Ch. 331.2 - Meckel Diverticulum Flashcards Preview

Nelson - The Digestive System > Ch. 331.2 - Meckel Diverticulum > Flashcards

Flashcards in Ch. 331.2 - Meckel Diverticulum Deck (22):
1

MC congenital anomaly of the GI tract

Meckel diverticulum

2

Meckel diverticulum is caused by

Incomplete obliteration of the omphalomesenteric duct during the 7th week of gestation

3

Location of Meckel diverticulum

3-6 cm out pouching of the ileum along the anti mesenteric border 50-75 cm from the ileocecal valve

4

Rule of 2s referring to classic presentation of Meckel diverticulum (6)

1) ~2% of the general population 2) 2 feet proximal to the ileocecal valve 3) ~2 inches in length 4) 2 types of ectopic tissue 5) Before the age of 2yrs 6) 2x more common in females

5

Entrapment of Meckel diverticulum in a femoral hernia

Littre hernia

6

Meckel diverticulum is a remnant of what structure

Omphalomesenteric duct

7

Omphalomesenteric duct usually obliterates when

Between 5th and 7th wk of gestation

8

Symptoms of Meckel diverticulum usually arise when

1st or 2nd year of life

9

Ectopic mucosa of Meckel diverticulum us most commonly of ___ origin

Gastric

10

Stool description as an outcome of painless rectal bleeding from Meckel diverticulum

Brick-colored or currant jelly

11

Bleeding from Meckel diverticulum can cause significant anemia but is usually self-limited because of

Contraction of the splanchnic vessels as the patients become hypovolemic

12

MC mechanism of obstruction associated with Meckel diverticulum

Diverticulum acts as lead point of an intussusception

13

T/F Mean age of onset of obstruction associated with Meckel diverticulum is younger than that for patients presenting with bleeding

T

14

Mean age of Meckel diverticulum presenting as diverticulitis mimicking acute appendicitis

8 y/o

15

Meckel diverticulum accounts for ___% of all LGIB in children younger than 2

50

16

Most sensitive study to diagnose a Meckel diverticulum

Meckel radionuclide scan using technetium-99m pertechnetate

17

Uptake of technetium-99m pertechnetate by ectopic gastric mucosa of Meckel diverticulum can be enhanced by

Cimetidine, ranitidine, glucagon, pentagastrin

18

Sensitivity and specificity of enhanced Meckel scan

85% and 95%

19

False-negative scan may be seen in what condition

Anemia

20

Method of detection of Meckel diverticulum that is best done when the patient is actively bleeding

Radiolabeled tagged RBC scan

21

Treatment of a symptomatic Meckel diverticulum

Surgical excision/diverticulectomy

22

Risk of serious complication from Meckel diverticulum seem to exceed operative risk in children of what age group

Younger than 8 years old