My 65 year old mother is diagnosed with GBS AMSAN type on 8h October to 13th October 2018. One cycle of ivig given but motor power diminished. Another round given from 4th November to 9th November 2018. Sfurther detoriation after that. She is complete paralytic except eyes movement and that was not the case. On ventilator support since 2nd November. Can plasma exchange be a good option. Otherwise what treatment options we can exercise.