This document provides instructions for surgically inserting a chest drain. It outlines the necessary pre-procedural checks, equipment, patient preparation, anesthesia technique, dissection and drain placement steps. Key steps include identifying the correct intercostal space using anatomical landmarks, infiltrating the skin and pleura with local anesthetic, making an incision and dissecting into the pleural space, placing a holding suture, inserting the drain tube until the holes are in the chest cavity, securing and attaching it to a drainage system, and doing post-procedure checks including a chest x-ray. Samples of any effusion should also be sent for microbiological and biochemical analysis.