病人診斷為氣胸，置有胸管並連接抽吸引流系統。護理師發現水封瓶內的水位隨呼吸起伏。這代表什麼？
A client is diagnosed with a pneumothorax and has a chest tube connected to a suction drainage system. The nurse notes the water level in the water seal chamber fluctuates with the client's breathing. What does this indicate?
- AThe suction pressure is inadequate抽吸壓力不足
- BThe system is functioning normally (tidaling)✓ 正解系統運作正常（潮汐現象）
- CThere is a leak in the system系統有漏氣
- DThe lung has re-expanded肺部已重新擴張
胸管 (chest tube) 是一種置入胸腔以引流氣體或液體的醫療裝置，通常用於治療氣胸 (pneumothorax) 或血胸 (hemothorax)。胸管會連接到一個抽吸引流系統，其中包含一個水封瓶 (water seal chamber)。水封瓶的功能是允許氣體或液體從胸腔排出，同時防止空氣逆流進入胸腔。 水封瓶內水柱的波動，稱為「起伏 (tidaling)」，是胸管引流系統功能正常的關鍵指標。當病人吸氣時，胸腔內壓力下降，水柱會上升；吐氣時，胸腔內壓力上升，水柱會下降。這種隨呼吸的規律性波動，表明胸管是暢通的，且胸腔與引流系統之間沒有漏氣，系統能夠有效感應到胸腔內的壓力變化。這是護理師在評估胸管功能時必須觀察到的正常現象，確保了病人的安全和治療效果。 其他選項所述的情況則表示系統存在問題或已達成治療目標。
Fluctuation of the water level in the water seal chamber, known as tidaling, indicates that the chest tube system is patent and functioning normally. This rhythmic change corresponds with the client's respiratory cycle, confirming that the system effectively transduces intrathoracic pressure changes without leaks or obstructions.