A newly diagnosed 8-year-old child with type I diabetes mellitus and his mother are receiving diabetes education prior to discharge. The physician has prescribed Glucagon for emergency use. The mother asks the purpose of this medication. Which of the following statements by the nurse is correct?

A. These symptoms are more indicative of a respiratory infection, such as sinusitis or pneumonia.
B. These symptoms are more suggestive of a respiratory obstruction, such as croup or epiglottitis.
C. These symptoms are characteristic of sinusitis.
D. Acute pharyngitis often presents with a red and inflamed pharyngeal membrane (throat), along with fever.

A. Auscultating breath sounds can provide valuable information about the presence of wheezing, crackles, or diminished breath sounds, which may indicate respiratory issues. However, while this assessment is important for understanding the underlying cause of dyspnea, it does not directly measure the patient's oxygenation status.
B. Observing chest expansion can help the nurse assess the mechanics of breathing and whether there are any restrictions in lung expansion. While this assessment is useful, it does not provide a clear indication of the patient's oxygen saturation levels or immediate need for supplemental oxygen.
C. Measuring capillary refill can give insights into peripheral perfusion and circulation, which can be affected by oxygenation. However, it is not the most direct or specific assessment for determining the need for supplemental oxygen in a patient with dyspnea.
D. Measuring oxygen saturation (using a pulse oximeter) provides a direct and objective assessment of the patient's oxygenation status. Normal oxygen saturation levels typically range from 95% to 100%. If the oxygen saturation is below the acceptable range (usually less than 92% in many clinical settings), this would indicate the need for supplemental oxygen.