Gastrointestinal and Renal Disorders Flashcards

Ulcerative Colitis (UC): Manifestations, Complications, and Management

• Definition and Pathophysiology:

  • Ulcerative colitis (UC) is a chronic inflammatory bowel disease (IBD) that is localized strictly to the colon and the rectum.

  • The inflammatory process originates in the rectum and spreads in a continuous, uninterrupted fashion through the colon.

  • The inflammation causes the intestinal lining to become hyperemic and ulcerated.

• Clinical Manifestations:

  • Bloody Diarrhea: Patients experience frequent episodes of diarrhea containing a mixture of blood and mucus. This is a primary distinguishing characteristic because the inflamed mucosa bleeds easily, resulting in bright red blood in the stool.

  • Abdominal Pain: Pain is typically localized in the Left Lower Quadrant (LLQ), as the descending and sigmoid colon are most frequently involved.

  • Systemic Symptoms: Patients often present with urgency, fatigue, dehydration, and significant weight loss.

• Serious Complications:

  • Severe gastrointestinal (GI) bleeding.

  • Dehydration and significant electrolyte imbalances.

  • Intestinal obstruction.

  • Toxic megacolon.

  • Colorectal Cancer: Persistent long-term inflammation significantly increases the risk of malignant cellular changes in the colon.

• Nutritional Interventions:

  • Exacerbation Diet: A high-protein, low-fiber diet is required. Protein supports tissue healing, while low-fiber foods minimize intestinal stimulation.

  • Dietary Triggers: Patients must avoid spicy foods, caffeine, alcohol, and dairy products.

  • Acute Flare-up Management: For severe cases, patients are placed on bowel rest (NPO status) and may require Total Parenteral Nutrition (TPN).

• Pharmacological Management:

  • $5$-Aminosalicylates ($5-ASA$): Sulfasalazine is the first-line medication for mild to moderate disease. It reduces inflammation in the intestinal lining and is used to maintain remission.

  • Corticosteroids: Prednisone is utilized for acute flare-ups to rapidly suppress inflammation and bleeding. However, long-term use carries risks of osteoporosis, infection, hyperglycemia, peptic ulcer disease, and adrenal suppression.

• Surgical Intervention:

  • Colectomy: A surgical procedure involving the removal of the colon. This is indicated when medications fail, complications arise, or cancer is detected.

  • Curative Potential: Unlike Crohn’s disease, a colectomy is considered curative for UC because the disease is limited to the colon. This is a critical point for NCLEX examination preparation.

Crohn’s Disease: Pathophysiology and Clinical Distinctions

• Definition and Scope:

  • Crohn’s disease is a chronic inflammatory condition that can affect any segment of the GI tract, ranging from the mouth to the anus.

  • The most common site of involvement is the terminal ileum.

• Distinguishing Clinical Features:

  • Skip Lesions: This is a defining hallmark where areas of diseased bowel are separated by healthy sections, creating a patchy, non-continuous pattern of inflammation.

  • Full Thickness Involvement: The disease affects the entire thickness of the bowel wall, which leads to the frequent development of fistulas.

  • Fistulas: An abnormal passageway connecting the intestine to other organs or the skin surface. These are significantly more common in Crohn’s than in UC.

• Clinical Presentation:

  • Chronic diarrhea (classically without visible blood).

  • Abdominal pain in the Right Lower Quadrant (RLQ).

  • Fatigue, weight loss, and malnutrition.

• Nutritional Concerns:

  • Malabsorption: This is a major risk factor due to small intestine involvement.

  • Diet: Patients should consume a high-calorie, high-protein diet.

  • Vitamin Supplementation: Specifically Vitamin $B12$ is necessary because it is absorbed in the terminal ileum.

  • Severe Exacerbations: May necessitate the use of TPN.

• Treatment and Surgery:

  • Medications: Treatment includes corticosteroids and anti-inflammatory agents to reduce inflammation and maintain remission.

  • Surgery: Indicated for bowel obstructions, fistulas, abscesses, or strictures.

  • Important Caveat: Surgery is not curative for Crohn’s disease, as inflammation can recur in previously healthy segments of the GI tract.

Appendicitis and Peritonitis: Emergency Nursing Considerations

• Appendicitis Assessment:

  • Pain typically begins as vague periumbilical pain and then migrates to the Right Lower Quadrant (RLQ).

  • McBurney’s Point: Classic tenderness at this specific abdominal location.

  • Symptoms include nausea, vomiting, anorexia, fever, and rebound tenderness.

• Risk of Rupture:

  • Rupture is the greatest danger, as it allows bacteria to leak into the abdominal cavity, leading to peritonitis.

  • Signs of rupture: Sudden worsening of pain followed by systemic infection and shock.

• Management and Contraindications:

  • Definitive Treatment: Appendectomy.

  • Pre-operative: NPO status and IV fluid administration.

  • Post-operative: Monitoring vital signs, pain, bowel function, and infection signs. Early ambulation is encouraged.

  • Avoidance: Heating pads and laxatives are strictly contraindicated because they increase the risk of appendix rupture.

• Peritonitis Presentation:

  • Severe abdominal pain and a rigid, board-like abdomen.

  • Abdominal distention, fever, rebound tenderness, and diminished bowel sounds.

  • Patients often assume a position where they lie still with knees flexed to mitigate pain.

• Peritonitis Interventions:

  • This is a medical emergency due to the rapid onset of sepsis and shock.

  • Priority care: IV fluids, broad-spectrum antibiotics, Nasogastric (NG) tube insertion, NPO status, and surgical preparation.

Diverticulosis and Diverticulitis: Chronic vs. Acute Management

• Risk Factors: Aging, obesity, inactivity, chronic constipation, and low-fiber diets. These factors increase intra-colonic pressure, contributing to the formation of diverticula.

• Diverticulosis (Chronic/Maintenance):

  • Asymptomatic or non-inflamed pouches.

  • Dietary Goal: High-fiber diet and increased fluid intake to reduce constipation and colon pressure.

• Diverticulitis (Acute Inflammation):

  • Inflamed diverticula requiring acute care.

  • Dietary Goal: Low-fiber or clear-liquid diet to provide bowel rest.

  • Complications: Perforation, abscess formation, bleeding, obstruction, and peritonitis.

• Pharmacology and Education:

  • Antibiotics: Common combinations include Metronidazole ($Flagyl$) with either Ciprofloxacin ($Cipro$) or Trimethoprim-sulfamethoxazole ($Bactrim$).

  • Patient Teaching: Once recovered, patients must increase fiber, maintain hydration, and exercise. They must report fever or worsening pain immediately.

Pyelonephritis: Signs, Symptoms, and Kidney Health

• Clinical Indicators:

  • Fever, chills, and fatigue.

  • Flank pain and Costovertebral Angle (CVA) tenderness.

  • Urinary symptoms: Dysuria, frequency, and urgency.

  • Systemic distress: Nausea and vomiting.

• Diagnostic Findings:

  • Urinalysis: Presence of bacteria, white blood cells (WBCs), and occasionally blood.

  • Urine Cultures: Used to identify the causative organism for targeted antibiotic therapy.

• Nursing Interventions and Education:

  • Priority: Administration of IV antibiotics in severe cases and maintaining hydration.

  • Prevention: Increase fluid intake, avoid delaying urination, wipe from front to back, and complete the entire course of antibiotics.

Nephrotic Syndrome: Pathophysiology of Massive Proteinuria

• Defining Hallmark:

  • Massive Proteinuria: Damaged glomeruli allow large amounts of protein to leak into the urine.

• Symptom Cascade:

  • Hypoalbuminemia: Lowered serum albumin levels due to urinary loss.

  • Generalized Edema: Reduced oncotic pressure causes fluid to shift from the vasculature into the tissues.

  • Risks: Skin breakdown, infection, and fluid volume excess.

• Medical and Dietary Management:

  • Medications: Diuretics, ACE inhibitors, ARBs, steroids, immunosuppressants, and statins.

  • Diet: Low-sodium intake to reduce fluid retention and moderate protein intake.

Glomerulonephritis: Etiology and Clinical Care

• Etiology:

  • Often occurs as an immune response following a streptococcal infection (e.g., strep throat).

• Clinical Manifestations:

  • Oliguria (decreased urine output).

  • Hypertension ($HTN$).

  • Hematuria and periorbital edema.

• Diagnostics:

  • Increased Blood Urea Nitrogen ($BUN$) and Creatinine ($Cr$).

  • Decreased Glomerular Filtration Rate ($GFR$).

  • Hematuria, proteinuria, and decreased serum albumin.

• Nursing Care:

  • Implement fluid restrictions and blood pressure control using antihypertensives.

  • Monitor Intake and Output ($I\&O$), daily weights, and laboratory values.

  • Monitor the severity of edema and enforce dietary restrictions.