Gastrointestinal System Review

Gastrointestinal System

Alimentary Canal

• Length: 30 feet

• Components:
    - Mouth
    - Pharynx
    - Esophagus
    - Small intestine
    - Large intestine
    - Anus

• Function: Peristalsis (involuntary constriction and relaxation of the muscles of the intestine or another canal)

• Accessory organs:
    - Teeth
    - Tongue
    - Liver
    - Gallbladder
    - Pancreas
    - Salivary glands

Accessory Digestive Organs

• Parotid salivary gland

• Sublingual salivary gland

• Submandibular salivary gland

• Digestive Organs:
    - Liver
    - Gallbladder
    - Pancreas

• Gastrointestinal Tract (Digestive Organs):
    - Oral cavity
    - Pharynx
    - Esophagus
    - Stomach
    - Duodenum
    - Small intestine
    - Cecum
    - Appendix
    - Rectum
    - Anal canal
    - Anus

Normal Gastrointestinal Findings

• Data collection for findings that suggest a healthy GI system is crucial, though specifics were not provided in the transcript.

Diagnostic Exams

• Types of diagnostic exams include:
    - Gastric content analysis
    - Occult blood testing
    - Bacterial culture
    - Barium swallow
    - Upper GI test
    - Endoscopy (EGD)
    - Colonoscopy
    - Barium enema study

• Pre and post procedural nursing interventions are necessary for patient safety and comfort.

Barium Swallowing

• Example provided in the transcript but lacking detail.

Colonoscopy

• Procedure mentioned with no further elaboration.

Candida - Thrush

• Etiology:
    - Fungal infection affecting the mucus membranes in the GI tract (vagina, mouth)
    - Risk factors: Antibiotic use, long-term steroid use, compromised patients (chemo, radiation, leukemia)

• Medical Management: Nystatin swish is often used.

• Nursing Interventions: Education and treatment monitoring.

Gastroesophageal Reflux Disease (GERD)

• Etiology:
    - Characterized by the backup of stomach acid into the esophagus
    - Caused by the inability of the lower esophageal sphincter to close fully.

• Clinical Manifestations:
    - Dyspepsia (burning sensation in the chest)
    - Pain occurring 20 minutes to 2 hours post-meal.
    - Regurgitation of food

• Aggravating Foods:
    - Chocolate
    - Caffeine
    - Spearmint, peppermint
    - Fatty foods, cola, milk, citrus juices.

• Risk Factors:
    - Obesity
    - Pregnancy
    - Smoking
    - Alcohol use.

Medical Management

• Dietary modifications and avoidance of aggravating habits.

• Medications include:
    - Antacids
    - H2 antagonists (examples: Pepcid, Tagamet, Zantac)
    - Proton pump inhibitors (examples: Protonix, Prilosec, Nexium)

• Potential surgical correction to strengthen the lower esophageal sphincter.

• Barrett's Esophagus:
    - Cellular changes due to acid exposure, increasing risk of carcinoma.

Peptic Ulcers

• Definition: Ulcerations from the lower esophagus to the duodenum.

• Etiology:
    - Infections by H. pylori
    - Tobacco use
    - High intake of salicylates
    - Increased acid secretion
    - Psychological stress.

Clinical Manifestations

• Symptoms include:
    - Dull burning or gnawing pain in the midline epigastric region
    - Distention
    - Nausea
    - Gastrointestinal bleeding
    - Possible perforation.

Diagnosis

• Assessing client symptoms; tools include EGD and tests for the presence of H. pylori.

• Treatment includes:
    - Antibiotics, Antacids (Calcium), H2 blockers (Famotidine, Ranitidine), Proton pump inhibitors (Omeprazole, Pantoprazole).
    - Cytoprotective agents like Sucralfate.

Surgical Treatments

• Possible removal of part to total gastrectomy.

• Vagotomy to reduce acid production by cutting the vagus nerve.

Nursing Interventions and Patient Teaching for Peptic Ulcers

• Emphasize the effect of stress on ulcer formation.

• Educate on dietary modifications, including:
    - Eating small, frequent meals

Dumping Syndrome

• Etiology: Occurs when gastric size is altered (e.g., following Billroth procedures);
    - Commonly happens after gastric resection surgeries.

• Clinical Manifestations: Rapid emptying of gastric contents into the intestine causing:
    - Diaphoresis
    - Nausea/vomiting
    - Pain and diarrhea.

• Nursing Interventions:
    - Educate to consume small meals, avoiding liquids during meals, and reclining after meals.

Altered Elimination

• Nausea and vomiting can occur due to:
    - Dietary issues
    - Neurological factors
    - Muscular disorders
    - Hormonal conditions

• Diarrhea can arise from intestinal infections (often self-limiting).

• Nursing Note: Always culture stool before administering antidiarrheal medications.

Antidiarrheal Medications

• Common medications:
    - Adsorbents:
      - Bismuth Subsalicylate (Pepto-Bismol)
      - Attapulgite (Kaopectate)
    - Diphenoxylate (Lomotil)
    - Loperamide (Imodium)
    - Opiates: Belladonna.

Laxatives

• Various types include:
    - Saline Laxatives (Magnesium Citrate)
    - Stimulant Laxatives (Sennakot)
    - Bulk-forming (Metamucil)
    - Fecal softeners (Colace)
    - Lubricants (Mineral Oil)
    - Hyperosmotic (GoLytely).

Irritable Bowel Syndrome (IBS)

• Etiology: A combination of chronic and recurrent gastrointestinal symptoms.

• Clinical Manifestations: Include:
    - Intestinal pain
    - Abdominal pain while passing stool
    - Gas, diarrhea, constipation, abdominal distention.
    - Psychological links suspected (e.g., anxiety).

Management and Nursing Interventions for IBS

• Recommendations include:
    - Increasing fiber intake
    - Low-residue diets
    - Anti-anxiety medications

• Incorporating relaxation techniques.

Crohn’s Disease

• Etiology: Inflammation occurring in segments of the GI tract from the mouth to anus, often considered autoimmune.

• Age of onset: Most commonly between 15-30 years.

• Symptoms:
    - Ulcers, inflammation, scarring leading to a cobblestone appearance.
    - Episodes of remission and exacerbation.
    - Major issue: Malabsorption when the small intestine is affected.

Clinical Manifestations

• Symptoms include diarrhea, abdominal pain, weight loss, fever, malnutrition, dehydration, and electrolyte imbalances.

• Stool may contain fat (steatorrhea).

• Hallmark Issue: Formation of fistulas (within the bowel and to urinary or vaginal/anal areas).

Diagnosis

• Barium enema may reveal inflammation and possible cobblestone appearance.

• Medical Management: Use of:
    - Anti-inflammatories
    - Corticosteroids
    - Multivitamins and B12 injections
    - Immunosuppressive drugs.

Nursing Interventions

• Dietary changes promoting a high-protein diet and skin protection are crucial for patient care.

Ulcerative Colitis

• Etiology: Inflammation concentrated in mucosal layers of the colon and rectum. Effects are worsened by psychosomatic factors.

• Clinical Manifestations:
    - 15-20 bowel movements per day often with mucus and blood.
    - Potential development of polyps and scarring which may hinder bowel absorption, causing malnutrition.
    - Abdominal pain and cramping.

Treatment and Management

• Medical management includes:
    - Anti-inflammatories, antibiotics, corticosteroids, antidiarrheals.
    - Recommended diet: High protein, low residue, exclude dairy and spicy foods.

• Surgical treatments may involve removal of diseased bowel segments and formation of an ileostomy.

Comparison of Crohn's Disease and Ulcerative Colitis

Appendicitis

• Etiology: Inflammation of the vermiform appendix.

• Clinical Manifestations: Acute pain in the right lower quadrant (RLQ), nausea, low-grade fever.

• Diagnosis: Elevated WBC count and CT scanning.

• Treatment: Emergency surgical removal of the appendix to prevent perforation and peritonitis.

Peritonitis

• Etiology: Inflammation of the abdominal peritoneum due to perforation (e.g., ruptured appendix).

• Clinical Manifestations: Severe abdominal pain progressing to a sense of relief then increased pain; symptoms of sepsis.

• Diagnosis: Use of X-rays to identify free air from perforation, CBC to evaluate infection extent.

• Management: Aggressive antibiotics, surgical correction for perforations, IV fluids, and maintenance of hemodynamics.

Findings and Nursing Responsibilities in Peritonitis

• Monitoring vital signs and hemodynamic stability are crucial, along with observing for signs of shock, dehydration, and infection.

Intestinal Obstruction

• Etiology: Results when gastrointestinal contents cannot pass due to mechanical (volvulus or adhesions) or non-mechanical obstructions.

• Symptoms: Cramping abdominal pain early; bowel sounds may decrease; diagnosis via X-ray can reveal gas and fluid presence.

• Treatment: Removal of obstruction and restoration of fluid and electrolyte balance.

Diverticulosis and Diverticulitis

• Etiology of Diverticulosis: Formation of pouch-like herniations in the colon due to low-residue diet; more common over age 50.

• Clinical Manifestations: Varying levels of left lower quadrant pain, fever, and blood in stool.

• Diagnosis: CT scan and colonoscopy.

• Management of Diverticulitis: Treatment includes a low-residue diet and antibiotics.

Hernias

• Types of Hernias:
    - Umbilical (congenital)
    - Inguinal (weakened abdominal wall)
    - Ventral (due to prior incision)

• Dietary Considerations: Low-fiber diets recommended for those at risk of obstruction due to narrowed intestinal tract.

Cholecystitis and Cholelithiasis

• Etiology: Inflammation and obstruction of the gallbladder, commonly due to gallstones.

• Clinical Manifestations: Includes acute nausea, vomiting, and pain in the right upper quadrant.

• Treatment: May require surgical intervention.

Pancreatitis

• Etiology: Acute or chronic inflammation due to trauma or exposure to toxins (notably alcohol).

• Symptoms: Severe abdominal pain, often radiating to the back; low-grade fever, jaundice.

• Management: Requires hospitalization, with a focus on pain management and nutritional support.

Hepatitis

• **Types of Viral Hepatitis:
    - *Hepatitis A*: Oral-fecal route; focused prevention through hygiene and vaccination.
    - *Hepatitis B*: Contact with infected bodily fluids; vaccination is critical.
    - *Hepatitis C*: Primarily spread through blood; prevention emphasizes sterile technique.

• Common Symptoms Across Types: GI distress, jaundice, anorexia.

Cirrhosis

• Etiology: A chronic, progressive liver disease characterized by loss of liver architecture and function.

• Clinical Manifestations: Include jaundice, ascites, esophageal varices, and mental status changes due to encephalopathy.

• Management: Focuses on preventing further damage and managing symptoms; monitoring and pharmacotherapy strategies are important.

Medical Management and Nursing Interventions for Cirrhosis

• Emphasize symptom management, nutritional interventions, and monitoring for complications such as variceal bleeding and hepatic encephalopathy.

Notes on Specific Techniques

• Surgical Approaches:
    - Laparoscopic cholestectomy is less invasive compared to open procedures, resulting in quicker recovery.

• Monitoring Post-Operative Patients: Especially those post Whipple procedures after pancreatic surgery; focus on nutritional support and managing complications.

Nursing Considerations

• Consistent assessment of abdominal symptoms, adherence to dietary guidelines, educator roles in promoting healthy lifestyle choices, and reassurance and emotional support for patients in treatment.