Normal CXR Flashcards

1
Q

What is the most common accessory fissure of the lung?

A

Azygous fissure containing the azygous vein

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2
Q

In what condition would the costophrenic angle disappear on an CXR?

A

Pleural effusion

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3
Q

The right hemi-diaphragm is usually slightly higher than the left. T/F?

A

True

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4
Q

What is the maximum cardio-thoracic ratio that can be normal in an adult?

A

50%

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5
Q

For what group of adults would it potentially be normal to have a slightly larger cardio-thoracic ratio of 55%?

A

African American adults

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6
Q

In which bronchi is aspiration more likely to occur?

A

The right main bronchus as its more vertically oriented

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7
Q

Pleura are visible on an CXR. T/F?

A

False

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8
Q

Teenagers tend to have a small aortic knuckle. T/F?

A

True

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9
Q

If the aorta-pulmonary window bulges out, this could be a sign of…?

A

Lymphadenopathy

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10
Q

The left hilar point is general higher than the right hilarity point. T/F?

A

True

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11
Q

The lymph nodes in the hilum are usually visible. T/F?

A

False - these are not usually visible unless enlarged

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12
Q

The posterior ribs run horizontally. T/F?

A

True

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13
Q

The anterior ribs run at an angle. T/F?

A

False

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14
Q

Give examples of situations in which emergency CXRs may be performed.

A
Acute respiratory symptoms
Chest pain
Septic screen
Acute abdomen
Post central line/chest drain insertion
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15
Q

Give examples of situations in which elective CXRs may be performed.

A

Persistent / chronic respiratory symptoms
Pre-operative work up
Metastatic screen
TB contacts

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16
Q

What is the standard view used in a CXR?

A

PA

17
Q

Where would an AP CXR be used?

A

On a ward or in the ICU

18
Q

Why do you get a better sense of the size of the heart from a PA CXR view than an AP view?

A

Because in a PA view, the heart is closer to the film

19
Q

How can the degree of inspiration on a CXR be determined?

A

By counting the ribs

20
Q

How many anterior ribs should be visible on a CXR?

A

6 anterior ribs

21
Q

How many posterior ribs should be visible on a CXR?

A

9-10 posterior ribs

22
Q

How can rotation be assessed on a CXR?

A

Look for the ‘teardrop’ shape of the spinous processes and assess their distance from each of the clavicles

23
Q

How can you determine if there is good exposure in a CXR?

A

With good exposure you shouldn’t be able to see the vertebra through the heart shallow