One hundred and thirty two episodes of diabetic non ketotic hyperosmol
ar states were studied after a prospective schedule of treatment was d
esigned. The admission data, the prognostic factors and their outcome
were analyzed. Initial high osmolarity, urea and sodium plasma levels
and low plasma pH were related to the admission level of consciousness
(p<0.01). High glucose, osmolarity, urea and sodium plasma levels at
entry were related to the admission level of dehydration (p<0.01). In
multivariate regression analysis, osmolarity was the most influential
Variable in both the level of consciousness and the admission level of
dehydration (p<0.0001). Twenty two patients died (16.9 %). Septic sho
ck was the most frequent cause of death (31 %) and mortality was highe
r in patients with cardiovascular disease (acute myocardial infarction
or stroke) as the precipitating factor for diabetic hyperosmolar stat
e (p<0.002). Older age, low blood pressure, low sodium, pH and bicarbo
nate plasma levels, and high urea plasma levels were related to mortal
ity (p<0.01). In multiple regression analysis, urea was the most influ
ential mortality risk factor (p<0.O118). Non survivors received higher
doses of insulin than survivors (p<0.01). All these data suggest that
it is not the hyperosmolarity itself, but the hemodynamical state of
the patients, which is the most influential factor on the prognosis of
a diabetic hyperosmolar state.