The 20-year-old patient with asthma presents to the emergency department with increased work of breathing and severe wheezing after exposure to household dust and mold. The patient used the albuterol inhaler 6 times in the previous 4 hours with minimal relief. Upon inspection, the nurse notes extensive accessory respiratory muscle use with moderate supraclavicular retractions and nasal flaring. The nurse auscultates expiratory wheezing in all lung fields. The patient is afebrile, normotensive, significantly tachypneic, and mildly tachycardic. The nurse anticipates which findings on a chest x-ray?

The nurse reviews the patient’s chart and notes a positive sickle-turbidity test. Which statement does the nurse make to the patient’s parents?  

The nurse is assessing the arteriovenous fistula in the patient’s right arm; it is without thrill or bruit. Which action does the nurse take next?