hi my fren is an engineer...recently he had an accident.and its been more than a month he is in hospital.doctors did minor surgery ..after surgery it it seems normal ...but after a while his head started to pain and as per doctor ,,,they told that he has clot on his brain...doctor are doing their best to cure him,,but the cant remove the clot..finally the doctor want him to go for major surgery...is it safe ..he is an engineer...after surgery is there a risk for him to die ????please help me