Keytones result from high blood sugar and from the utilization of fat for energy. My daughter has only registered keytones twice, once when we were flying and she slept thru a meal time even tho her blood sugar was low, she was obviously burning fat rather than calories (due to lack of insulin and lack of food intake). Another time she was vomiting so she wasn't eating much and got some keytones.
(Not a Doc)
Ketones are usually the result of very high blood sugar in diabetics. Get your blood sugar levels under control and you should be ok.
If ketones are trace to small: it is usually recommended to drink lots of sugar free fluids and check for ketones every few hours. (Some doctors suggest a small dose of fast acting insulin- check with your doctor)
If ketones are moderate to large; it is usually recommended to contact your doctor to see how much short acting insulin to take (some doctors have a sliding scale on how much to give) Continue to drink lots of fluids.
If a person has moderate to large ketone they have a condition called Ketonacidosis may be developing, this could be accompanied by vomiting and if severe coma.
We ususally start out by giving our daughter extra fluids, we do have a sliding scale from our doctor on how much extra insulin to give her depending on the level of ketones.
I hoper this information helps,