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ABSITE > Small Bowel > Flashcards

Small Bowel Flashcards

1
Q

retroperitoneal portions of the duodenum

A

descending and transverse

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2
Q

transition point between the third and fourth portions of the duodenum

A

acute angle between the aorta and SMA

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3
Q

site of B12 absorption

A

terminal ileum

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4
Q

site of iron absorption

A

duodenum

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5
Q

90 % of water absorption

A

jejunum

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6
Q

vascular supply of jejunum

A

SMA

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7
Q

intestinal brush border

A

maltase sucrase, limit dextrinase, lactase

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8
Q

M cells

A

antigen presenting cells in the intestinal wall

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9
Q

Peyers patches

A

lymphoid tissue, incureased in the ileum

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10
Q

absorption of bile salts

A

45 % ileum, 5 % colon passive

50% active in terminal ileum

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11
Q

conjugation of bile

A

to taurine and glycine

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12
Q

primary bile acids

A

cholic and chenodeoxycholic acid

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13
Q

secondary biles acids

A

deoxycholic and lithocholic

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14
Q

short gut syndrome

A

diarrhea, steatorrhea, weight loss, nutritional deficiency

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15
Q

check for fecal fat

A

sudan red stain

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16
Q

schilling test

A

tests for B12 absorption (radiolabeled B 12 in urine)

17
Q

causes of steatorrhea

A

gastric acid hypersecretion of acid

interruption of bile salt reorption

18
Q

non healing fistulas

A

FRIENDS

foreign body, radiation, inflammatory bowel disease, epitheliazation, neoplasm,, distal obstruction, sepsis/ infection

19
Q

air in the biliary tree

A

gallstone ileus

20
Q

gallstone ileus

A

SBO fro gallstone in terminal ileum

fistula between gallbladder ans second protion of duodenum

21
Q

meckels diverticulum

A

2 ft from ileocecal valve, 2 % of population, 2 yr of life at presentation
2 types of tissue - pancreas and gastric

22
Q

failure of closure of the omphalomesenteric duct

A

meckels diverticulum

23
Q

most common tissue found in meckels diverticulum

A

pancreas tissue

24
Q

most likely tissue in meckels to be symptomatic

A

gastric mucosa

25
Q

breakdown product of serotonin

A

5-HIAA - can be measured in urine

26
Q

precursor of serotonin

A

tryptophan

27
Q

produces serotonin

A

kulchitsky cells (enterochromaffin cell)

28
Q

carcinoid syndrome

A

intermittent flushing and diarrhea

29
Q

most common site for carcinoid tumor

A

appendix

30
Q

carcinoid in appendix < 2 cm

A

appendectomy

31
Q

carcinoid in appendix > 2cm or involving base

A

right hemicolectomy

32
Q

Peutz jeghers syndrome

A

jejunal and ileal hamartomas, mucocutaneous melanotic skin pigmentation

33
Q

most common cause of appendicitis in children

A

hyperplasia

34
Q

most common cause of appendicitis in adults

A

fecalith

35
Q

most likely spot of appendix to perforate

A

midpoint of antimesenteric border

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