All<unk> es are not preventable.  A few like hepatic, metabolic, hypoxic are preventable. Early determination of these conditions is very important in terms of morbidity/mortality and cost of the treatment.
Encephalopathy prevention
Coronary heart disease prevention
Central pontine myelinolysis prevention
Pneumonia prevention
Drug induced liver injury prevention
Stroke ischemic treatment
Venous thromboembolism prevention
Experimental cancer treatment