The nurse is obtaining a client's fingerstick glucose level. After gently milking the client's finger, the nurse observes that the distal tip of the finger appears reddened and engorged. Which action should the nurse take?

A. The patient’s oxygen saturation remains below the target of 94% despite initial oxygen therapy. Therefore, increasing the oxygen flow might be necessary to achieve better oxygenation.

B. Since the patient remains symptomatic with ongoing wheezes, administering another dose of the nebulizer treatment as ordered, since the prescription included PRN can help to further open the airways and alleviate wheezing.

C. Elevating the head of the bed can help improve lung expansion and ease the work of breathing, which is particularly beneficial in respiratory distress situations.

D. Switching to a nonrebreather mask may be appropriate if the patient’s oxygen saturation does not improve sufficiently with the current method of oxygen delivery. This type of mask can deliver a higher concentration of oxygen.

E. While incentive spirometry is generally used for preventing pulmonary complications (such as pneumonia or atelectasis) after surgery or in conditions where patients are likely to be immobile, it may not be immediately beneficial or a priority in the acute management of an asthma attack. The primary focus should be on stabilizing the patient’s respiratory status through medication and oxygen therapy. Thus, this option is less critical at this stage.

F. Continuous monitoring of vital signs is crucial in acute cases like this to assess the patient's response to interventions and detect any deterioration in the clinical status.

The rationale for selecting impaired gas exchange is based on the clinical manifestations presented by the client. The client's difficulty in breathing, the need to pause to catch breath, the ineffectiveness of the rescue inhaler, and the expressed feeling of nervousness during episodes are indicative of a compromised gas exchange. This is further supported by the objective data: an oxygen saturation of 88% on room air is below normal levels, suggesting that the client is not receiving adequate oxygen. Expiratory wheezes indicate an obstruction of airflow, commonly seen in asthma attacks, which can impair gas exchange. Therefore, the nurse's assessment and the client's symptoms align with the diagnosis of impaired gas exchange, necessitating immediate intervention to improve the client's respiratory function.