MH can happen as much as 36 hours after surgery!!! I have read and been taught that prophylactic dantrolene does not improve the outcomes and should not be used. The pt should definetly be monitored very closely paying close attention to CO2 as it is the first thing to go up. If MH is suspected pt should be given 100% 02 atleast 10L/min, dantrolene 2-10mg/kg (needs to be continued after started for 36 hrs given every 6hrs), may need ice packs under arm pits, under knees, around neck, and may need to give sodium bicarb in that it will cause acidosis. You will also need to start some fluids to keep the kidneys flushed in that kidney failure could develop. Also will want to watch the K level in that it will go up. If there is a pt/family hx of MH a pt can still have surgery just dont need to use volatile anesthetics or SUCC's, with this known MH alot let common.
AM I ON TRACK, what else should or should not be added