Which of the following is required during injection procedures?

During injection procedures, having the correct syringe and needle is essential. The syringe must be appropriately sized for the volume of medication being administered, while the needle must be suitable for the type of injection (intramuscular, subcutaneous, or intravenous) and the patient's age, size, and thickness of skin. Using the correct equipment ensures that the medication is delivered safely and effectively, minimizing the risk of complications such as improper dosing, pain, or injury to blood vessels or nerves.

Other items like alcohol swabs and adhesive bandages are important for preparing the skin and caring for the injection site after the procedure, but they do not replace the necessity for the right syringe and needle, which are crucial for performing the injection itself. Without the proper syringe and needle, the entire procedure could be compromised, leading to potentially dangerous outcomes for the patient.