Second ivig dose for a guillain barre patient with a poor prognosis. any possibility to help him ?

Yes, very likely: Yes, Most cases of Guillain Barre syndrome recover with time. All you have to be sure is that there is ventilatory support available if the paralysis moves up to affect the breathing. Is this patient on a Ventilator now or not? What about the legs? are they paralysed completely/or moving. We need all this info sent to us in order to guide you further.