Which device and entry point are commonly used for needle decompression in suspected tension pneumothorax?

• A. A 22-Gauge Needle In The Fourth Intercostal Space At The Anterior Axillary Line
• B. A 14-Gauge Needle Inserted In The Second Intercostal Space At The Midclavicular Line
• C. A Catheter In The Third Intercostal Space At The Posterior Axillary Line
• D. Needle Decompression Is Not Used

Answer: (B)

Needle decompression is used to rapidly relieve the built‑up air pressure in the pleural space during a suspected tension pneumothorax. The most effective approach uses a large-bore needle to vent air quickly, and it is placed in the second intercostal space along the midclavicular line, directed toward the apex and just above the upper border of the rib to avoid the neurovascular bundle. A 14‑gauge needle provides a sufficient lumen for fast decompression in an emergency. This site is favored because it gives quick access to the apical pleura and is relatively easy to locate in a patient who may be supine. The other options are less appropriate: a smaller gauge would not decompress rapidly; alternative anatomical sites or methods are not as reliable for immediate relief in the field, and needle decompression is followed by definitive chest tube placement for ongoing management.