Blood Test: Lactate Dehydrogenase (LDH)enparents dehydrogenase (also called lactic acid dehydrogenase, or LDH) is an enzyme found in almost all body tissues. The LDH test is generally used to screen for tissue damage.blood tests, diagnostic tests, lactate dehydrogenase, lactic acid dehydrogenase, LDH, tissue damages, LDH isoenzymes tests, medical tests, diagnosis, lactic acid, tissues, tissue damage, enzymes, body tissue, liver disease, heart attack, anemia, muscle trauma, bone fractures, cancers, meningitis, encephalitis, HIV, isoenzymes01/12/200903/19/201909/02/2019b2b93f6a-c152-4f84-8581-a27d87266862 <h3>What It Is</h3> <p>Lactate dehydrogenase (also called lactic acid dehydrogenase, or LDH) is an enzyme found in almost all body tissues. It plays an important role in cellular respiration, the process by which glucose (sugar) from food is converted into usable energy for our cells.</p> <p>Although LDH is abundant in tissue cells, blood levels of the enzyme are normally low. However, when tissues are damaged by injury or disease, they release more LDH into the bloodstream. Conditions that can cause increased LDH in the blood include liver disease, heart attack, anemia, muscle trauma, bone fractures, cancers, and infections such as meningitis, encephalitis, and HIV.</p> <p>Even though an LDH test is useful in diagnosing tissue damage, other tests are usually necessary to pinpoint the location of the damage. One such test is called the LDH isoenzymes test. LDH isoenzymes are five kinds of the LDH enzyme that are found in specific concentrations in different organs and tissues. By measuring the blood levels of these isoenzymes, doctors can get a better idea of the type, location, and severity of the cellular damage.</p> <h3>Why It's Done</h3> <p>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.</p> <h3>Preparation</h3> <p>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.</p> <h3>The Procedure</h3> <p>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.</p> <p>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.</p> <p><img class="left" src="" name="974-031609_BLOODTEST_RD7.GIF" alt="drawing_blood" title="drawing_blood" /></p> <p><img class="left" src="" name="865-103108_HEELPRICK1-2_RD4.GIF" title="heel_prick_illustration" alt="heel_prick_illustration" /></p> <h3>What to Expect</h3> <p>Either method (heel or vein withdrawal) of collecting a sample of blood is only temporarily uncomfortable and can feel like a quick pinprick. Afterward, there may be some mild bruising, which should go away in a day or so.</p> <h3>Getting the Results</h3> <p>The blood sample will be processed by a machine. The results are commonly available within a day or two.</p> <h3>Risks</h3> <p>The LDH test is considered a safe procedure. However, as with many medical tests, some problems can occur with having blood drawn, like:</p> <ul> <li>fainting or feeling lightheaded</li> <li>hematoma (blood accumulating under the skin causing a lump or bruise)</li> <li>pain associated with multiple punctures to locate a vein</li> </ul> <h3>Helping Your Child</h3> <p>Having a blood test is relatively painless. Still, many children are afraid of needles. Explaining the test in terms your child can understand might help ease some of the fear.</p> <p>Allow your child to ask the technician any questions he or she might have. Tell your child to try to relax and stay still during the procedure, as tensing muscles and moving can make it harder and more painful to draw blood. It also may help for your child to look away when the needle is being inserted into the skin.</p> <h3>If You Have Questions</h3> <p>If you have questions about the LDH test, speak with your doctor.</p> Análisis de sangre: lactato deshidrogenasa (LDH)El análisis LDH se utiliza, por lo general, para detectar si existen lesiones en el tejido. Estas lesiones pueden ser graves (como en el caso de una lesión traumática) o crónicas (causadas por una afección prolongada, como una enfermedad hepática o ciertos tipos de anemia). También puede utilizarse para controlar las afecciones progresivas, como la distrofia muscular y el VIH.
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Broken BonesMany kids will have a broken bone at some point. Here's what to expect.
EncephalitisEncephalitis is a rare brain inflammation caused by a virus. The best way to avoid encephalitis is to prevent the illnesses that may lead to it.
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HIV and AIDSParents can help prevent HIV/AIDS by learning the facts and talking with their kids regularly about healthy behaviors, feelings, and sexuality.
MeningitisMeningitis is treatable, but can be serious. So it's important to know the symptoms, and get medical care right away if you think that your child has the illness.
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