So if you prolong the dialysis just a little bit longer, you will probably do just as well as you would with hemoperfusion. The answer is no. The molecule is too big. Most drugs are around 300 molecular weight, and that is the reason that they come off with dialysis pretty well. Fab fragments are much higher than that, so they won't come off.
Fab fragments are quite appropriate if they have normal renal function or near normal.
Litovitz TL, Klein-Schwartz W, Caravati EM, Youniss J, Crouch B, Lee S. 1998 annual report of the American Association of Poison Control Centers Toxic Exposure Surveillance System. Hansen HE, Amdisen A. Lithium intoxication. Brent J, McMartin K, Phillips S, Burkhart KK, Donovan JW, Wells M, Kulig K. Fomepizole for the treatment of ethylene glycol poisoning. Methylpyrazole for Toxic Alcohols Study Group. Whitehead A. A new statistical approach to the prognostic significance of plasma paraquat concentrations.