Fluoroscopic characteristics of tracheal collapse and cervical lung herniation in dogs: 222 cases (2012-2015)
Jeosoon Lee, Sookyung Yun, Inhyung Lee, Mincheol Choi, Junghee Yoon*
College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Korea
Correspondence to: Tel: +82-2-880-1265; Fax: +82-2-876-8662; E-mail: heeyoon@snu.ac.kr
Received: June 3, 2016; Revised: October 4, 2016; Accepted: November 23, 2016; Published online: January 4, 2017.
This retrospective study was performed in 222 dogs suspected to have tracheal collapse (TC) from January 1, 2012 to December 31, 2015. Fluoroscopy and radiographic images with medical records were evaluated to investigate the fluoroscopic characteristics of TC and cervical lung herniation (CLH), and determine their relationship to various influencing factors. Fluoroscopically, grade of TC, existence of tracheal kinking, location of CLH (right or left side), and grade of CLH were evaluated. One hundred ninety nine dogs (89.6%) were diagnosed with TC. Tracheal collapse showed no association with the patients’ history of cough. Cervical lung herniation is positive correlation with a history of cough (OR, 2.896; 95% CI, 1.556 to 5.390) and affected by tracheal kinking (OR, 3.841; 95% CI, 1.884 to 7.831). Chronic cough is not related with CLH. Since TC can be observed in patients without a history of cough, it should be ruled out using physical examination and diagnostic imaging. Although CLH is associated with a history of cough, it is a common appearance in dogs and transient coughing can elicit CLH in patients without a history of cough.
Keywords: cervical lung herniation, dogs, fluoroscopy, tracheal collapse

© 2017 The Korean Society of Veterinary Science.