<prompt> Needle for thoracocentesis is inserted most commonly at -5th intercostal space in the midaxillary line3rd intercostal space in the midaxillary line4th intercostal space in the anterior axillary line9th intercostal space in the midclavicular line  <response>: Ans. is a i.e., 5th intercostal space in the midaxillary line o Lung extends upto 8th intercostal space at midaxillary line.o Pleura extends upto 10th intercostal space in mid-axillary line. Thus thoracocentesis is done at 8th, 9th or 10th intercostal space in midaxillary line to avoid damage to lung.o Chest tube drainage - 4th or 5th intercostal space just anterior to midaxillary lineo Thoracocentesis - 8th, 9,h or 10th intercostal space in midaxillary line. 