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Procedures > Gastrointestinal GW > Flashcards

Gastrointestinal GW Flashcards

1
Q

Liver-spleen indications

A

Determination of size, configuration, and position
Detection of tumors, hematomas, cysts, abscesses, and trauma
Evaluation of function liver disease (cirrhosis and hepatitis)

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2
Q

RE cells are also called

A

Kupffer cells

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3
Q

RE cells are responsible for

A

Phagocytosis

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4
Q

Hepatocytes are responsible for

A

Bile formation

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5
Q

Liver/spleen RP

A

99mTc Sulfur Colloid

5-10 mCi

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6
Q

Liver/spleen acquisition

A

Flow
Statics taken after 10-15 mins
- all views
- ANT view w/marker on right costal margin for liver size and location, or left costal margin for spleen size
- breath holding views may be obtained for mobility of liver
SPECT optional

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7
Q

Imaging too soon on liver spleen scan will show

A

Cardiac blood pool activity

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8
Q

Imaging too soon on liver spleen scan will show

A

Cardiac blood pool activity

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9
Q

Liver/spleen scan upright acquisition considerations

A

Skin folds in obese patients

Breathing attenuation

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10
Q

Bile is a product of ______ and _____

A

Erythrocyte breakdown and Hepatocyte metabolism

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11
Q

Bile does what

A

Break down fats, stimulate peristalsis, enhance absorption of fatty acids

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12
Q

CCK is produced where

A

By the duodenum

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13
Q

What cells uptake RP for liver/spleen scan

A

RE (Kuppfer) cells

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14
Q

What cells uptake RP for HIDA

A

Hepatocytes

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15
Q

Cystic duct obstruction is also called

A

Acute cholecystitis

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16
Q

Patients with elevated bilirubin levels may need ________ dose of tracer

A

Higher

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17
Q

Morphine _____ the SOO

A

Constricts. Promotes back flow

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18
Q

Patient prep for HIDA

A

No pain killers or sedatives for 6-12 hours

fast 2-4 hours, but no more than 24 hours

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19
Q

GB is not visualized 1 hour after tracer
- what should you do?

A

Image out for up to 24 hours
Or
Give morphine

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20
Q

Protocol for CCK for patients who fasted more than 24 hours (or need hyperalimentation)

A

0.01-0.02 ug/kg over 3-5 minutes

Given 30-60 minutes before tracer

21
Q

Can CCK be given after morphine

A

No, it would result in a falsely low EF

22
Q

If gallbladder is visualized but small bowel is not

A

Image delays until it is

23
Q

How long is imaging continued after morphine is given

A

30 minutes

24
Q

What is biliary atresia

A

Blockage of ducts from the liver to the gallbladder

25
Q

What is phenobarbital used for

A

To differentiate biliary atresia from other causes of neonatal jaundice
- tracer will not be excreted into the bowel in patients with biliary atresia

26
Q

In patients with extremely high bilirubin levels may see

A

Kidneys on scan because they will take over excretion of tracer

27
Q

Most common benign tumors of the liver

A

Cavernous hemangioma

28
Q

Liver hemangioma RP

A

Tech labeled RBCs

20-25 mCi

29
Q

Liver hemangioma acquisition

A

Flow (optional)
Blood pool (optional)
Delay 45-180 minutes - SPECT preferred

30
Q

Meckels is usually located

A

Distal ileum

31
Q

Meckels rule of 2s

A

Found in 2% of the population

32
Q

Meckels pt prep

A

Fast for 2 hours

No diagnostic tests or laxatives 3-4 days prior

33
Q

Camera positioning for Meckels

A

Between xyphoid and symphysis pubis

34
Q

Imaging time for Meckels

A

Sequential statics every 30-60 seconds for 30-60 minutes

35
Q

Why are tech labeled RBCs better for intermittent GI bleeding?

A

Because tracer stays in blood pool for longer which allows for delayed imaging

36
Q

Gastro reflux RP

A

99mTc Sulfur colloid
- adults: mixed with 150 mL of OJ and 150 mL of hydrochloric acid
- babies: mixed with formula and given through nasogastric tube or baby bottle

37
Q

Patient position for gastro reflux study

A

Supine with abdominal binder
- serial images obtained

38
Q

Pt prep for gastric emptying

A

NPO 4 hours minimum

Prokinetic agents and agents that delay emptying stopped 2 days prior

Premenopausal women should ideally be studied on days 1-10 or cycle

39
Q

Proximal part of stomach

A

Fundus

40
Q

Distal part of stomach

A

Antrum

41
Q

3 pairs of salivary glands

A

Parotids
Submandibular
Sublingual

42
Q

Salivary gland imaging RP

A

99mTc pertechnetate

10 mCi

43
Q

Salivary gland acquisition

A

Flow optional
ANT images every 5 minutes
LATs at 30 minutes
If obstruction is suspected, pt will suck on a lemon
- ANT and LATs taken 10 mins later

44
Q

Leveen shunt is placed where

A

Draining fluid in peritoneal cavity through tube in the internal jugular being into the superior vena cava

45
Q

Leveen shunt RP

A

99mTc Sulfur Colloid
99mTc MAA

1-2 uCi into the peritoneal space

46
Q

Leveen shunt image acquisition

A

Serial imaging begins when lower part of tube is visualized

Liver/spleen or lung imaging is performed 1 hour after

Delays may be necessary

47
Q

H pylori produces

A

Urease, which is not typically found in stomach

48
Q

Breath test prep

A

Overnight fast

Swallows C14 urea pill and blows into balloon 10-15 mins later

49
Q

Breath test RP

A

C14 urea oral pill
1 uCi

Given 10-15 minutes prior to breath sample

Procedures (17 decks)

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