1.Elderly diabetics are prone to develop lacunar infarcts(blockade of very fine blood vessels traversing through deep seated brain tissue which are sometimes difficult to be detected even with the most sophisticated imaging modalities like MRI
2.Disturbance of electrolytes like Na+ and K+ is another possibility as she had been taking high doses of diuretics.
3.Very high or very low blood sugar
levels may lead to mental status changes.
4.Acute renal insufficiency(kidney dysfunction
) due to high blood sugar levels or liver
dysfunction may also cause altered sensorium.
5.Chronic uncontrolled high blood pressure
may also lead to changes in mentation.
Regards and best wishes
Dr RAVINDRA MATHUR