A nurse is caring for an infant diagnosed with Tetralogy of Fallot. The infant has been feeding poorly and has difficulty gaining weight. What actions should the nurse plan to take? (Select all that apply.)

Administer morphine via IV bolus.

Position the infant in a knee-chest position.

Perform nasopharyngeal suctioning for a maximum of 5 seconds.

Request a prescription for a diuretic.

Administer an additional dose of digoxin.

Prepare to assist with the insertion of a chest tube.