1- GI Diagnostics Flashcards
Abd pain, N/V, and/or distention are indications for what GI imaging?
3 way view abdominal XR
What is the initial imaging for evaluating a distended bowel?
Supine A/P view (KUB)
What GI imaging will best evaluate air fluid levels?
Upright Abd XR
A CXR will be able to identify what with respect to the abdomen?
subdiaphragmatic air due to perforation
On 3 way view abd XR what would you expect to see with a bowel obstruction?
dilated bowel proximal to obstruction w/ collapsed bowel distally
On 3 way view abd XR what would you expect to see with a ileus?
dilated bowel with air present in both small & larg intestines w/o air fluid levels
On 3 way view abd XR what would you expect to see with a perforation?
free air outside of the bowel
A 3 way abd XR is contraindicated in what pt population?
Pregnancy
What is the abdominal imaging of choice for pt w/ contrast allergy, poor renal function or pregnancy?
Abdominal US
What is the dx imaging of choice for cholithiasis?
Abdominal US
What are the indications of an abdominal US?
Abd pain, elevated liver tests, nephrolithiasis or cholelithiasis, cholecystitis, hepatic steatosis, AAA,
Abd pain, constipation, rectal bleeding are the indications for what abdominal imaging study?
CT abdomen and pelvis
When would you not use contrast in a CT abd & pelvis?
If suspected nephrolithiasis (sx: flank pain and hematuria)
What is the preferred imaging study for evaluating pancreatitis?
CT abdomen and pelvis
CT abd & pelvis will show what for acute pancreatitis?
Inflammation and swelling of pancreas
CT abd & pelvis will show what for chronic pancreatitis?
Calcifications
What are the contraindications for CT abd & pelvis?
Pregnancy, unstable vitals, morbidy obesity contrast allergy and elevated creatinine
A reaction to contrast or AKI are complications to what GI imaging study?
CT abdomen and pelvis
What is the protocol for T2DM pt on metformin needing a CT abd and pelvis w/ contrast?
Hold metformin for 48 hrs post-contrast
What GI imaging will best evaluate diverticulitis, appendicitis and pancreatitis?
CT abdomen and pelvis
What GI imaging will best evaluate hepatobilliary disease?
Abdominal US
What GI imaging will best evaluate billiary dysfunction?
HIDA scan
What Gi imaging uses an IV tracer to assess bile excreting function of the liver and galbladder?
HIDA scan
What does an abnormal or positive HIDA scan show?
Unable to visualize GB due to cystic duct obstruction
If using a HIDA scan to evaluate cholecystitis what should also be ordered for best results?
Ordered w/ CCK
What is a normal ejection fraction for HIDA scan ordered with CCK?
> 35% (abnormal = < 35%)
What is a contraindication to a HIDA scan?
Pregnancy
What GI imaging will best evaluate luminal GI disorders (mucosa and peristalsis)?
Barium studies (per anatomic section of interest)