Equipment Sterile drapes and gloves An absorbent underpad Antiseptic solution (eg, povidone iodine, chlorhexidine) with applicator sticks, cotton balls, or gauze pads Lidocaine (1% with or without epinephrine), 25-gauge needle, and 5-mL syringe For aspiration, a 5-mL syringe, 22-gauge 1.5-inch needle Sterile cup for urine specimen Washcloth for removing povidone iodine after the procedure Sterile bandage Additional Considerations The bladder should be relatively full (confirmed by physical examination and / or ultrasonography).