Final answer:
Needle decompression for a tension pneumothorax involves inserting a 14-gauge needle into the second intercostal space at the midclavicular line of the affected side to relieve pressure and allow the lung to re-expand.
Step-by-step explanation:
Needle decompression should be performed by inserting a large-bore needle into the second intercostal space at the midclavicular line on the affected side of the chest, typically using a 14-gauge needle. This procedure is done to relieve the pressure caused by excess air within the pleural cavity, which hinders lung expansion, called a tension pneumothorax. To safely perform this procedure, the individual should be in a supine position, and care must be taken to penetrate only the pleural space and not damage underlying structures.
Upon successful insertion, air will escape through the needle, indicated by an audible hiss or improved respiratory function. The needle should remain in place until a chest tube can be inserted by a qualified medical professional. It's crucial to monitor the patient for any changes in condition and be prepared for further interventions as needed. This procedure is reserved for emergency situations and should only be performed by those trained in advanced medical procedures.