Lower GI - UNIT 5
which projection of the colon best demonstrates the right colic flexure?
LPO/RAO
the PA oblique projection of the colon done in the LAO position clearly demonstrates the:
Left colic flexure
which projection of the colon best demonstrates the left colic flexure?
PA oblique, LAO
the entire colon is best demonstrated in which projection?
PA or AP
which plane is centered to the grid for a lateral projection of the rectum?
a longitudinal plan 2 inches posterior to the median coronal plane
the main functions of the small bowel are:
absorption of food and digestion of food
the pouchlike portion of the large intestine that is situated below the junction of the ileum and colon is the:
cecum
the vermiform appendix of the colon is attached to the:
cecum
the duodenum joins the jejunum at a sharp curve called the:
duodenojejunal flexure
pt prep for a small intestine examination is:
food and fluid withheld after the evening meal and no breakfast
the opening between the small intestine and the large intestine is called the:
ileocecal valve
most distal portion of the small intestine is:
ileum
where is the IR centered for delayed (longer than 30 mins) radiographs of the small intestine?
level of the iliac crests
how far is the enema tip inserted into the rectum for a colon examination?
no more than 4 inches
main functions of the large intestine:
reabsorption of fluids and elimination of waste products
the ascending portion of the colon joins the transverse colon at the:
right colic flexure
widest portion of the small bowel is:
the duodenum
at which plane is the central ray positioned for the PA projections (LAO or RAO) of the large intestine?
the midclavicular longitudinal plane on the elevated side
the mucosa of the small intestine contains a series of fingerlike projections called:
villi
which projections taken during a barium enema will demonstrate the rectosigmoid area?
1) lateral 2) PA axial 3) AP axial
which projections will clearly demonstrate the right colic flexure?
1)AP oblique, LPO 2)PA oblique, RAO
first small intestine radiograph is taken how many minutes after the patient drinks barium?
15 mins
how far above the anus is the enema bag placed during a barium enema?
18-24 inches
where is the IR centered for radiographs of the small intestine that are taken within 30 mins of drinking barium?
2 inches above the iliac crests
length of the average adult small intestine
22 feet
small intestine is divided into how many distinct portions?
3
what is the central-ray angulation for the PA axial projection of the large intestine?
30-40 degrees caudad
central-ray angulation for an AP axial projection of the large intestine is:
30-40 degrees cephalad
length of the large intestine
5 feet
