8/8/15 AAC

Question 1

What are 3 causes of increased BUN/Cr ratio?

Answer 1

1. Prerenal renal disease
2. GI bleeding
3. Steroids

Question 2

What lymph node characteristics are more suggestive of malignancy?

Answer 2

1. Firm and immobile

2. Greater than 2cm

Question 3

How does aspergillosis present on CT?

Answer 3

Pulmonary nodules with “halo sign” or lesions with an “air crescent”

Question 4

What is the most common cause of non-traumatic subarachnoid hemorrhages?

Answer 4

Rupture of saccular or berry aneurysms

Question 5

What is the second step to rule out a subarachnoid hemorrhage after a negative CT?

Answer 5

LP: elevated opening pressure and unexplained xanthochromia

Question 6

What are the Light’s criteria for exudative fluid?

Answer 6

Pleural fluid/serum ratio of:

1. Protein > 0.5
2. LDH > 0.6
3. Pleural LDH > 2/3 of upper limit of serum LDH (> 180)

Question 7

What are the 3 physiologic factors that define ARDS?

Answer 7

1. Decreased gas exchange
2. Decreased lung compliance
3. Increased pulmonary arterial pressure

Question 8

What type of tumor is consistent with:

1. large anterior mediastinal mass
2. elevated b-HCG and AFP?

Answer 8

Nonseminomatous germ cell tumor