Ace the Barron/Elsevier CCRN Challenge 2026 – Master Critical Care with Confidence!

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In an emergency, where should a needle puncture be done for decompression of a tension pneumothorax?

First intercostal space at the midclavicular line

Second intercostal space at the midclavicular line

In the event of a tension pneumothorax, decompression is crucial, and the recommended site for needle thoracostomy is the second intercostal space at the midclavicular line on the affected side. This location is chosen because it allows for the most effective access to the pleural cavity while minimizing the risk of injury to underlying structures.

At the second intercostal space, the anatomy is favorable since the intercostal vessels and nerves are located below the rib, thereby reducing the risk of vascular injury. Inserting the needle into this space ensures that you are above the third rib and targeting an area where air accumulation is most likely to occur in a tension pneumothorax.

The choice of this specific location is foundational in emergency medicine and critical care to swiftly relieve the pressure buildup in the thoracic cavity, restore respiratory mechanics, and prevent cardiovascular compromise.

Fifth intercostal space at the anterior axillary line

Fourth intercostal space at the posterior axillary line