Stomach and Peptic Ulcer Disease Overview
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Stomach and Peptic Ulcer Disease Overview

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Questions and Answers

Which of the following substances stimulates gastric secretion?

  • Histamine (correct)
  • Duodenal acid
  • Somatostatin
  • H.pylori
  • What is one of the primary functions of the gastric mucosa?

  • Storage of nutrients
  • Temperature regulation of ingested substances
  • Secretion of intrinsic factor
  • Barrier against pathogens (correct)
  • Which of the following is a common cause of Peptic Ulcer Disease?

  • High protein diet
  • Excessive exercise
  • Dehydration
  • H.pylori infection (correct)
  • Which complication is associated with gastritis?

    <p>Life-threatening bleeding</p> Signup and view all the answers

    Which medication class is used to reduce stomach acid secretion?

    <p>Antisecretory drugs</p> Signup and view all the answers

    What risk factor is associated with duodenal ulcers?

    <p>Excess acid and pepsin</p> Signup and view all the answers

    Which sphincter is located at the entrance of the stomach?

    <p>Lower esophageal sphincter</p> Signup and view all the answers

    What is a key treatment for immediate support in cases of severe gastritis?

    <p>Fluid resuscitation</p> Signup and view all the answers

    What is the primary trigger for systemic activation during the third phase of acute pancreatitis?

    <p>Systemic activation of the immune system</p> Signup and view all the answers

    Which of the following symptoms is NOT directly associated with acute pancreatitis?

    <p>Hypercalcemia</p> Signup and view all the answers

    What is the most common cause of chronic pancreatitis?

    <p>Alcohol abuse</p> Signup and view all the answers

    Which electrolyte imbalance is commonly associated with chronic pancreatitis?

    <p>Hypomagnesemia</p> Signup and view all the answers

    Which treatment is indicated for managing fluid resuscitation in acute pancreatitis?

    <p>Providing nutritional support early</p> Signup and view all the answers

    What is NOT a component of the 'classic triad' associated with the diagnosis of chronic pancreatitis?

    <p>Hypomagnesemia</p> Signup and view all the answers

    In acute pancreatitis, which factor can mimic a myocardial infarction (MI)?

    <p>Severe pain</p> Signup and view all the answers

    Which condition is likely to develop in approximately half of patients suffering from chronic pancreatitis?

    <p>Diabetes mellitus</p> Signup and view all the answers

    What is the primary focus of medical therapy for peptic ulcer disease?

    <p>H.pylori eradication</p> Signup and view all the answers

    Which medication is NOT considered a proton pump inhibitor?

    <p>Cimetidine</p> Signup and view all the answers

    What is a potential complication of using antacids?

    <p>Milk-alkali syndrome</p> Signup and view all the answers

    Which of the following is a potential side effect of H2-receptor antagonists?

    <p>Altered drug metabolism</p> Signup and view all the answers

    In what scenario is surgical intervention considered for patients with peptic ulcer disease?

    <p>Persistent symptoms despite medication</p> Signup and view all the answers

    What is a common symptom of gastric neoplastic disease?

    <p>Hematemesis</p> Signup and view all the answers

    Which therapeutic option is specifically aimed at preventing ulcers in NSAID users?

    <p>Misoprostol</p> Signup and view all the answers

    What significant alteration should be considered when administering H2-receptor antagonists?

    <p>Adjustment of dosage for kidney function</p> Signup and view all the answers

    What is a primary reason for performing a total pancreatectomy?

    <p>Tumors (benign or malignant)</p> Signup and view all the answers

    Which layer of the small intestine contains immune cells and helps protect against pathogens?

    <p>Lamina propria</p> Signup and view all the answers

    What is the role of the Auerbach plexus in the small intestine?

    <p>Regulates motility and secretion</p> Signup and view all the answers

    During a partial pancreatectomy, which organ is NOT typically removed?

    <p>Spleen</p> Signup and view all the answers

    What type of anesthesia is generally preferred for a pancreatectomy procedure?

    <p>General endotracheal with muscle relaxants</p> Signup and view all the answers

    Which function is associated with the sympathetic nervous system in the context of the small intestine?

    <p>Inhibits motility</p> Signup and view all the answers

    What type of pain management might be used postoperatively for patients undergoing pancreatectomy?

    <p>Epidural or intrathecal morphine</p> Signup and view all the answers

    What is the primary muscle type found in the muscularis propria of the small intestine?

    <p>Smooth muscle</p> Signup and view all the answers

    What is the primary distinction between maldigestion and malabsorption?

    <p>Maldigestion specifically involves breakdown issues, whereas malabsorption refers to absorption issues.</p> Signup and view all the answers

    Which symptom is most indicative of maldigestion?

    <p>Steatorrhea (fatty stool)</p> Signup and view all the answers

    Which of the following is NOT a potential cause of pancreatic insufficiency?

    <p>Ileostomy</p> Signup and view all the answers

    What is the main function of the large intestine?

    <p>Store and expel waste</p> Signup and view all the answers

    Which artery is NOT involved in the blood supply to the large intestine?

    <p>Celiac trunk</p> Signup and view all the answers

    Which statement regarding electrolyte absorption in the large intestine is accurate?

    <p>Sodium loss after colectomy can exceed compensatory capacity of the small intestine.</p> Signup and view all the answers

    What structures are considered parts of the large intestine?

    <p>Cecum, appendix, colon, rectum, anal canal</p> Signup and view all the answers

    Which type of inflammatory bowel disease primarily affects the distal ileum and proximal colon?

    <p>Crohn's disease</p> Signup and view all the answers

    Study Notes

    Stomach

    • Stimulated by acetylcholine, gastrin, and histamine
    • Inhibited by somatostatin, duodenal acid, and negative feedback from gastrin
    • Contains glands responsible for various functions
      • Fundus: Secretes mucus for protection and hydrochloric acid for digestion
      • Antrum: Secretes mucus for protection and gastrin (a hormone)
      • Sphincters: Lower esophageal sphincter (LES) and pyloric sphincter
    • Stores up to 1.5 liters of fluid
    • Food storage up to 4 hours
    • Other functions:
      • Barrier against pathogens (acidic environment and immune function)
      • Temperature regulation of ingested substances
      • Secretion of intrinsic factor (for vitamin B12 absorption)

    Peptic Ulcer Disease

    • Loss of stomach lining due to inflammation, can extend deeper into the stomach wall
    • Types: Acute vs. Chronic (most common)
    • Causes:
      • H. pylori infection (most common)
      • NSAID use
    • Complications: Hemorrhage, perforation, obstruction
    • Duodenal ulcers:
      • More common in men 45-65 and women >55
      • Caused by excess acid and pepsin
      • Can involve the lower stomach

    Gastritis

    • Inflammatory disorder of the stomach lining (gastric mucosa)
    • Also called stress ulcers, erosive gastritis, or hemorrhagic gastritis
    • Can cause life-threatening bleeding
    • Causes:
      • Multifactorial: physical trauma, shock, sepsis, medications, chemicals, or H. pylori infection
      • Reduced blood flow, mucus, or bicarbonate secretion
      • Reduced prostaglandins
      • Stress: Hypoxia, sepsis, or organ failure
    • Symptoms: Upper GI bleeding

    Therapeutic Options in Peptic Ulcer Disease

    • Goals:
      • Relieve symptoms
      • Heal the ulcer
      • Prevent recurrence
      • H. pylori eradication: Main focus of medical therapy
    • Medications:
      • Antacids: Short-term symptom relief, can cause acid rebound and milk-alkali syndrome
      • H2-receptor antagonists: Block acid secretion, adjust dosage for kidney function, potential side effects include altered drug metabolism, mental confusion, and decreased blood flow
      • Proton pump inhibitors: Most effective acid blockers
      • Sucralfate: Promotes healing and protects the ulcer, minimal side effects
      • Misoprostol: Prevents ulcers in NSAID users, minimal side effects
      • Antibiotics: Eradicate H. pylori
    • Surgery: Reserved for intractable symptoms despite medication. Complications: bleeding, perforation, obstruction

    Gastric Neoplastic Disease

    • Second most common cancer worldwide
    • Causes:
      • Alcohol abuse
      • Gallstones
      • Other factors: trauma, infections, medications

    Acute Pancreatitis

    • Causes:
      • Alcohol abuse
      • Gallstones
      • Other factors: trauma, infections, medications
    • Symptoms:
      • Pain (severe, radiating)
      • Nausea, vomiting, and fever
      • Hypotension
    • Treatment:
      • Fluid resuscitation
      • Pain management (avoid morphine)
      • Nutritional support
      • Surgery (for gallstones)
    • CRP level
    • Anesthetic:
      • Choice depends on patient presentation
      • Anticipate labile hemodynamics and altered hepatic function

    Chronic Pancreatitis

    • Permanent damage to the pancreas with inflammation, scarring, and tissue destruction
    • Causes:
      • Most common: Alcohol abuse (70% of cases)
      • Other causes: Smoking, genetics, autoimmune disease, duct obstruction
    • Diagnosis:
      • Classic triad: steatorrhea, pancreatic calcification, diabetes mellitus
      • Steatorrhea only occurs with very low lipase secretion
    • Reasons for surgery:
      • Ductal obstruction
      • Pancreatic stones or cysts
      • Trauma
      • Tumors (benign or malignant)
      • Chronic pancreatitis
      • Endocrine tumors
    • Surgery types:
      • Partial pancreatectomy: Removes part of pancreas, duodenum, gallbladder, and bile duct.
      • Total pancreatectomy: Removes part of stomach, gallbladder, bile duct, spleen, lymph nodes, and entire pancreas.
    • Anesthesia:
      • General endotracheal preferred, with muscle relaxants.
      • Avoid nitrous oxide.
      • Epidural or intrathecal morphine for pain control
    • Postoperative care:
      • May require ventilation and ICU monitoring due to surgery duration and patient health

    Small Intestine

    • Layers:
      • Serosa: Outermost layer, single layer of cells.
      • Muscularis propria: Composed of smooth muscle for contraction.
        • Auerbach plexus: Between muscle layers, controls motility and secretion.
      • Submucosa: Strongest layer, contains connective tissue and:
        • Meissner plexus: Regulates blood flow, motility, and secretions.
      • Mucosa: Innermost layer, with folds and villi for increased surface area:
        • Muscularis mucosae: Thin muscle layer separating mucosa and submucosa.
        • Lamina propria: Connective tissue with immune cells and support functions.
        • Epithelial layer: Covers villi and crypts, contains various cell types for absorption.
    • Immune function:
      • Lamina propria: Has immune cells for protection.
      • IgA antibodies: In lamina propria prevent pathogen entry.
    • Nervous system:
      • Autonomic nervous system:
        • Parasympathetic: Increases motility and secretions.
        • Sympathetic: Inhibits motility and causes vasoconstriction.
      • Enteric nervous system: Intrinsic neurons within the wall of the small intestine, pancreas, and gallbladder, controls local functions like digestion and peristalsis.
    • Motility: Intestinal reflexes regulate movement and emptying.
    • Absorption: Absorptive cells take up nutrients.

    Maldigestion vs. Malabsorption

    • Maldigestion: Refers specifically to the breakdown issue.
    • Malabsorption: Refers to the absorption issue.

    Causes of Maldigestion

    • Pancreatic deficiency
    • Lactase deficiency
    • Bile salt deficiency

    Pancreatic Insufficiency

    • Usually present due to its large functional reserve.
    • Other causes:
      • Cystic fibrosis
      • Fistulas
      • Gallstones
      • Ischemic enteritis
      • Neoplastic diseases
      • Diabetes mellitus
      • Vitamin B6 or B12 deficiency

    Key Symptom of Maldigestion

    • Steatorrhea (fatty stool)

    Large Intestine

    • Anatomy:
      • Length: 3-5 feet
      • Parts: Cecum, appendix, colon, rectum, anal canal
    • Blood Supply:
      • Arteries: Superior mesenteric, inferior mesenteric, internal iliac
      • Veins: Drain into portal venous system (except rectum)
    • Lymphatic Drainage:
      • Upper rectum and colon: Superior rectal and inferior mesenteric nodes
      • Lower rectum and anal canal: Inguinal lymph nodes
    • Innervation:
      • Motor and secretory control: Myenteric plexus
      • Sympathetic: T10-T12 (right), L1-L3 (left), presacral nerves (rectum)
      • Parasympathetic: Vagus nerve (right & transverse colon), S2-S4 (descending colon, sigmoid colon, and rectum)
    • Functions:
      • Store and expel waste
      • Absorb water and sodium (mostly in the right colon)
      • Efficient absorption: Only 100-200mL out of 1-2L daily fluid reaches the end
      • Importance: Individuals with ileostomy need extra sodium intake
    • Electrolyte Balance
      • Sodium: Actively reabsorbed, efficient process (5 mEq/day needed for balance)
      • Potassium: Passively absorbed/secreted, lost in mucoid stools (colitis, villous adenoma)
      • Chloride: Absorbed with sodium, exchanged for bicarbonate

    Inflammatory Bowel Disease

    • Types:
      • Crohn's disease: Affects any part of the GI tract, often the distal ileum and proximal colon.

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    Description

    Explore the anatomy and physiology of the stomach, including its functions and hormones. Additionally, delve into peptic ulcer disease, its types, causes, and potential complications. This quiz covers essential concepts related to stomach health and related disorders.

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