Unit 2 Case 2: GERD Flashcards
anatomy of the oesophagus
C6 to T11
adventitia
muscularis externa
submucosa
mucosa
musculares externa in the superior third
voluntary striated muscle
musculares externa in the middle third
voluntary striated and smooth
muscularis externa in the inferior third
smooth muscle
layers in the muscularis externa of the stomach q
longitudinal
circular
oblique
4 regions of the stomach
cardia- surrounds opening of the oesophagus
fundus-area above the cardinal orifice
body-largest region
pylorus- stomach to the duodenum
2 sphincters inside of the stomach
inferior oesophageal
pyloric
inferior oesophageal sphincter
transition between stomach and oesophagus at T11
food passes from oesophagus through cardiac orifice and into body of the stomach
pyloric sphincter
lies between pylorus and start of the duodenum
controms exit of chyme (food and gastric acid mixture)
3 sublayers of the mucosa of the oesophagus
stratified squamous non-keratinised epithelium
lamina propria
muscularis mucosa
stratified squamous non-keratinised epithelium
mucous production
for lubrication and neutralisation of acid
protection
lamina propria
absorption via the capillaries
contains MALT for immune response
muscularis mucosa
for localised movement
uses muscular contraction
submucosa
large network of blood vessels
increases SA for nutrient absorption
mucus glands for lubrication of bolus
Meissen nerve cells to control effectors
histology of the stomach
simple columnar
what occurs in the fundus and the body of the stomach
the epithelial lining invaginate
forming gastric pits
cells that the gastric pits contain
surface lining
regenerative
mucous neck cells
parietal
chief
regenerative cells
replace any of the other cells
mucous neck cells
secrete mucous and neutralise acid
parietal cells
release hydrochloric acid, intrinsic factor and gastrin
chief cells
secretes pepsinogen and HCl converts pepsinogen to pepsin, active form
what is GERD
stomach contents regurgitate up into the oesophagus
oesophageal sphincter is in a relaxed state
impaired lower oesophageal sphincter mechanism
intragastric pressure
delayed gastric emptying