Scenario Three - Diagnosis

Patient Chart

History

DM is a 20-month-old female brought into the ED by her parents because of increasing shortness of breath and cough that has worsened over the past several hours. Upon arrival, the following is noted: pulse 136, respiratory rate 40 and labored with intercostals retractions, temperature 102F. SpO2 93% on room air. An occasional ‘bark-like’ cough is noted. The parents state that DM has had what appears to be an upper respiratory infection for the past two days. Use the Auscultation tab to assess lung sounds.

Which of the following is a test that would help to confirm the diagnosis?