Safety-engineered needle: 23- or 25-gauge 1-inch needle or 21- to 22-gauge 1.5-inch needle (large infant) or 23-gauge butterfly (for preemie) attached to a 3-mL syringe, sterile gloves, povidone-iodine solution, 4 × 4 gauze pads, gloves, and sterile container; transillumination light source or portable ultrasound recommended.