Positioning GI

How long is the alimentary canal

30 feet

What is the most common contrast fort he alimentary canal

Barium sulfate

How long does barium sulfate take to go through the entire alimentary canal to reach the rectum

24 hours

Gastrografin

water soluable, readily absorbed by body, excreted by kidneys in cases of perforation

what scenario will always call for gastrografin instead of barium

If theres any chance of tear or aspiration

Preparation of exam room

Room should be completely prepared before patients enter. PRepare type and amount of contrast.

What makes GI radiography challenging?

Elimating motion

Where is peristalsis greatest

the stomach and duodenum

What pahse of respiration should stomach exposures be?

End of expiration

How long should stomach exposures be?

.1-.5 seconds depending on peristaltic activity

In fluoro exams where does shield go?

Behind the patient

Which oblique is preferrable for espophogus? and how many degrees?

right anterior oblique, 35-40*

What is glucagon

A oral contrast aid that’s used in double-contrast studies and it helps relax the GI tract

What phase of respiration should PA stomach and duodenum be?

end of suspended expiration

where is the ir centered for PA oblique stomach and duodenum

Lower rib margin

where is the ir centered for AP oblique stomach and duodenum

xiphoid proces and lower rib margin

where is ir centered at for lateral stomach and duodenum

L1-L2 for recumbent, L3 for upright

how long is the small intestine and what is it’s purpose?

22 feet, absorption

what is the first portion of the duodenum

Duodenal bulb

What is one imporatant thing for AP/PA small intestine?

Using a time marker

When is the AP/PA small intestine done?

When the barium reaches the ileocecal valve.

how many layers of the large intestine are there?

4

name of right colic flexure

Hepatic

Name of left colic flexure

Splenic

How high should the bag be above the table for BE

no more than 24”, general 18-24.

How is the baloon inflated pre-BE?

using fluro and done by a radiologist (IN BOOK NOT LIFE)

What temperature should the barium be for BE?

lower than body temp, 85-90* generally

what can you do to ally fears and embarrassment during BE

advise of methods of retention

what position should the patient be in for BE insertion

Sims’ position

during what respiration phase should you insert BE tip

exxpiration of deep breath

How far should BE tip be inserted

no more than 4 inches

waht should you do with the BE bag after the procedure

put ENTIRE bag into the bio hazard bin

PA or AP large intestine (KUB) cr placement

enters MSP at level of iliac crests

what does RAO best demonstrate in a PA oblique large intestine

right colic flexure, ascending colon, and sigmoid

what does LAO best demonstrate in a PA oblique large intestine

left colic flexure and descending colon

what should the CR enter in a PA oblique large intestine

1-2 inches lateral to midline of body on elecate side at the level of iliac crests

what breathing phase should lateral large intestine be in

breathing is suspending, however, exposure in made on expiration