How is it treated?
When ketoacidosis is severe, it must be treated in the hospital, often in an intensive care unit. Treatment involves giving insulin and fluids through your vein and closely watching certain chemicals in your blood (electrolytes). The doctors and nurses will watch you closely to be sure that your brain does not swell as the fluids treat your dehydration.
It can take several days for your blood sugar level to return to a target range.
Source: http://www.webmd.com