After a cardiac catheterization, which action should the nurse take for a toddler?

Maintaining the child's affected leg in a straight position for at least 6 hours after a cardiac catheterization is crucial to prevent complications such as bleeding or hematoma formation at the catheter site. The procedure involves inserting a catheter into the blood vessels, which can lead to potential trauma to the area. By keeping the leg straight, it minimizes pressure on the insertion site and allows for proper healing, ensuring that the blood vessels can close appropriately after the catheter has been removed.

This practice aligns with standard post-procedural care for patients, especially in pediatric populations, to safeguard against any unnecessary strain on the insertion site. Encouraging mobility too soon can increase the risk of complications and should be avoided until the healthcare provider confirms that it is safe.