Md1 Embryology Block 3 Digestive Track Part B Mesenteries Of Stomach

Front 1

►Mesenteries are double layers of

Back 1

peritoneum

Front 2

Mesenteries are double layers of peritoneum
provide a pathway for =
3ct

Back 2

blood vessels
nerves
lymphatics

Front 3

A ventral mesentery or ventral mesogastrium attaches the stomach and duodenum to =

Back 3

liver
ventral abdominal wall.

Hint 3

Front 4

Review

Back 4

Review

Hint 4

Review

Front 5

Classic GI Obstruction =
4ct
At Pyloris

Back 5

Abdominal Distention
Abd-Px
Emisis
Absolute Constipation

Front 6

Age related Gastric outlet obstructions are typically =

Back 6

NB- CongenitalHyperplasia of pylorus
Elderly = Gastro Carcinoma
Younger Pt 20s = Ulcer

Front 7

4 layers of Gastro epithelial layers

Back 7

Mucosa
Submucosa
Muscularis
Serosa

Front 8

Development of Stomach dbls up from =

Back 8

distal part of the foregut

Front 9

___________ border of the stomach grows faster than its
_________ _________.

Back 9

dorsal
ventral border

Front 10

As the stomach enlarges
and acquires its adult
shape, it slowly rotates

Back 10

90
degrees in a clockwise
direction around its
longitudinal axis

Hint 10

The effects of rotation on the stomach are
The ventral border (lesser curvature) moves to the right and the dorsal border (greater curvature) moves to the left

Front 11

Surface mucous cells lining the stomach, mucous neck cells, parietal cells, chief cells, and enteroendocrine cells comprising the gastric glands of the definitive stomach are derived from =

Back 11

endoderm

Hint 11

source: BRS, page 101, 3rd edi

Front 12

The lamina propria; muscularis mucosae; submucosa; the outer longitudinal, middle circular, and inner oblique layers of smooth muscle of the muscularis externa; and the serosa of the definitive stomach are derived from visceral =

Back 12

mesoderm

Front 13

Congenital Hypertrophic Pyloric Stenosis aka

Back 13

Gastric outlet obstruction

occurs when the muscularis externa in the pyloric region hypertrophies, causing a narrow pyloric lumen that obstructs food passage.

Front 14

In Pyloric Stenosis- ________ _______
in the pyloric region hypertrophies,

Back 14

muscularis externa

Front 15

Vomiting usually starts around __
weeks of age

Back 15

3

The infant is hungry after vomiting and wants to feed again

Front 16

Congenital Hypertrophic Pyloric Stenosis S/S

Back 16

Abdominal pain
Belching ( the release of gas from the GIT through the mouth).
Constant hunger
Dehydration , UO ▼
Failure to gain weight or weight loss
Wave-like motion of the abdomen shortly after feeding and just before vomiting occurs

Front 17

Exams and Tests
The condition is usually diagnosed before the baby is 6 months old.

Back 17

The infant may have a swollen belly
O/E: abnormal pylorus, which feels like an olive-shaped mass, when touching the stomach area.
ultrasound of the abdomen may be the first imaging test performed.

Front 18

Congenital Hypertrophic Pyloric Stenosis :
Alternative Names
Hypertrophic pyloric stenosis; Gastric outlet obstruction

Back 18

Hypertrophic pyloric stenosis; Gastric outlet obstruction

Front 19

Congenital Hypertrophic Pyloric Stenosis
occurs when the

Back 19

muscularis externa in the pyloric region hypertrophies,

causing a narrow pyloric lumen that obstructs food passage.

Front 20

Congenital Hypertrophic Pyloric Stenosis
is associated clinically with

Back 20

projectile, nonbilious vomiting after feeding
a small, palpable mass at the right costal margin;
increased incidence has been found in infants treated with the antibiotic,
erythromycin

Front 21

Congenital Hypertrophic Pyloric Stenosis

Vomiting usually starts around __ weeks of age

Back 21

3 wks

Front 22

Congenital Hypertrophic Pyloric Stenosis
Treatment for pyloric stenosis involves surgery =

Back 22

pyloromyotomy

Front 23

Early in the -- week the duodenum begins to develop

Back 23

4th wk

The junction of the two parts
of the duodenum is just distal
to the origin of the

Hint 23

bile duct.

Front 24

______ artery which supplies foregut

Back 24

Celiac

Front 25

____ _____ arteries which supplies midgut.

Back 25

Superior mesenteric

Front 26

Anomalies of Duodenum
2ct

Back 26

Duodenal Atresia is what =

Duodenal Stenosis s what =

Hint 26

not developed properly
(failure of recanalization).

Incomplete recanalization

Front 27

Incomplete recanalization of the duodenal lumen =

Back 27

Duodenal stenosis :

Front 28

duodenum) has not developed properly
(failure of recanalization).

Back 28

Duodenal Atresia :

Front 29

Duodenal Atresia/ Duodenal stenosis:

Congenital anomalies often associated with Duodenal atresia/stenosis are

Back 29

Down syndrome
Anular pancreas
Cardiovascular anomalies
Anorectal anomalies

The big anomolie is =

Hint 29

Polyhydraminos

Front 30

--%- __% of all infants with duodenal atresia have Down syndrome

Back 30

20-40%

Front 31

incidence of duodenal atresia is 1 per
live births

Back 31

2500-5000

Front 32

Investigations:
for
Duodenal Atresia/ Duodenal stenosis:

Back 32

A fetal ultrasound --

An abdominal x-ray may show air in the stomach

Hint 32

polyhydramnios

double-bubble sign
air in stomach and duodenum.

Front 33

Since the closure of the duodenum is complete in duodenal atresia, no air is seen

Back 33

distal to the duodenum

Front 34

__ __ __ arise as a ventral outgrowth from the caudal part of the foregut
early in the __ week

Back 34

liver
gallbladder
biliary duct system

4th wk