Normal CXR Flashcards
What is the most common accessory fissure of the lung?
Azygous fissure containing the azygous vein
In what condition would the costophrenic angle disappear on an CXR?
Pleural effusion
The right hemi-diaphragm is usually slightly higher than the left. T/F?
True
What is the maximum cardio-thoracic ratio that can be normal in an adult?
50%
For what group of adults would it potentially be normal to have a slightly larger cardio-thoracic ratio of 55%?
African American adults
In which bronchi is aspiration more likely to occur?
The right main bronchus as its more vertically oriented
Pleura are visible on an CXR. T/F?
False
Teenagers tend to have a small aortic knuckle. T/F?
True
If the aorta-pulmonary window bulges out, this could be a sign of…?
Lymphadenopathy
The left hilar point is general higher than the right hilarity point. T/F?
True
The lymph nodes in the hilum are usually visible. T/F?
False - these are not usually visible unless enlarged
The posterior ribs run horizontally. T/F?
True
The anterior ribs run at an angle. T/F?
False
Give examples of situations in which emergency CXRs may be performed.
Acute respiratory symptoms Chest pain Septic screen Acute abdomen Post central line/chest drain insertion
Give examples of situations in which elective CXRs may be performed.
Persistent / chronic respiratory symptoms
Pre-operative work up
Metastatic screen
TB contacts
What is the standard view used in a CXR?
PA
Where would an AP CXR be used?
On a ward or in the ICU
Why do you get a better sense of the size of the heart from a PA CXR view than an AP view?
Because in a PA view, the heart is closer to the film
How can the degree of inspiration on a CXR be determined?
By counting the ribs
How many anterior ribs should be visible on a CXR?
6 anterior ribs
How many posterior ribs should be visible on a CXR?
9-10 posterior ribs
How can rotation be assessed on a CXR?
Look for the ‘teardrop’ shape of the spinous processes and assess their distance from each of the clavicles
How can you determine if there is good exposure in a CXR?
With good exposure you shouldn’t be able to see the vertebra through the heart shallow
