Imaging of acute abdomen-Kerlan Flashcards
2 most common causes of bowel obstruction
External hernia
2 most common causes of acute pancreatitis
gall stones
alcohol
identify the most sensitive imaging modality to detect free air
CT!
When imaging is required to further investigate a symptom or sign, what are the options?
plain abdominal radiograph
US
compound tomography
MRI
What are the common causes of abdominal pain?
inflammation
obstruction
perforation
vascular
What is the primary modality in north america?
CT
What do you use a US for?
gallbladder/biliary disease
OBGYN indications
Appendicitis in young or thin pnts
What is plain film used for?
obstruction and free air (80% sensitive)
95% of small bowel osbtructions seconday to herniation are due to (Blank) henias.
external (inguinal, femoral, umbilical, incisional etc)
5% of small bowel osbtructions seconday to herniation are due to (Blank) henias.
internal hernias (Paraduodenal, epiploic foramen, diaphragmatic, )
SBO secondary to herniation may lead to (blank and blank)
strangulation and ischemia (complicates 28% of SBOs due to hermias)
What is the cardial plain radiograph sign of bowel obstruction?
What are the cardinal CT signs?
Dilated bowel proximally with collapsed bowel distally
Rarely see cause of obstruction or transition point
Dilated bowel proximally with collapsed bowel distally
Usually see transition point and cause of obstruction
Lack of visible cause suggests adhesions (by exclusion)
You can get adhesive small bowel obstruction which results in (Blank) between surfaces that connect bowel, solid organs, abdominal well.
When do you usually get them?
fibrofatty bands
post-op (rarely congenital or post-inflammatory)
Adhesive SBO causes (blank) % of all bowel obstruction and (blank)% of all small bowel obstruction.
What can it occur?
40%
70%
anytime but 40% occur before 1 year
How do you make adhesive SBO diagnosis via CT?
Dilated bowel proximal to collapsed bowel
No cause seen at transition point
