Final answer:
To decompress a tension pneumothorax, a 14-gauge needle is typically used to rapidly release air from the pleural space.
Step-by-step explanation:
To decompress a tension pneumothorax, a large-bore needle is typically used. The size gauge needle that is commonly used for this procedure is a 14-gauge needle. The 14-gauge needle has a larger diameter compared to smaller gauge needles, which allows for efficient release of air from the pleural space.
When performing decompression, the needle is inserted into the chest wall between the ribs, specifically into the second intercostal space at the midclavicular line, on the affected side of the pneumothorax. This allows for air to be rapidly released, relieving the tension pneumothorax and restoring normal lung function.
It is important to note that decompression of a tension pneumothorax should be performed by a medical professional who is trained in this procedure, as it requires skill and knowledge of proper technique to ensure safety and effectiveness.