Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Any duplication or distribution of the information contained herein is strictly prohibited. Information developed by A. Please discuss with your doctor any questions or concerns you may have. Medical Tests. Definition Lactate dehydrogenase LDH is a protein that helps produce energy in the body.
How to Prepare for the Test No specific preparation is necessary. How the Test will Feel When the needle is inserted to draw blood, some people feel moderate pain. What Abnormal Results Mean A higher-than-normal level may indicate: Blood flow deficiency ischemia Heart attack Hemolytic anemia Infectious mononucleosis Leukemia or lymphoma Liver disease for example, hepatitis Low blood pressure Muscle injury Muscle weakness and loss of muscle tissue muscular dystrophy New abnormal tissue formation usually cancer Pancreatitis Stroke Tissue death If your LDH level is high, your provider may recommend an LDH isoenzymes test to determine the location of any tissue damage.
Risks There is little risk involved with having your blood taken. Other risks associated with having blood drawn are slight, but may include: Excessive bleeding Fainting or feeling lightheaded Multiple punctures to locate veins Hematoma blood buildup under the skin Infection a slight risk any time the skin is broken References Carty RP, Pincus MR, Sarafraz-Yazdi E.
There is very little risk to having a blood test. You may have slight pain or bruising at the spot where the needle was put in, but most symptoms go away quickly. Higher than normal LDH levels usually means you have some type of tissue damage or disease. Disorders that cause high LDH levels include:. Although the test can show if you have tissue damage or disease, it does not show where the damage is located.
If your results showed higher than normal LDH levels, your provider may need to order more tests to make a diagnosis. One of these tests may be an LDH isoenzyme test. It can help your provider find out about the location, type, and severity of tissue damage. Learn more about laboratory tests, reference ranges, and understanding results.
The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health. What is a lactate dehydrogenase LDH test? Other names: LD test, lactic dehydrogenase, lactic acid dehydrogenase. What is it used for? An LDH test is most often used to: Find out if you have tissue damage Monitor disorders that cause tissue damage.
These include anemia , liver disease , lung disease , and some types of infections. The LDH test is generally used to screen for tissue damage. This damage may be acute as in the case of a traumatic injury or chronic due to a long-term condition such as liver disease or certain types of anemia.
It also may be used to monitor progressive conditions, such as muscular dystrophy and HIV. No special preparations are needed for this test. On the day of the test, having your child wear a T-shirt or short-sleeved shirt can make things easier for the technician drawing the blood. A health professional will usually draw the blood from a vein. For an infant, the blood may be obtained by puncturing the heel with a small needle lancet.
If the blood is being drawn from a vein, the skin surface is cleaned with antiseptic, and an elastic band tourniquet is placed around the upper arm to apply pressure and cause the veins to swell with blood. A needle is inserted into a vein usually in the arm inside of the elbow or on the back of the hand and blood is withdrawn and collected in a vial or syringe.
After the procedure, the elastic band is removed. Once the blood has been collected, the needle is removed and the area is covered with cotton or a bandage to stop the bleeding. Collecting the blood for the test will only take a few minutes. Either method heel or vein withdrawal of collecting a sample of blood is only temporarily uncomfortable and can feel like a quick pinprick.
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