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Cervical lung lobe herniation in dogs identified by fluoroscopy
Laura A Nafe1, Ian D Robertson, Eleanor C Hawkins
1Veterinary Health Complex (Nafe), and Departments of Molecular Biomedical Sciences (Robertson) and Clinical Sciences (Hawkins), North Carolina State University College of Veterinary Medicine, 1060 William Moore Drive, Raleigh, North Carolina 27607, USA.
The Canadian Veterinary Journal = La Revue Veterinaire Canadienne
|October 25, 2013
Summary
Cervical lung lobe herniation (CLLH) is common in dogs with cough, affecting 70% of those studied. CLLH is strongly linked to intra-thoracic airway collapse, indicating a significant association between these conditions.
Area of Science:
- Veterinary Medicine
- Respiratory System Anatomy
- Diagnostic Imaging
Background:
- Cervical lung lobe herniation (CLLH) is an uncommon condition in dogs.
- The clinical significance and associated factors of CLLH require further investigation.
Purpose of the Study:
- To determine the frequency of CLLH in dogs evaluated via fluoroscopy.
- To identify clinical and radiographic characteristics associated with CLLH.
Main Methods:
- Retrospective review of diagnostic procedures and patient summaries (2008-2010).
- Comparison of signalment, body weight, cough duration, heart murmur, airway collapse, and radiographic findings between dogs with and without CLLH.
- Fluoroscopic and bronchoscopic assessments of tracheal and bronchial collapse.
Main Results:
- CLLH was diagnosed in 85 out of 121 (70%) dogs.
- Intra-thoracic tracheal collapse and major bronchial collapse were strongly associated with CLLH.
- Redundant dorsal tracheal membrane on radiographs was associated with CLLH, but extra-thoracic tracheal collapse was not.
Conclusions:
- Cervical lung lobe herniation is highly prevalent in dogs presenting with cough.
- Intra-thoracic large airway collapse is a significant finding associated with CLLH.
- CLLH is not associated with the duration of cough.
