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Ketones

How It Feels

Blood test by a laboratory

The blood sample is taken from a vein in your arm. An elastic band is wrapped around your upper arm. It may feel tight. You may feel nothing at all from the needle, or you may feel a quick sting or pinch.

Blood test at home

Your finger may feel sore after pricking it for a drop of blood for the test.

Urine test

There is normally no discomfort involved with collecting a urine sample.

Risks

Blood test by a laboratory

There is very little risk of a problem from having blood drawn from a vein.

  • You may develop a small bruise at the puncture site. You can reduce the risk of bruising by keeping pressure on the site for several minutes after the needle is withdrawn.
  • In rare cases, the vein may become inflamed after the blood sample is taken. This condition is called phlebitis and is usually treated with a warm compress applied several times daily.
  • Continued bleeding can be a problem for people with bleeding disorders. Aspirin, warfarin (Coumadin), and other blood-thinning medicines can also make bleeding more likely. If you have bleeding or clotting problems, or if you take blood-thinning medicine, tell your health professional before your blood is drawn.

Blood test at home

There is very little risk of complications from testing your blood for ketones with a home blood sugar meter.

Urine test

There are no risks associated with collecting a urine sample.

Results

A ketone test checks for substances made when the body breaks down fat for energy (ketones).

Ketones

Normal:

There are no ketones in your blood or urine.

Abnormal:

Ketones are present in your blood or urine.

Blood test at home

Home blood sugar meters that also test for ketones display results on the meter's screen.

In people who have diabetes, blood ketones are expected to be lower than 0.6 mmol/L.

Urine test

Ketones are present in the urine if:

  • The test strip changes color after dipping it into the urine.
  • The urine changes color after placing the test tablet in it.

You usually compare the color of the test strip or urine to a chart to find out if ketones are present.

High values

You may have ketones if you:

  • Have poorly controlled diabetes or diabetic ketoacidosis.
  • Are on a very low-carbohydrate or high-fat diet.
  • Are starving or have an eating disorder, including disorders that result in poor nutrition such as anorexia nervosa or bulimia, alcoholism, or poisoning from drinking rubbing alcohol (isopropanol).
  • Have not eaten (fasted) for 18 hours or longer.
  • Are pregnant. Some women have low levels of ketones during pregnancy and this does not affect the fetus. But a moderate or high amount of ketones in a pregnant woman may harm the fetus and may be an indication of gestational diabetes.

The level of ketones, and not just the presence of ketones, may be important to your doctor as well. Many conditions can change ketone levels. Fasting usually causes only mild increases in the level. But ketone levels in diabetic ketoacidosis are much higher. Your doctor will discuss any significant abnormal results with you in relation to your symptoms and past health.

WebMD Medical Reference from Healthwise

Last Updated: August 15, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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If the level is below 70 or you are experiencing symptoms such as shaking, sweating or difficulty thinking, you will need to raise the number immediately. A quick solution is to eat a few pieces of hard candy or 1 tablespoon of sugar or honey. Recheck your numbers again in 15 minutes to see if the number has gone up. If not, repeat the steps above or call your doctor.

People who experience hypoglycemia several times in a week should call their health care provider. It's important to monitor your levels each day so you can make sure your numbers are within the range. If you are pregnant always consult with your health care provider.

Congratulations on taking steps to manage your health.

However, it's important to continue to track your numbers so that you can make lifestyle changes if needed. If you are pregnant always consult with your physician.

Your level is high if this reading was taken before eating. Aim for 70-130 before meals and less than 180 two hours after meals.

Even if your number is high, it's not too late for you to take control of your health and lower your blood sugar.

One of the first steps is to monitor your levels each day. If you are pregnant always consult with your physician.

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