The use of plastic cuffed endotracheal tubes.
D000768:Anesthesia, General / Q000662:veterinary*; D000818:Animals; D003287:Contrast Media; D007442:Intubation, Intratracheal / Q000295:instrumentation / Q000662:veterinary*; D010969:Plastics; D011859:Radiography
D003287:Contrast Media; D010969:Plastics