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CLASP - radiology > GI and acute abdomen > Flashcards

GI and acute abdomen Flashcards

1
Q

What is the most common diagnosis of acute abdomen

A

non-specific / unknown

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2
Q

USS indications

A

appendicitis, cholecystitis, gynae,

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3
Q

MRI indications

A

pelvis, hepato-biliary

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4
Q

Imaging for acute appendicitis

A

USS
CT
fluid filled inflamed enlarged appendix

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5
Q

Imaging for acute diverticulitis

A

CT

grossly thickened colon

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6
Q

complications of diverticulitis

A

abscess, perforation, obstruction, fistulae

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7
Q

Imaging in acute cholecystitis

A

USS - enlarged GB and stones
CT - enhancing GB wall
MRCP - non-therapeutic
ERCP - therapeutic

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8
Q

What is emphysematous cholecystitis and in which group is it seen in

A

gas in the GB wall

diabetics

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9
Q

causes of small bowel obstruction

A

adhesions, tumours, herniae, gallstone ileus, Crohn’s

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10
Q

imaging in SBO

A

AXR

CT

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11
Q

What is the 3-6-9 rule

A

small bowel dilatation >3cm
large bowel dilatation >6cm
caecum dilatation >9cm

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12
Q

Causes of large bowel obstruction

A

CRC
herniae
volvulus
diverticulitis

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13
Q

Imaging in LBO

A

AXR

CT

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14
Q

Causes of perforation

A

Peptic ulcer
diverticular disease
2ndary to cancer, ischaemia

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15
Q

Imaging in perforation

A

Supine AXR + Erect CXR

CT

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16
Q

What is Rigler’s sign and where is it seen

A

“double wall sign” in gut seen in perforation as there is gas on both sides of the gut wall rather than just on the inside

17
Q

what % of cardiac output usually goes to the GI tract and what % occurs in ischaemia

A

normally 20%

<10% - ischaemia

18
Q

Causes of bowel ischaemia

A

Arterial occlusion
Venous occlusion
Non-occlusive hypoperfusion

19
Q

contrast features of arterial and venous occlusion in bowel ischaemia

A

NON-enhancing

20
Q

Imaging in bowel ischaemia

A

BIPHASIC CT

21
Q

Imaging in ureteric calculi

A

CT KUB without contrast

CLASP - radiology (4 decks)

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