31. Thoracic wall Flashcards
Which breeds have thoracic conformation that can produce the appearance of pneumothorax / thoracic wall thickening NORMALLY?
Dachsunds, other chondrosdsystrophic breeds (e.g. basset) -> Hour glass shape to thorax
Sternal anomalies have been associated with which condition?
PPDH (+ congenital heart disease elsewhere?)
What is pectus carniatum? And what has it been associated with?
Ventral deviation of sternbral segments, caused by idiopathic overgrowth of costal cartiges.
Associated with CONGENITAL HEART DISEASE and STERNAL SEGMENT ABSENCE
What is pectus excavatum? Aetiology?
Dorsal displacement of sternum -> Dorsoventral narrowing of thoracic cavity.
Congenital (more common) but can be acquired -> described in dog with LarPar, subsequently improved once tieback performed
What technique improves identification of rib fractures by novice readers?
Turning image 90 Deg.
=> no improvement if more experienced, no improvement if rotate 180 for any reader
Define flail chest
>2 adjacent segmental rib fractures -> Flail segment moves paradoxically to thoracic wall. In during inspiration, out during expiration
Spontaneous rib fractures occur in association with which conditions? Where?
- Chronic resp effort, coughing, metaboliv disease, neoplasms
- MIDPORTION 9th-13th RIBS
=> in older cats with resp signs, osteopaenia may play a role
What feature is more typical of rib neoplasia cf osteomyelitis?
Larger soft tissue component
LIst possible causes of sternebral infection
Penetrating trauma
Migrating FB
Haematogenous (intersternebral space -> looks like disco)
What are the 2 most common causes of cellulitis / infection of thoracic wall?
Trauma
Migrating grass awn
What is the aetiology of calcinosis circumscripta?
Unknown, but thought to ve limked to ST injury attibutable to inflamm / neoplasia
Which ribs fracture spontaneously with dyspnoea!!
9-13th
