Equipment Sterile procedure, barrier protection Antiseptic solution (eg, chlorhexidine, povidone-iodine) Sterile drapes, towels Sterile head caps, masks, gowns, gloves Face shields Radial artery cannulation Arm board, gauze roll, and tape Local anesthetic (eg, 1% lidocaine without epinephrine, 25-gauge needle, 3-mL syringe) Sterile gauze (eg, 10 cm × 10 cm squares) 3-mL and 5-mL syringes Cannulation device (eg, integrated catheter and guidewire device; separate needle, guidewire and catheter; or peripheral venous angiocatheter [catheter-over-needle], 20 or 22 gauge) Blood pressure monitor; IV saline bag (500 mL), pressure bag, and hanger; integrated arterial pressure line or individual components (ie, pressure transducer, arterial line tubing [noncompliant pressure tubing], 3-way stopcocks) Nonabsorbable suture (eg, 3 - 0 or 4 - 0 nylon or silk) Chlorhexidine patch, transparent occlusive dressing An assistant or two is helpful.