Infliximab Quantitation with Reflex to Antibodies to Infliximab

Specimen Container	Red top tube (To be obtained from DPLM Client Service, after office hour call extension 1383)
Specimen Requirement	Plain blood 3 mL
Specimen Storage/Transport	Spin down and separate serum within 2 hours of receiving the specimen and freeze immediately.
Orderable as Urgent?	No
Reference Value(s)	INFLIXIMAB QUANTITATION: Limit of quantitation is 1.0 mcg/mL. Therapeutic ranges are disease specific. Paediatric reference ranges are not established. INFLIXIMAB ANTIBODIES: Absence of antibodies to infliximab (ATI) is defined as <50 U/mL Presence of ATI is reported as positive when concentrations are > or = 50 U/mL
Testing Laboratory Location	NUH
Laboratory	Mayo Medical Laboratories in Rochester
Contact Number	6394 1352
Day and Time Performed	Mon - Fri: 0800 hrs to 1700 hrs Sat: 0800 hrs - 1230 hrs (Test setup every Monday, Wednesday and Thursday for INFX. Monday, Wednesday and Friday for INXAB)
Orderable on CPOE?	No
Downtime Form	Clinical Chemistry - Form A
Additional Information	For 12 hours before specimen collection do not take multivitamins or dietary supplements containing biotin (Vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.

Last Updated - 05 Apr 2025