How is it used?
Blood ketones are primarily used to screen for, detect, and monitor diabetic
ketoacidosis (DKA) in people with type 1 and sometimes type 2
diabetes. DKA can occur when a diabetic’s blood sugar is significantly increased, with illness, severe infection,
pregnancy, and a variety of other conditions.
DKA is associated with acute hyperglycemia, a severe insulin deficiency, and a disruption of the body’s acid-base balance. Excess ketones and glucose are dumped into the urine by the kidneys in an effort to flush them from the body. This causes increased urination, thirst, dehydration, and a loss of electrolytes. The affected person may also experience symptoms such as rapid breathing, shortness of breath, a fruit-scent to the breath, nausea, vomiting, fatigue, confusion, and eventually coma.
Ketosis and ketoacidosis may also be seen with starvation, alcoholism, and with high-fat low-carbohydrate diets. It may be induced on purpose in some children with epilepsy who have frequent seizures and do not respond to available medications or other treatments.
Blood ketones are sometimes used, along with other tests such as blood gases, glucose, and electrolytes to detect ketoacidosis in non-diabetics if they have signs and symptoms of DKA due to, for example, ingestion of excessive amounts of alcohol.
^ Back to top
When is it ordered?
Blood ketone tests may be ordered when a diabetic has symptoms associated with DKA and may also be performed whenever there is the potential for DKA to develop, such as when a diabetic is sick or pregnant. With the availability of home monitoring, blood ketones can be ordered as frequently as the doctor recommends. Some
signs and
symptoms of
ketoacidosis include:
- increased urination, excessive thirst
- dehydration, loss of electrolytes
- rapid breathing, shortness of breath
- a fruit-scent to the breath
- nausea, vomiting
- fatigue
- confusion
- sometimes coma
In non-diabetics, blood ketones are usually ordered when the patient has symptoms associated with ketosis or ketoacidosis.
^ Back to top
What does the test result mean?
If blood ketone concentrations are increased, then the person has some degree of ketosis or
ketoacidosis. If concentrations are low or normal, then the person either does not have excess ketone production or the ketone body that is elevated is not being detected by the test method used.
^ Back to top
Is there anything else I should know?
Recent studies have shown that serum ketones and beta-hydroxybutyrate testing are both effective in diagnosing diabetic ketoacidosis. Some doctors prefer beta-hydroxybutyrate, but it is not available in all laboratories.
^ Back to top