Posi Sm & Lg Bowel Qs
Which projection of the colon best demonstrates the left colic flexure?
PA oblique, LAO
Which projection of the colon best demonstrates the ascending colon?
PA oblique, RAO
Which projection of the colon best demonstrates the right colic flexure?
PA oblique, RAO
The entire colon is best demonstrated in which projection?
PA or AP
Which position should the patient be placed in to insert the enema tip for a barium enema?
Sims
At which plane is the central ray positioned for the PA oblique projections (LAO or RAO) of the large intestine?
a longitudinal plane 1 to 2 inches lateral to the midline of the body on the elevated side
For which type of body habitus is the large intestine bunched together and positioned very low in the abdomen?
asthenic
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 area of the colon identified in the figure below is the:
cecum (pic)
The PA oblique projection of the colon done in the LAO position clearly demonstrates the:
descending colon
The widest portion of the small bowel is the:
duodenum
The general term used to describe the surgical procedure of forming an artificial opening to the intestine for the passage of fecal material is:
enterostomy
The large intestine is made up of a series of pouches called the:
haustra
The opening between the small intestine and the large intestine is called the:
ileocecal valve
The most distal portion of the small intestine is the:
ileum
The majority of AP, PA, and oblique radiographs taken during a barium enema are done on 35X43-cm IRs. Where is the IR centered on sthenic patients for the majority of these projections?
iliac crests
Where is the IR centered for all decubitus projections of the large intestine?
iliac crests
Which of the following is true regarding inflation of the retention balloon for a barium enema?
it should be inflated by the radiologist using fluoroscopy
Where is the IR centered for delayed radiographs of the small intestine after 30 minutes?
level of the iliac crests
The jejunum and ileum are attached to the posterior wall of the abdomen by the:
mesentery
Which plane is centered to the grid for a lateral projection of the large intestine?
midcoronal plane
How far is the enema tip inserted into the rectum for a colon examination?
no more than 4 inches
The contraction waves by which the digestive tube moves its contents toward the rectum are called:
peristalsis
Methods of radiographically examining the colon include:
single contrast and double contrast
The respiration phase for all projections of the large intestine is:
suspended respiration
Which projections will clearly demonstrate the descending colon?
*PA oblique, LAO *AP oblique, RPO
The patient preparation for a small intestine examination is:
*food and fluid withheld after the evening meal *no breakfast
Methods of performing a double-contrast barium enema include:
*single-stage procedure *two-stage procedure
The main functions of the small bowel are: 1.) digestion of food 2.) absorption of food 3.) storage of food
1 and 2
Preparation of the intestinal tract for examination of the colon includes: 1.) laxatives 2.) dietary restrictions 3.) cleansing enemas
1, 2, and 3
Which methods are used to administer barium for a radiographic examination of the small intestine? 1.) by mouth 2.) reflex filling 3.) enteroclysis
1, 2, and 3
Which of the following are included as components of the alimentary canal? 1.) anus 2.) colon 3.) esophagus
1, 2, and 3
Which of the following can be used to record the fluoroscopic image? 1.) TV 2.) cine 3.) video recorders
1, 2, and 3
Which of the following radiographs are taken during a single-contrast barium enema? 1.) "spot" radiographs 2.) "filled" colon radiographs 3.) post-evacuation radiographs
1, 2, and 3
Which projections taken during a barium enema will demonstrate the rectosigmoid area? 1.) lateral 2.) PA axial 3.) AP axial
1, 2, and 3
The first small intestine radiograph is taken how many minutes after the patient drinks barium?
15 minutes
How far above the anus is the enema bag placed during a barium enema?
18 to 24 inches
The main functions of the large intestine are: 1.) digestion of food 2.) re-absorption of fluids 3.) elimination of waste products
2 and 3
Where is the IR centered for radiographs of the small intestine that are taken within 30 minutes of drinking the barium?
2 inches above the iliac crests
Which of the following examinations requires the use of time markers on the radiographs? 1.) stomach 2.) small intestine 3.) large intestine
2 only
What is the length of the average adult small intestine?
22 feet
The small intestine is divided into how many distinct portions?
3
"High-density" barium sulfate is used primarily for: 1.) enteroclysis intestine examinations 2.) single-contrast intestine examinations 3.) double-contrast intestine examinations
3 only
How long is the entire alimentary canal?
30 feet
What is the central-ray angulation for the PA axial projection of the large intestine?
30 to 40 degrees caudad
The central-ray angulation for the AP axial projection of the large intestine is:
30 to 40 degrees cephalad
The degree of body rotation for an AP oblique projection of the large intestine is:
35 to 45 degrees
The degree of body rotation for the PA oblique projection (RAO or LAO) of the large intestine is:
35 to 45 degrees
The wall of the colon is composed of how many layers?
4
The wall of the small intestine is composed of how many coats?
4
What is the length of the large intestine?
5 feet
How long is the duodenum?
8-10 inches
What percentage of the population will have a combination of sthenic and hyposthenic body habitus?
85%
Which of the following are essential projections for examination of the small intestine?
AP and PA
Which projections will clearly demonstrate the right colic flexure?
AP oblique, LPO and PA oblique, RAO
At what level is the center of the IR positioned for a lateral projection of the rectosigmoid area?
ASIS
Which of the following demonstrates the rectum and rectosigmoid area in a true axial projection?
Chassard-Lapiné method
