An obturator for a bronchial tube or tubule of a human or animal lung includes a blocking element (92) and a securing element (90). The blocking element serves to seal the tube or tubule against the passage of fluid past the obturator when the obturator is disposed in a bronchial tube or tubule. The...http://www.google.com.hk/patents/US8136520?utm_source=gb-gplus-share專利 US8136520 - Occlusion device
