrifuge and aliquot 2 mL, 1 mL minimum.
Shipping Instructions:Ship samples overnight at room temperature or refrigerated temperature. Protect from temperature extremes.
Stability:14 days at room temperature or refrigerated.
Test Performed at or Referral Lab Lab Sendouts  (Prometheus Laboratories, Inc.)
Referral Lab number:3400


Reference Range:By report.

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