The length of RAE preformed tubes.
D000768:Anesthesia, General / Q000295:instrumentation*; D001980:Bronchi; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007431:Intraoperative Complications / Q000209:etiology; D007442:Intubation, Intratracheal / Q000295:instrumentation*