# 中心靜脈導管放置後不久，個案突然出現呼吸困難、血氧飽和度下降及新發不對稱呼吸音。請點選此示意圖中最能解釋正常肺擴張喪失的區域。

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=581182&lang=zh-tw  
> language: zh-TW  
> subject: Physiological Adaptation  
> category: PA

## 題目

中心靜脈導管放置後不久，個案突然出現呼吸困難、血氧飽和度下降及新發不對稱呼吸音。請點選此示意圖中最能解釋正常肺擴張喪失的區域。

![](https://mymerci.kr/data/nclex/hotspot/regen_20260908_2350/HSR519.svg)

## 解析

D 位於塌陷的右肺外側，但在其胸壁肋膜邊界內。

## 深入解析

快速解答
D. D 位於塌陷的右肺外側，但在其胸壁肋膜邊界內。
為何這是最佳選擇
圖中顯示的空氣聚集將臟層與壁層肋膜分開，使肺臟回縮。此位置加上術後急性呼吸變化，支持緊急評估氣胸。此圖並非診斷性放射影像，且不確立張力性生理。
臨床情境
這些觀察是虛構的教學資料。請應用所述情境；所選特徵本身不能取代完整的床邊評估。
記憶口訣
空氣位置很重要：氣道或肺內的空氣與肋膜腔內的空氣不同。
決策規則
空氣位置很重要：氣道或肺內的空氣與肋膜腔內的空氣不同。
為何其他區域不合適
A 是中央氣道，正常情況下有空氣。B 是對側肺組織。C 是中央縱膈組織。D 指出新的異常腔室，而非僅是正常含氣結構。
**來源**
- 肋膜腔空氣可導致肺塌陷及急性呼吸道症狀，包括術後。

## 重要概念

- **Pleural air separates the lung from the chest wall** — 空氣位置很重要：氣道或肺內的空氣與肋膜腔內的空氣不同。
- **Comparison with context** — A 也含有空氣，但其正常解剖腔室無法解釋新發的擴張喪失。

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