I would be very wary of anyone with a very serious condition like that heading to SXM. There is reason why anyone that needs serious medical attention that is local goes off island.. From my understanding, the French side physicians are better but in general the quality of care on SXM is not nearly what one would expect in the States and elsewhere. If they really want to go to the Caribbean, I would suggest Guadelupe or Puerto Rico. Those islands have better medical facilities than SXM.