A nurse is assessing a client following the insertion of a central venous catheter. Which of the following findings indicates a pneumothorax?

Rationale: A. Irregular heart rate: An irregular heart rate can indicate various conditions, including electrolyte imbalances or arrhythmias, but it is not a specific sign of a pneumothorax. It is more commonly associated with cardiac issues. B. Itching over the incision: Itching at the incision site may be a result of an allergic reaction, irritation, or healing, but it is not a typical sign of pneumothorax. Pneumothorax symptoms are more related to respiratory and circulatory changes. C. Distended neck veins: Distended neck veins can indicate various conditions, such as heart failure or fluid overload, but it is not a classic sign of pneumothorax. A pneumothorax usually causes changes in respiratory status rather than venous distention. D. Diminished breath sounds: Diminished breath sounds are a hallmark sign of a pneumothorax. A pneumothorax occurs when air enters the pleural space, causing lung collapse. This leads to decreased lung sounds on the affected side.