Stomach Flashcards
What space lies behind the stomach?
Lesser sac; the pancreas lies behind the stomach
What is the opening into the lesser sac?
Foramen of Winslow
What are the folds of gastric mucosa called?
Rugae
What do gastric parietal cells produce?
HCl; intrinsic factor
What do gastric chief cells produce?
Pepsinogen
PEPpy chief
What do mucous neck cells produce?
Bicarbonate; mucus
What do G cells produce?
Gastrin
Where are G cells located?
Antrum of stomach
What is pepsin?
Proteolytic enzyme that hydrolyzes peptide bonds
What is intrinsic factor?
Protein secreted by the parietal cells that combines with vitamin B12 and allows for absorption in the terminal ileum
What is GERD?
Excessive reflux of gastric contents into the esophagus
What is pyrosis?
Medical term for heartburn
What are the causes of GERD?
Decreased LES tone; decreased esophageal motility to clear refluxed fluid; gastric outlet obstruction; hiatal hernia
What are the signs and symptoms of GERD?
Heartburn, regurgitation, respiratory problems, aspiration pneumonia, substernal pain
What disease must be ruled out when the symptoms of GERD are present?
CAD
What tests are included in the workup of GERD?
EGD; UGI contrast study with esophagogram; 24-hour acid analysis; manometry; EKG; CXR
What is the medical treatment for GERD?
Small meals; PPIs; H2 blockers; elevation of head at night and no meals prior to sleeping
What are the indications for surgery with GERD?
Intractability; respiratory problems as a result of reflux and aspiration of gastric contents; severe esophageal injury
What is Barrett’s esophagus?
Columnar metaplasia from the normal squamous epithelium as a result of chronic irritation from reflux
What is the major concern with Barrett’s esophagus?
Developing cancer
What type of cancer develops in Barrett’s esophagus?
Adenocarcinoma
What percentage of patients with GERD develops Barrett’s esophagus?
10%
What percentage of patients with Barrett’s esophagus will develop adenocarcinoma?
7%
What is the treatment of Barrett’s esophagus with dysplasia?
Nonsurgical: endoscopic mucosal resection and photodynamic therapy
Also: radiofrequency ablation, cryoablation
What is a Lap Nissen procedure?
360 degree fundoplication (2 cm long)
What is a Belsey mark IV procedure?
240-270 degree fundoplication performed through a thoracic approach
What is a Hill procedure?
Arcuate ligament repair (close large esophageal hiatus) and gastropexy to diaphragm
What is a Toupet procedure?
Incomplete (200 degree) posterior wrap often used with severe decreased esophageal motility
How does the Nissen wrap work?
- Increasing LES tone
- Elongating LES (3 cm)
- Returning LES into abdominal cavity
In what percentage of patients with GERD does Lap Nissen work?
85%
What are the post-operative complications of Lap Nissen?
Gas-bloat syndrome, stricture, dysphagia, spleen injury requiring splenectomy, esophageal perforation, pneumothorax
What is gas-bloat syndrome?
Inability to burp or vomit
What is the incidence of gastric cancer?
In US: 10/100,000
In Japan: 78/100,000
What are the associated risk factors for gastric cancer?
Diet (e.g. smoked meats, high nitrates, low fruits and vegetables, alcohol, tobacco).
Environment (e.g. high-risk area, poor SES, atrophic gastritis, male, type A blood, partial gastrectomy, pernicious anemia, polyps, H. pylori)
What is the average age at the time of discovery of gastric cancer?
> 60 years
What is the male:female ratio for gastric cancer?
3:2