Tutorial title - Stomach
17 important questions on Tutorial title - Stomach
What are the diagnostic tests for peptic ulcer disease related to H. pylori?
- Urea Breath Test: Indicates active infection. Urea with radioactive carbon is used to test for radioactive carbon in breath (CO₂).
- Blood Test: Detects Ag or Ab, does not distinguish between active or past infection.
How is visualization used in diagnosing peptic ulcer disease?
- Gastroscopy/Upper Endoscopy.
- Upper GI series (Barium Swallow +Gastrografin): X-ray that detects larger ulcers.
What are is NSAID-induced gastritis and the clinical features of all types of gastritis?
Caused by cyclooxygenase inhibition which will decrease prostaglandin (E1 and E2) production which are protective factors that stimulate almost all the other protective factors.
Greatest with nonselective inhibitory drugs e.g. Apsirin..
Clinical features of NSAID-induced gastritis include:
- Asymptomatic (acute gastritis).
- Epigastric pain with lack of reduction, food-related.
- Abdominal bloating
- Vomiting
- Nausea
- Melena
- Hematemesis
Epigastric pain with fat food-related issues indicates gall bladder issues.
Epigastric pain with radiation to the arms indicates MI.
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What conditions are associated with stress-related mucosal disease?
- severe trauma
- extensive burns
- intracranial disease
- major surgery
What are the manifestations of chronic gastritis?
- Peptic ulcer disease (gastric or duodenal). These are punched out lesions secondary to hyperacidicity.
- Atrophic gastritis (antrum or corpus area).
- Gastric outlet obstruction (adenocarcinoma).
- Intestinal metaplasia.
- Common infection with H. pylori.
- Peptic ulcer features similar to gastritis except more severe i.e. Hematemesis, melena, epigastric chest pain without rediation (food related), vomiting, nausea
What is the treatment approach for peptic ulcer disease?
- Triple Therapy:
- Protect lining of stomach (Antacids - proton pump inhibitors like omeprazole)
- Elimination of H. pylori (Antibiotics - amoxicillin + clarithromycion or clarithromycin + metronidazole as alternative).
What are the types of ulcers associated with stress-related mucosal disease?
- Stress ulcers - Affect critically ill patients with shock, sepsis, or severe trauma.
- Curling ulcers - Occur in proximal duodenum, associated with severe burns or trauma.
- Cushing ulcers - Stomach, duodenum, or esophagus; associated with intracranial disease, high incidence of perforation.
What are the complications of peptic ulceration?
- Hemorrhage.
- Perforation leading to peritonitis (Bilateral air under the diaphragm).
- Penetration into another organ.
- Obstruction due to malignancy (Hourglass deformity causing vomiting following meals).
Red flags:
- early satiety
- vomiting with each meal
- unexplained progressive weight loss.
What are the characteristics of gastric ulcers?
- Worsen with food ingestion.
- Progressive weight loss.
- Located in the stomach lining.
What is gastritis, gastropathy and what are its causes and protective factors?
Gastritis is the inflammation of the gastric mucosa due to extensive injury with presence of neutrophils.
Gastropathy is minimal injury to gastric mucosa without inflammation and there is regeneration. No or absent inflammatory cells.
Causes include:
- H. pylori infection
- NSAIDs
- Extreme hyperacidity
- Tobacco
- Alcohol
Absolute hyperacidity is when there are normal protective factors and increased acid (H. Pylori).
Relative hyperacidity is when there is deficiency in protective factors but normal acid (NSAIDs).
Protective factors:
- mucus surface secretions,
- prostaglandin synthesis,
- epithelial regenerative capacity,
- bicarbonate secretion and mucus.
Describe gastropathy and its characteristics.
Gastropathy involves minimal injury without inflammation and then its regeneration.
It is characterized by:
- No or absent inflammatory cells
What are the differential diagnoses for a punched-out lesion?
- Syphilis.
What is the pathogenesis of stress-related mucosal disease?
- Ischemia due to local edema.
- Caused by systemic hypotension or blood flow due to splanchnic vasoconstriction.
- Upregulation and release of the vasoconstrictor endothelin-1 also contributes.
How do duodenal ulcers differ from gastric ulcers?
- Relief with food ingestion due to increased HCO₃ production (CCK).
- Progressive weight gain.
- Located in the 1st part of the small intestines.
Explain autoimmune gastritis and its complications.
What are the clinical features of stress-related mucosal disease?
- Nausea
- Vomiting
- Melena
- Coffee-ground hematemesis
What is H. pylori-induced gastritis and how does it affect the stomach?
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