GI

Question 1

Normal Solid retention

Answer 1

2 hrs: < 60%
4 hrs: 0-10%
4-hr retention: Greatest specificity in diagnosis of delayed gastric emptying

Question 2

Normal liquid retention

Answer 2

1 hr: < 50%

Question 3

Rapid gastric transit of solids

Answer 3

< 70% at 30 min &/or
< 30% at 60 min
Or < 50% retention at 1 hr

Question 4

Blood flow to the GI tract

Answer 4

Celiac: Lower 1/3 of esophagus, stomach, 1st and 2nd parts of duodenum

SMA: 2nd part of duodenum to distal 1/3 of transverse colon

IMA: Distal 1/3 of transverse colon to proximal rectum

Internal iliac: Middle and inferior rectum