Chest Comp Flashcards
PA chests are good for visualizing?
- pneumothorax
- pleural effusions
- atelectasis
- signs of infection
Why is erect chest better than supine?
- diaphragm allowed to move farther down (gravity)
- air fluid levels visualized
- engorgement and hyperemia of pulmonary vessels (distended and swollen with fluid) may be prevented
What is a lateral chest good for visualizing?
-pathologies situated posterior to the heart ,great vessels, and sternum
How much rotation is acceptable on a lateral chest?
1/4 to 1/2”
How do you identify the left hemidiaphragm from the right?
The gastric air bubble and inferior border of the heart shadow
What is better about a right lateral compared to a left?
Increased radiographic detail in the right lung because is it placed closer to the IR
What is best seen on a supine chest?
-pathologies including the lungs, diaphragm, and mediastinum
Why do we do a PA expiration chest?
- foreign bodies
- pneumothorax
How many ribs are seen on a PA expiration chest?
8 or fewer
What do we do to our technique for an PA expiration chest?
Increase mAs, lungs more dense without air
Why do we do a lateral decubitus?
-better detects small amounts of fluid in the pleural space
How do we position for fluid vs. air on a lateral decubitus?
Fluid: affected side down
Air: affected side up
3 parts of the chest
- bony thorax
- respiratory system proper
- mediastinum
What is the bony thorax?
Provides protective framework for the parts of the chest involved with breathing and blood circulation (thoracic visera)
Parts of the sternum (breast bone)
- manubrium
- body
- xiphoid process
Parts of the bony thorax?
- sternum
- clavicles
- scapulae
- ribs
- thoracic vertebrae
Positioning landmarks and their vertebral levels?
- Vertebral prominens C7
- Jugular notch T3
- xiphoid process T9/T10, T11/T12 on inspiration (approx level of anterior diaphragm which separates the chest and abdominal cavity
4 divisions of the respiratory system?
- larynx
- trachea
- bronchi
- lungs
What is the diaphragm for?
Primary muscle of inspiration
How does the diaphragm affect chest volume and thoracic pressure?
Diaphragm down (inspiration) = decreased thoracic pressure = increased chest volume = sucking action
What does the esophagus connect?
The pharynx to the stomach (laryngeopharynx down)
Where is the larynx (voice box) located?
C3/C6, suspended from hyoid bone
What does the larynx consist of?
- thyroid cartilage (laryngeal prominence and cricoid cartilage)
- vocal cords
- epiglottis
What vertebral level is the trachea at?
C6-T4/5