A 45-year-old construction worker is brought to the emergency department after falling from scaffolding and landing on his left side. He presents with severe left-sided chest pain, shortness of breath, and decreased breath sounds on the left side. Chest X-ray reveals a pneumothorax with 40% lung collapse. What is the priority nursing intervention?

A pneumothorax with 40% lung collapse and respiratory distress requires immediate chest tube insertion to re-expand the lung and prevent tension pneumothorax. Other options are supportive but not definitive for this significant collapse.

Understanding the Clinical Scenario
This patient presents with a traumatic pneumothorax following a fall, evidenced by severe chest pain, shortness of breath, decreased breath sounds, and a chest X-ray showing 40% lung collapse. In the context of trauma, the underlying pathophysiology involves a disruption of the pleural integrity, allowing air to enter the pleural space. This accumulation of air increases intrapleural pressure, compresses the lung, and prevents effective ventilation. A collapse of this magnitude is significant and constitutes a medical emergency requiring immediate intervention to re-expand the lung and restore normal intrathoracic pressure dynamics [3,4].

Priority Intervention and Rationale
The priority nursing intervention is to prepare for immediate chest tube insertion (tube thoracostomy). The core principle in managing a large, symptomatic pneumothorax is the prompt evacuation of air from the pleural space. While administering oxygen is a critical supportive measure, it does not address the root cause of the respiratory compromise, which is the mechanical compression of the lung by the trapped air [2,3]. The systematic review and meta-analysis by Alsaigh et al. confirms that intercostal tube drainage is a definitive and effective primary management strategy for achieving lung re-expansion ^[3]. The case report by Aldemir similarly illustrates that in a scenario of acute, symptomatic pneumothorax, emergent tube thoracostomy leads to immediate lung re-expansion and symptom relief ^[2]. As a nurse, your role is to anticipate this procedure by gathering the necessary equipment (chest tube tray, drainage system, local anesthetic), positioning the patient, and providing psychological support, thereby facilitating a rapid and life-saving intervention.

Why Other Options Are Not the Priority
- Administering high-flow oxygen is an essential and immediate nursing action for any patient with respiratory distress and should be initiated concurrently. However, it is a supportive measure that increases the partial pressure of oxygen in the alveoli and can help reabsorb nitrogen from the pleural space in a small pneumothorax, but it will not mechanically re-expand a lung that is 40% collapsed due to a large volume of trapped air. The definitive treatment for a large traumatic pneumothorax is air evacuation, making preparation for this procedure the priority over supportive oxygen therapy alone [2,4].
- Positioning the patient in Trendelenburg position is contraindicated. This head-down position would shift abdominal contents upward against the diaphragm, further restricting lung expansion and exacerbating respiratory distress. The optimal position to facilitate breathing and prepare for a chest tube insertion is typically upright or semi-Fowler's.
- Obtaining an arterial blood gas (ABG) analysis provides valuable information about oxygenation, ventilation, and acid-base status. However, in an acute emergency with a clear clinical and radiographic diagnosis, performing an ABG analysis delays a critical, time-sensitive intervention. The prehospital study by Occelli et al. emphasizes the importance of timely diagnosis and management, specifically noting that clinical signs should prompt early thoracic decompression without waiting for additional diagnostic procedures that do not change the immediate need for intervention . The clinical presentation and chest X-ray provide sufficient data to proceed with the definitive treatment.