What is the gauge and length of the needle used for an NCD?

• A. 14 gauge 3.25 inch
• B. 18 gauge 1 inch
• C. 16 gauge 2 inch
• D. 20 gauge 1.5 inch

Answer: (A)

Needle chest decompression requires a large-bore, long needle to vent air quickly from the pleural space. The best choice is a 14-gauge needle about 3.25 inches long. The large bore allows rapid air escape, which is essential in a tension pneumothorax, and the 3.25-inch length helps the tip reach the pleural space through the chest wall in most adults when placed in the correct intercostal space. Smaller gauges (like 16, 18, or 20) would restrict airflow, and shorter needles (1 inch or 1.5 inch) might not reach the pleural space at all, making decompression ineffective.