JEANETTE ENGQVIST / SCIENCE PHOTO LIBRARY JEANETTE ENGQVIST / SCIENCE PHOTO LIBRARY
Intramuscular injection. Computer illustration showing how to administer a Z-track injection into muscle tissue. A Z-track injection is used to administer drugs into large muscles in order to prevent leakage of medication into the layers of subcutaneous tissues. It is named Z-track because the techniques results in a zigzag path, causing the drug to be sealed inside the muscles.
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