Upper GI Disorders

Core Explanation

GERD (gastroesophageal reflux disease). Normally, a muscular valve (the lower esophageal sphincter) keeps stomach contents from flowing back up. In GERD, stomach acid repeatedly flows back (refluxes) into the esophagus, irritating its lining. Because the esophagus isn't protected against acid like the stomach is, this causes:

• Heartburn (burning chest discomfort), regurgitation, and sometimes cough or a sour taste.
• Symptoms often worsen after meals, lying down, or with certain foods.

Contributing factors include a weak or relaxed sphincter, obesity, certain foods, and hiatal hernia. Over time, chronic reflux can damage the esophagus (esophagitis) and, in some cases, cause precancerous changes (Barrett's esophagus — recall metaplasia). Management includes lifestyle changes (diet, weight, not lying down after eating) and acid-reducing medications (antacids, H2 blockers, proton pump inhibitors).

Peptic ulcer disease (PUD). A peptic ulcer is a sore (erosion) in the lining of the stomach (gastric ulcer) or the first part of the small intestine (duodenal ulcer), where stomach acid and digestive enzymes have damaged the protective lining. Normally, the stomach lining is protected from its own acid by a mucus barrier; ulcers form when the balance between acid and protection is disrupted.

Main causes of PUD. Two causes dominate (an important, evidence-based point):

• **Helicobacter pylori (H. pylori) infection — a bacterium that damages the protective lining; a leading cause of peptic ulcers (recall Microbiology). It's treatable with antibiotics**.
• NSAIDs (nonsteroidal anti-inflammatory drugs, e.g., ibuprofen, aspirin) — these reduce protective prostaglandins in the stomach lining (recall biochemistry/prostaglandins), making ulcers more likely with regular use.

(Note: contrary to older belief, stress and spicy food are not primary causes of ulcers, though they can worsen symptoms.)

Symptoms and complications. Ulcers often cause burning abdominal pain (timing may relate to meals), and can cause complications: bleeding (which can be serious — recall GI bleeding), perforation, or obstruction. Management targets the cause: treating H. pylori (antibiotics), stopping/reducing NSAIDs, and acid-reducing medications.

How It Works

Upper GI disorders:

GERD = stomach acid refluxes into ESOPHAGUS (weak lower esophageal sphincter) → heartburn, regurgitation
   worse after meals/lying down; chronic → esophagitis, Barrett's esophagus (metaplasia)
   manage: lifestyle + acid-reducers (antacids, H2 blockers, PPIs)
PEPTIC ULCER DISEASE = sore in stomach (gastric) or duodenum lining (acid/enzymes damage protective barrier)
   MAIN CAUSES: H. PYLORI (bacterium, leading cause, treat with antibiotics) + NSAIDs (reduce protective prostaglandins)
   NOT primarily stress/spicy food (older myth)
   symptoms: burning abdominal pain; complications: BLEEDING, perforation, obstruction
   manage: treat H. pylori, stop NSAIDs, acid-reducers

Important Relationships and Comparisons

High-Yield Pre-Nursing Connections

GERD and PUD are very common — nurses teach lifestyle changes and manage acid-reducing medications (PPIs, H2 blockers). The H. pylori and NSAID causes of ulcers are high-yield (connecting to Microbiology and to prostaglandins/NSAIDs from biochemistry) — and ulcers can be cured by treating H. pylori. Recognizing GI bleeding (a serious ulcer complication) is important. Barrett's esophagus connects to metaplasia and cancer risk. Understanding these guides patient education (avoiding triggers, careful NSAID use).

Quick Recap

• GERD is chronic reflux of stomach acid into the esophagus (from a weak lower esophageal sphincter), causing heartburn; chronic reflux can cause esophagitis and Barrett's esophagus (metaplasia).
• Peptic ulcer disease is a sore in the stomach or duodenum where acid damages the protective lining.
• The *main causes of ulcers are H. pylori* infection (treated with antibiotics) and NSAIDs (reduce protective prostaglandins) — not** primarily stress or spicy food.
• Complications include GI bleeding; management targets the cause (treat H. pylori, reduce NSAIDs) plus acid-reducing medications.

Common Confusions

• GERD (acid reflux into esophagus) vs. peptic ulcer (sore in stomach/duodenum).
• Ulcers are mainly caused by H. pylori and NSAIDs — not primarily stress or spicy food.
• H. pylori ulcers are treated with antibiotics (they're an infection).
• GI bleeding is a serious ulcer complication.