The healthcare provider prescribes amrinone 55 mg via IV bolus to be given over 2 minutes. The available vial is labeled, amrinone 100 mg/20 mL. How many mL should the nurse administer per minute? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Calculate the total volume to administer: Total volume (mL) = Desired dose (mg) / Available concentration (mg/mL) = 55 mg / (100 mg / 20 mL) = 55 mg / 5 mg/mL = 11 mL Infusion time in minutes = 2 minutes Calculate the volume to administer per minute: Volume per minute (mL/minute) = Total volume (mL) / Infusion time (minutes) = 11 mL / 2 minutes = 5.5 mL/minute