What specific technique is used for assessing and managing a tension pneumothorax?

Needle decompression is the correct technique used for assessing and managing a tension pneumothorax because it provides immediate relief of pressure in the pleural space. A tension pneumothorax occurs when air enters the pleural space and cannot escape, leading to increased pressure that collapses the lung on the affected side and pushes the mediastinum toward the opposite side, compromising cardiovascular function.

By inserting a large-bore needle, typically in the second intercostal space at the midclavicular line, healthcare providers can quickly relieve the pressure. This intervention can be life-saving, as it allows the lung to re-expand and restores hemodynamic stability.

Other techniques mentioned, such as chest x-ray, while useful in diagnosis and confirming the presence of a tension pneumothorax, do not provide a therapeutic intervention. Standard CPR techniques focus on providing cardiovascular support and are not specifically for managing pneumothorax. Abdominal compression is unrelated to the management of pulmonary conditions and would not be appropriate in this context.