acid ingestion has no direct relation now
his problem is not due to acid but due to damage done to body by acid only.
his gastric tract has been damage a lot
so u need to take opinion of gastrologist which i think is there in ur hospital also
his treatment is on right tract
he has ulcer problem now
depend upon extent and severity it take time up to six month .
there is no use of any antidote or saline wash.
is not good for the patient