A client hospitalized with a pneumothorax

问题单项选择题

A client hospitalized with a pneumothorax has the following arterial blood gas (ABG) analysis: pH, 7.19; partial pressure of arterial carbon dioxide (PaCO₂), 63 mmHg; and,22 mEq/L. A chest tube was inserted and oxygen administered at 4 L/min by nasal cannula. One hour after the initiation of treatment, ABG analysis reveals: pH, 7.28; PaCO₂, 52 mmHg; and ,22 mEq/L. This change in ABG analysis indicates（）

A. respiratory alkalosis.

B. impending respiratory arrest.

C. the need for intubation.

D. improved respiratory status.

答案

参考答案：D

解析：

The original ABG analysis reveals respiratory acidosis commonly seen with a pneumothorax. After chest tube insertion, the client’s respiratory status has improved, pH is increasing toward normal, and the PaCO₂ is decreasing. ABG analysis in respiratory alkalosis shows an elevated pH and a low PaCO₂. Assessment findings are more important than ABG analysis in determining whether the client requires intubation or if respiratory arrest is imminent.