# A nurse is caring for a 30-year-old client with empyema who has just had a chest tube inserted into the right pleural space, connected to a water-seal drainage system. Which nursing intervention is the priority? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=541315 > language: ko > subject: Adult Health ## 문제 A nurse is caring for a 30-year-old client with empyema who has just had a chest tube inserted into the right pleural space, connected to a water-seal drainage system. Which nursing intervention is the priority? A 45-year-old client with empyema has just returned from having a chest tube inserted into the right pleural space. The chest tube is connected to a water-seal drainage system. ## 보기 1. Encourage deep breathing and coughing exercises every 2 hours 2. Monitor chest tube drainage for color, consistency, and amount 3. Administer prescribed antibiotics on schedule 4. Ensure the chest tube drainage system remains below the level of the chest **✔ 정답** **정답: 4** ## 해설 Keeping the chest tube drainage system below chest level prevents backflow of infected fluid into the pleural space, which could worsen infection and respiratory function. Other interventions like monitoring drainage or administering antibiotics are important but secondary. ## 심화 해설 Understanding the Priority: Airway, Breathing, and the Integrity of the Water-Seal System For a client with empyema who has just undergone chest tube insertion, all the listed interventions are important components of care. However, when prioritizing, the nurse must consider the immediate physiological risk based on the procedure just performed. The chest tube and water-seal drainage system function to drain infected fluid or air from the pleural space and, critically, to restore negative intrapleural pressure. This negative pressure is essential for lung re-expansion and normal breathing mechanics. The water-seal chamber acts as a one-way valve, allowing air and fluid to exit the pleural space while preventing atmospheric air from being drawn back in, which would cause a tension pneumothorax—a life-threatening emergency. The highest priority immediately after insertion is to ensure the physical integrity and proper function of this closed drainage system. If the drainage system is accidentally raised above the level of the chest, fluid from the system can flow back into the pleural space due to gravity. This not only introduces a risk of infection but, more immediately, can disrupt the water-seal mechanism and introduce air, leading to a pneumothorax. The principle of gravity-dependent drainage is fundamental to the physics of the system [3]. The water seal chamber must remain upright and below the chest to maintain its one-way valve function. Therefore, ensuring the system remains below chest level is the priority action to prevent an immediate, life-threatening complication from the device itself. Analysis of Other Options While the other options are essential aspects of ongoing care, they address risks that are less immediately life-threatening than a tension pneumothorax from a compromised drainage system. - Option 1: Encourage deep breathing and coughing exercises every 2 hours. This intervention is vital for promoting lung expansion, mobilizing secretions, and facilitating drainage of the pleural fluid. However, it is an ongoing therapeutic measure, not the single most critical safety check required in the immediate post-insertion period. The patient’s ability to perform these exercises safely depends on a properly functioning drainage system. - Option 2: Monitor chest tube drainage for color, consistency, and amount. Ongoing assessment of the drainage is a core nursing responsibility. For a patient with empyema, the initial drainage is expected to be purulent, and monitoring helps determine the effectiveness of therapy and the need for further intervention, such as the use of fibrinolytic agents or regular flushing, a practice currently under investigation for its efficacy in complicated effusions . However, this is an assessment and monitoring function, not an action that prevents an immediate mechanical complication from the system itself. - Option 3: Administer prescribed antibiotics on schedule. Antibiotics are a cornerstone of treatment for the underlying infection in empyema. Timely administration is crucial for achieving therapeutic blood levels and combating the infection. However, this addresses the underlying disease process over hours to days, not the immediate, life-threatening safety risk posed by a malfunctioning chest drainage system in the first few moments after insertion. The immediate post-procedure period demands a focus on the stability of the life-sustaining device. Clinical Integration: The Physics of the Water-Seal System To fully grasp the priority, it is essential to understand the mechanics of the traditional water-seal system. The system, whether a traditional wet suction or a newer dry seal system, relies on a fluid column or a mechanical valve to maintain a unidirectional flow. In a traditional three-chamber system, the water-seal chamber is the critical safety component [3]. When the system is positioned below the patient’s chest, gravity assists drainage into the collection chamber, and the column of water in the water-seal chamber prevents air from entering the chest during inspiration. If the drainage unit is lifted above the chest level, the pressure gradient reverses, and fluid can siphon back into the pleural cavity, collapsing the lung and potentially introducing air. This immediate physical threat to respiratory function is why ensuring correct positioning of the drainage unit is the nurse's first priority, taking precedence over scheduled medications, ongoing assessments, or pulmonary exercises.References (research sources) - [3]Care of a Chest TubeResearch articleMerkle A, Lobo CM, Cindass R. (2026) ## 임상 시나리오 Chest Tube Drainage System PositioningImmediate Post-Insertion Priority The water-seal drainage system must always be kept upright and positioned below the level of the chest. This positioning prevents fluid backflow into the pleural space and maintains the integrity of the water seal, which acts as a one-way valve. CautionRaising the system above chest level can disrupt the water seal and cause a tension pneumothorax, a life-threatening emergency. Never clamp the tube without a specific order during transport or repositioning. ## 핵심 개념 - **Empyema** — A collection of pus in the pleural space, often requiring chest tube drainage. - **Water-Seal Drainage System** — A closed chest drainage system that uses a water-filled chamber to act as a one-way valve, allowing air/fluid out and preventing air from entering the pleural space. - **Tension Pneumothorax** — A life-threatening condition where air enters the pleural space and cannot escape, causing lung collapse and shifting of the heart and trachea. - **Gravity-Dependent Drainage** — The principle that a drainage system must be placed below the insertion site to allow fluid to drain out by gravity and prevent backflow. ## 같은 주제 문제 - [A nurse is assessing a 58-year-old patient with a 2-week history of worsening chest pain, …](https://mymerci.kr/pages/nclex_q.php?qn_id=541312) - [A 45-year-old patient with a history of pneumonia is being assessed for suspected empyema.…](https://mymerci.kr/pages/nclex_q.php?qn_id=541313) - [A nurse is caring for a 72-year-old client with empyema who has a chest tube connected to …](https://mymerci.kr/pages/nclex_q.php?qn_id=541314) - [A nurse is caring for a client diagnosed with empyema. 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