Does receiving IVIG confound the result of SPEP and/or UPEP?

IVIG being a product of polyclonal immunoglobulins may ‘produce’ a monoclonal spike if the AUC is falsely calculated by the reader. IFE usually shows polyclonal banding but every now and then a monoclonal band is picked up. Being an IgG molecule with a 21 day halflife; and with the assumption that i...

Checking for IgG antibodies while on IVIg can give false positives. Hep C antibodies, ANA, and related results are often misinterpreted when drawn on IVIg. Waiting at least 6 weeks would be the optimal.

Also, sed rates will be very elevated with IVIG. Generally, it is best to do as much of your auto...