This blood test measures an enzyme called creatine kinase (CK) or creatine phosphokinase (CPK). Enzymes are chemicals that help the cells of your child’s body work. Muscle cells make the creatine kinase enzyme. When muscle cells are injured or diseased, enzymes leak out of the cells and enter the bloodstream.
This test is also called a total CK test.
The CK test may be done to check for muscle injury or disease. Other blood tests may be needed to find out exactly what the problem is.
The test may be done to:
Having this test will take just a few minutes. For young babies, the heel is pricked and a small amount of the blood is taken. For older children, a small amount of blood is taken from a vein in the arm with a needle. The blood is collected in tubes and sent to a lab.
Ask your child’s healthcare provider when and how you will get the result of your child’s test.
Some of the reasons your child’s CK level may be higher than normal are:
If your child’s CK level is high, the test may be repeated often to see if the level is decreasing.
Test results are only one part of a larger picture that takes into account your child’s medical history, physical exam, and current health. Sometimes a test needs to be repeated to check the first result. Talk to your child’s healthcare provider about the results and ask questions, such as: