<prompt> Most common site for putting chest drain in case of pleural effusion -2nd intercostal space midclavicualar line7th intercostal space midaxillary line5th I.C. space mid clavicular line.5  <response>: Site for putting chest drain in pleural effusion 7th ICS mid axillary lineSite for putting needle in spontaneous pneumothorax 2nd ICS, mid clavicular line. 