See question above. Dear Rabbi. My father L’A is about to have an brain operation to remove a tumor and it is programmed to take place on the Monday before Purim. He won’t be able to hear the Megilah on Purim. Can he hear it on the Sunday before (Purim this year is on Tuesday) with a brocho?

Shulchan Aruch (ibid) rules that it could be read before Purim without a brocho. Mishna Berura (20) mentions that he should gather a minyan.