Final answer:
In Z-track injections, the overlying skin is pulled laterally to prevent medication leakage into subcutaneous tissue.
Step-by-step explanation:
When giving a Z-track injection, the overlying skin is pulled laterally. This technique is used to minimize leakage of the medication into the subcutaneous tissue, which can occur with intramuscular injections. By pulling the skin to the side (laterally), a 'Z-track' is created upon release, which helps to seal the medication in the muscle, preventing it from seeping into the subcutaneous tissue. This means that the injection site is displaced or moved in the horizontal direction, to the left or right side of the body. Lateral displacement helps create a zigzag or z-shaped pathway for the needle, reducing the risk of medication leakage and ensuring proper absorption.