NR 507 WEEK 5 EDAPT PEPTIC ULCER DISEASE
ADVANCED PATHOPHYSIOLOGY
(CHAMBERLAIN UNIVERSITY)
NR 507: WEEK 5 EDAPT: PEPTIC ULCER DISEASE
PUD is commonly associated with Helicobacter pylori (H. pylori) bacterial infection. H. pylori can colonize
the gastric mucosa, leading to chronic inflammation and disruption of the mucosal barrier. This can
result in increased acid secretion, impaired mucus production, and the development of ulcers.
Rationale for the Correct Answer:
✔ Helicobacter pylori (H. pylori) infection
H. pylori is a gram-negative bacterium that colonizes the gastric mucosa and is one of the primary causes
of peptic ulcer disease. It contributes to ulcer formation through several mechanisms:
Produces urease, which converts urea to ammonia, allowing the organism to survive in the acidic
gastric environment.
Causes chronic inflammation of the gastric mucosa (gastritis).
, Disrupts the protective mucosal barrier.
Increases gastric acid secretion (especially in duodenal ulcers).
Weakens epithelial defenses, making the mucosa more susceptible to acid and pepsin injury.
The imbalance between aggressive factors (acid, pepsin, bacterial toxins) and protective mechanisms
(mucus, bicarbonate, prostaglandins, mucosal blood flow) leads to ulcer formation.
Nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen are well-known risk factors for PUD.
Regular and prolonged use of NSAIDs can interfere with the protective mechanisms of the
gastrointestinal mucosa, leading to the development of ulcers.
Excessive alcohol consumption is a recognized risk factor for PUD. Alcohol can irritate the gastric
mucosa and increase the production of gastric acid, contributing to the development of ulcers.
Advancing age is associated with an increased risk of PUD. Older individuals may experience changes
in the mucosal lining of the stomach that make them more susceptible to ulcers.
A family history of PUD suggests a potential genetic predisposition. Genetic factors may influence an
individual's susceptibility to developing ulcers.
, Zollinger-Ellison syndrome causes an increased risk of peptic ulcers due to the increased
production of gastric acid resulting from the presence of gastrin-secreting tumors.
Mucosa
Mucosa:
Surface epithelium: The innermost layer of the mucosa is the surface epithelium, composed mainly of
mucous cells. These cells secrete mucus, forming a protective barrier that prevents the stomach's
acidic contents from damaging the underlying tissues.
ADVANCED PATHOPHYSIOLOGY
(CHAMBERLAIN UNIVERSITY)
NR 507: WEEK 5 EDAPT: PEPTIC ULCER DISEASE
PUD is commonly associated with Helicobacter pylori (H. pylori) bacterial infection. H. pylori can colonize
the gastric mucosa, leading to chronic inflammation and disruption of the mucosal barrier. This can
result in increased acid secretion, impaired mucus production, and the development of ulcers.
Rationale for the Correct Answer:
✔ Helicobacter pylori (H. pylori) infection
H. pylori is a gram-negative bacterium that colonizes the gastric mucosa and is one of the primary causes
of peptic ulcer disease. It contributes to ulcer formation through several mechanisms:
Produces urease, which converts urea to ammonia, allowing the organism to survive in the acidic
gastric environment.
Causes chronic inflammation of the gastric mucosa (gastritis).
, Disrupts the protective mucosal barrier.
Increases gastric acid secretion (especially in duodenal ulcers).
Weakens epithelial defenses, making the mucosa more susceptible to acid and pepsin injury.
The imbalance between aggressive factors (acid, pepsin, bacterial toxins) and protective mechanisms
(mucus, bicarbonate, prostaglandins, mucosal blood flow) leads to ulcer formation.
Nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen are well-known risk factors for PUD.
Regular and prolonged use of NSAIDs can interfere with the protective mechanisms of the
gastrointestinal mucosa, leading to the development of ulcers.
Excessive alcohol consumption is a recognized risk factor for PUD. Alcohol can irritate the gastric
mucosa and increase the production of gastric acid, contributing to the development of ulcers.
Advancing age is associated with an increased risk of PUD. Older individuals may experience changes
in the mucosal lining of the stomach that make them more susceptible to ulcers.
A family history of PUD suggests a potential genetic predisposition. Genetic factors may influence an
individual's susceptibility to developing ulcers.
, Zollinger-Ellison syndrome causes an increased risk of peptic ulcers due to the increased
production of gastric acid resulting from the presence of gastrin-secreting tumors.
Mucosa
Mucosa:
Surface epithelium: The innermost layer of the mucosa is the surface epithelium, composed mainly of
mucous cells. These cells secrete mucus, forming a protective barrier that prevents the stomach's
acidic contents from damaging the underlying tissues.
