a) Small-bore pigtail catheter a) Small-bore pigtail catheter. b) Insertion of chest drain using aseptic Seldinger technique. c) Post-procedure radiograph with drain in situ. a) Small-bore pigtail catheter. b) Insertion of chest drain using aseptic Seldinger technique. c) Post-procedure radiograph with drain in situ. This patient had rapid drainage of fluid following drain insertion and developed ARDS, most likely due to re-expansion pulmonary oedema. Rishi Pabary, and Ian M. Balfour-Lynn breathe 2013;9:210-222 ©2013 by European Respiratory Society