Diaphragm Flashcards
What percentage of the thoracic motion is provided by the diaphragm?
75%
The muscular part of the diaphragm is separated into three parts?
Pars lumbalis
Par Costalis
Pars Sternalis
Where does the pars lumbalis attach?
L3-L4
Where does the pars costalis attach?
Ribs 8-13
Where does the pars sternalis attach?
Xyphoid
What are the three hiatus in the diaphragm?
- Aortic
- Esophageal
- Caval foramen
What structure(s) run through the caval foramen?
Caudal vena cava
What structure(s) run through the aortic hiatus?
- Aorta
- Azygous
- hemiazygos vein
- Thoracic duct
What structure(s) run through the esophageal hiatus?
- Esophagus
2. Vagus nerve
What crus is displaced on the lateral projections?
The dependent side
The CVC is confluent with what crus?
The right
Who can you tell if the lateral projection of the thorax is obliqued while looking at the crus?
If the crura are separated by more than 2.5 times a vertebral length
Intersection of the diaphragm with the vertebral bodies on radiographs is usually at what vertebrae?
T9-L1
What causes the intersection between the diaphragm and the vertebral bodies to be cranial displaced?
- Obesity
- Ascites
- Gastric or intestinal distention
- Mass in abdomen
- Abdominal pain
- Diaphragmatic paralysis
Two differentials for asymmetrical shape change of the diaphragm?
- Hemiparesis
2. Unilateral tension pneumothorax.
