NLE Gastrointestinal Nursing — Lower GI & Bowel DisordersDetailed Explanation

Inflammatory Bowel Disease (IBD) is a chronic, relapsing condition characterized by abnormal immune-mediated inflammation of the gastrointestinal tract. There are two main forms: Crohn's Disease (CD) and Ulcerative Colitis (UC). Understanding their differences is essential because the NLE frequently asks you to distinguish them based on clinical findings, complications, and management.

Crohn's Disease can affect any part of the GI tract from mouth to anus, but most commonly involves the terminal ileum. Its hallmark is 'skip lesions' — patchy, discontinuous areas of inflammation separated by normal-looking bowel. The inflammation is transmural, meaning it goes through ALL layers of the bowel wall, which leads to fistulas (abnormal tunnels between loops of bowel or to other organs) and strictures. Because it affects the terminal ileum, malabsorption of fat, Vitamin B12, and folate is a major concern. Surgery is NOT curative — CD recurs even after bowel resection.

Ulcerative Colitis is confined ONLY to the colon and rectum. It ALWAYS starts at the rectum and spreads continuously upward (no skip lesions). The inflammation is limited to the mucosa and submucosa (superficial layers), so fistulas and strictures are rare. The classic presentation is frequent, bloody, mucoid diarrhea — sometimes 10 to 20 times per day. Unlike Crohn's, UC can be CURED by total colectomy (surgical removal of the entire colon). However, the risk of colorectal cancer is HIGHER in UC, especially after 8–10 years of disease. The most dangerous complication of UC is toxic megacolon — massive dilation of the colon with systemic toxicity, which is a surgical emergency.

Both conditions cause diarrhea, abdominal pain, weight loss, fatigue, fever, and anemia. They also have extraintestinal manifestations (arthritis, uveitis, skin lesions).

Key Nursing Management: Monitor fluid and electrolyte balance (chronic diarrhea causes hypokalemia and dehydration). During flares, provide a low-residue, high-protein, high-calorie diet; severe cases require Total Parenteral Nutrition (TPN). Avoid high-fiber foods, dairy (if lactose-intolerant), caffeine, and cold or spicy foods that stimulate bowel activity. Monitor for toxic megacolon in UC: abdominal distension, fever, tachycardia, and absent bowel sounds.

Pharmacology: Aminosalicylates (sulfasalazine, mesalamine) are first-line for mild-to-moderate UC. Sulfasalazine requires folic acid supplementation (it impairs folate absorption), should be taken with plenty of food and water, and causes orange-yellow discoloration of urine (warn the patient — this is NORMAL). Patients with sulfa allergy should use mesalamine instead. Corticosteroids (prednisone, IV hydrocortisone) manage acute flares but must NEVER be stopped abruptly — taper always. Immunomodulators (azathioprine, 6-mercaptopurine, methotrexate) are steroid-sparing; monitor CBC and liver function (bone marrow suppression risk). Biologics (infliximab, adalimumab — anti-TNF agents) are used for moderate-to-severe disease; ALWAYS screen for latent TB and Hepatitis B before initiating.

Irritable Bowel Syndrome is a FUNCTIONAL gastrointestinal disorder — meaning there is NO structural damage, NO inflammation, and NO visible lesion on endoscopy or imaging. The problem is in how the gut FUNCTIONS: altered motility and visceral hypersensitivity cause the bowel to be overreactive to normal stimuli like stress, food, and hormonal changes.

IBS is extremely common and affects a significant portion of the Philippine adult population, often mismanaged or confused with IBD in clinical settings. The NLE uses IBS to test your ability to distinguish functional from organic disease.

Clinical Presentation: Chronic abdominal pain or discomfort (often crampy) that is RELIEVED by defecation. Patients have altered bowel habits — either diarrhea-predominant (IBS-D), constipation-predominant (IBS-C), or mixed (IBS-M). Bloating and abdominal distension are common.

RED FLAGS that RULE OUT IBS (point to organic disease): Blood in stool, unexplained weight loss, nocturnal symptoms (waking the patient from sleep), fever, elevated inflammatory markers (CRP, ESR), or onset after age 50. If ANY of these are present, IBS is NOT the diagnosis.

Diagnosis: IBS is diagnosed using the Rome IV criteria — based on symptom patterns, NOT on any specific test. Investigations are done to EXCLUDE other conditions (colonoscopy, stool studies, CBC, thyroid function).

Management: There is no single cure. Management is multifactorial: (1) Dietary modification — low-FODMAP diet (reducing fermentable carbohydrates like lactose, fructose, certain fibers); identify and avoid personal trigger foods; regular meal times; adequate fiber for IBS-C. (2) Lifestyle — stress management techniques (IBS is strongly linked to psychological stress and anxiety), regular exercise. (3) Medications — antispasmodics (dicyclomine, hyoscine) for cramping; loperamide for IBS-D; fiber supplements or lubiprostone for IBS-C. (4) Psychological support — cognitive-behavioral therapy (CBT) has strong evidence.

Key Nursing Role: Patient education is critical — many Filipino patients fear they have cancer or IBD. Reassure that IBS is real but NOT dangerous, explain the mind-gut connection, and empower the patient with self-management strategies.

Diverticular disease encompasses two related conditions involving the sigmoid colon (most common site in Filipinos and Western populations): Diverticulosis and Diverticulitis.

Diverticulosis refers to the presence of diverticula — small, pouch-like outpouchings that herniate through weak points in the colon wall. They form due to CHRONIC LOW-FIBER DIET and constipation, which raise intraluminal pressure. Most patients (about 80%) are ASYMPTOMATIC. Some may have mild cramping. Management is PREVENTIVE: high-fiber diet (25–35 g/day), adequate fluid intake, and physical activity to reduce constipation and lower intraluminal pressure.

Diverticulitis occurs when one or more diverticula become inflamed and infected (bacteria become trapped in the pouch). It is the complication that causes acute illness.

Classic Presentation: LEFT LOWER QUADRANT (LLQ) pain (because the sigmoid colon is on the left side — think 'left-sided appendicitis'), fever, leukocytosis, nausea, vomiting, and altered bowel habits (constipation or diarrhea).

Diagnostics: CT SCAN of the abdomen and pelvis is the PREFERRED imaging during acute diverticulitis. AVOID colonoscopy and barium enema during the ACUTE phase — risk of perforation is HIGH. These studies should be done 4–6 weeks AFTER the acute episode has resolved.

Management (Acute Phase): NPO or clear liquid diet, IV fluids for hydration, IV antibiotics covering gram-negative organisms and anaerobes (metronidazole + ciprofloxacin is a classic combination). Advance diet as tolerated once fever resolves.

Management (After Recovery / Prevention): HIGH-FIBER diet and adequate fluid intake to prevent recurrence. During an ACUTE ATTACK, the diet is LOW-FIBER to rest the bowel — this distinction is a CLASSIC NLE trap.

Complications: Perforation (→ peritonitis), abscess formation, obstruction, fistula (most commonly colovesical — between colon and bladder, causing pneumaturia — air in the urine), and bleeding.

Appendicitis is the MOST COMMON cause of acute abdomen requiring emergency surgery. It occurs when the appendiceal lumen becomes obstructed — most often by a fecalith (hardened stool), lymphoid hyperplasia (common in younger patients), or a foreign body — leading to inflammation, bacterial overgrowth, ischemia, and if untreated, PERFORATION and PERITONITIS. This is one of the HIGHEST-STAKES topics in the NLE, especially the absolute safety rules.

Clinical Presentation — Classic Progression:

1. Periumbilical, poorly localized pain (early, visceral)
2. Anorexia, nausea, vomiting
3. Pain MIGRATES to the RIGHT LOWER QUADRANT (RLQ) and localizes at MCBURNEY'S POINT (located one-third of the distance from the right anterior superior iliac spine to the umbilicus)
4. Low-grade fever (38–38.5°C)
5. Mild leukocytosis (WBC 10,000–18,000/mm³)

Physical Examination Signs:

• Rebound tenderness (Blumberg's sign): pain WORSENS when pressure is RELEASED — indicates peritoneal irritation
• Rovsing's sign: pressing the LEFT lower quadrant causes pain in the RIGHT lower quadrant
• Psoas sign: extending the right hip causes RLQ pain (retrocecal appendix)
• Obturator sign: internal rotation of the right flexed hip causes RLQ pain (pelvic appendix)
• Guarding: involuntary muscle rigidity

DANGER SIGN: If the patient reports SUDDEN RELIEF of pain, this may indicate RUPTURE of the appendix. The pain and rigidity then RETURN with signs of peritonitis (diffuse rigid abdomen, high fever, absent bowel sounds). This is a FREQUENTLY TESTED NLE concept.

CRITICAL SAFETY RULES (HIGHEST-YIELD NLE CONTENT):

1. NEVER APPLY HEAT TO THE ABDOMEN — heat increases blood flow and circulation to the area, promoting inflammatory processes that increase the risk of rupture. Use COLD packs for comfort instead.
2. NEVER GIVE LAXATIVES OR ENEMAS — they increase peristalsis (gut motility), which dramatically raises the risk of perforation and spreading infection.
3. NEVER GIVE ANALGESICS THAT MASK SYMPTOMS before proper surgical evaluation (per facility policy) — though this is being re-evaluated in modern practice, the NLE traditionally tests this principle.
4. Position the patient in semi-Fowler's or right-side-lying with knees flexed — reduces pain by relaxing abdominal muscles.

Treatment: The definitive treatment is APPENDECTOMY (emergency surgery). Pre-op: NPO, IV access, IV fluids, antibiotics. Post-rupture: broad-spectrum IV antibiotics, NPO, NGT for decompression, monitor for peritonitis and sepsis.

Intestinal obstruction occurs when the normal passage of intestinal contents is blocked. It is classified by CAUSE (mechanical vs. functional) and by LOCATION (small bowel vs. large bowel) — each combination produces a distinct clinical picture.

Types:
Mechanical Obstruction — a physical blockage inside the lumen or from outside: adhesions (most common cause overall — post-surgical scar tissue), hernias (incarcerated or strangulated), tumors, volvulus (twisting of the bowel), and intussusception (telescoping of one segment of bowel into another — classic in infants/children).
Functional/Paralytic Ileus — the bowel stops moving without a physical blockage. Causes include post-operative state (most common), peritonitis, electrolyte imbalances (especially HYPOKALEMIA), and medications (opioids, anticholinergics).

Clinical Manifestations by LOCATION:

Small Bowel Obstruction (SBO):

• EARLY, PROFUSE VOMITING (bilious or feculent in complete obstruction) — key differentiating feature
• CRAMPY, COLICKY ABDOMINAL PAIN
• HYPERACTIVE (tinkling, high-pitched) bowel sounds EARLY, then ABSENT as bowel becomes dilated
• MINIMAL ABDOMINAL DISTENSION (more proximal = less distension)
• RAPID DEHYDRATION due to massive fluid loss into the bowel lumen
• METABOLIC ALKALOSIS — vomiting causes loss of hydrochloric acid (HCl) from the stomach

Large Bowel Obstruction (LBO):

• GRADUAL ONSET with MARKED ABDOMINAL DISTENSION (hallmark)
• OBSTIPATION — complete failure to pass stool OR gas (no flatus)
• Less vomiting initially, or feculent vomiting late
• METABOLIC ACIDOSIS — loss of bicarbonate-rich fluid from the intestines

Priority Nursing Interventions:

1. NPO — nothing by mouth to rest the bowel
2. Nasogastric Tube (NGT) decompression — insert NGT and connect to LOW INTERMITTENT SUCTION to remove accumulated gas and secretions
3. IV fluids and ELECTROLYTE REPLACEMENT — correct dehydration, alkalosis, or acidosis
4. Strict Intake and Output (I&O) monitoring — assess fluid balance
5. Monitor for STRANGULATION — when blood supply to the obstructed bowel is compromised: fever, tachycardia, worsening pain, signs of peritoneal irritation, and sepsis = SURGICAL EMERGENCY requiring immediate intervention.
6. Monitor bowel sounds every 4 hours — return of bowel sounds indicates resolution.

Treatment: Conservative management with NPO and NGT decompression for functional ileus or partial obstruction; surgical intervention for complete mechanical obstruction or strangulation.

An ostomy is a surgically created opening on the abdominal wall that diverts the fecal stream when the normal pathway cannot be used — due to cancer, IBD, trauma, or obstruction. A stoma (the opening) is fashioned from a loop of bowel brought through the abdominal wall. Types include COLOSTOMY (from the colon) and ILEOSTOMY (from the ileum).

Stoma Assessment — NORMAL vs. ABNORMAL:
Normal stoma characteristics: PINK-RED color (indicating good blood supply), moist, slightly raised above skin level, and will bleed slightly with contact (this is NORMAL — the stoma has many small vessels). The most CRITICAL assessment finding is stoma COLOR:

• PINK-RED = Normal, well-vascularized
• PALE = Possible anemia or poor blood flow
• DARK, DUSKY, PURPLE, or BLACK = ISCHEMIA — REPORT IMMEDIATELY to the physician. A black stoma is a nursing emergency.

Ileostomy:

• Output is LIQUID and CONTINUOUS — the terminal ileum does not absorb water efficiently
• Contains DIGESTIVE ENZYMES (proteases, lipases) — extremely irritating to the skin
• HIGH RISK for: (1) PERIOSTOMAL SKIN BREAKDOWN — enzymes erode the skin if the appliance leaks; meticulous skin protection is essential (2) DEHYDRATION AND ELECTROLYTE IMBALANCES — especially sodium and potassium loss; ileostomy patients need EXTRA FLUID and SALT daily
• Certain foods can cause BLOCKAGE: high-fiber foods like corn, celery, nuts, coconut, and mushrooms — chewing thoroughly is crucial for ileostomy patients

Colostomy:

• Output becomes PROGRESSIVELY MORE FORMED depending on location: ascending colostomy = liquid; transverse = semi-formed; descending/sigmoid colostomy = formed, most like normal stool
• Sigmoid colostomy can sometimes be REGULATED by irrigation (scheduled colostomy irrigation) — some patients use this to establish a predictable routine and go pouch-free between irrigations

Appliance Management:

• Empty the pouch when it is ONE-THIRD TO ONE-HALF FULL — this prevents leakage and reduces odor
• The opening of the appliance should be only SLIGHTLY LARGER than the stoma (approximately 2–3 mm) — too large → skin exposure to stool/enzymes; too small → constricts the stoma
• Change the entire appliance every 3–7 days (depending on type) or whenever there is leakage
• Clean the peristomal skin gently with warm water and mild soap; pat dry; apply skin barrier paste or powder as needed

Patient Teaching Topics:

1. Stoma color assessment — when to report abnormal findings
2. Foods to avoid/introduce gradually (gas-forming: beans, cabbage, carbonated drinks; odor-producing: eggs, fish, garlic, onion)
3. Adequate hydration and salt intake (ileostomy patients especially)
4. Chew food thoroughly (ileostomy blockage prevention)
5. Body image support — ostomy patients in the Philippines often face significant psychosocial challenges; address cultural attitudes, refer to support groups (United Ostomy Associations)
6. Sexual concerns and return to normal activities

NANDA Nursing Diagnoses: Disturbed Body Image; Risk for Impaired Skin Integrity (peristomal); Deficient Knowledge; Risk for Deficient Fluid Volume (ileostomy).

Hemorrhoids are dilated, engorged veins in the anal and rectal area — essentially varicose veins of the rectum. They develop due to increased venous pressure from chronic straining at stool (constipation), prolonged sitting, pregnancy, obesity, and low-fiber diet. They are classified as INTERNAL or EXTERNAL based on their location relative to the dentate line (the junction between anal canal and rectum).

Internal Hemorrhoids: Located ABOVE the dentate line (inside the rectum, covered by rectal mucosa). Key characteristic: PAINLESS BRIGHT-RED RECTAL BLEEDING, typically noted on toilet paper or dripping into the toilet bowl after defecation. Because the rectal mucosa has no pain receptors, internal hemorrhoids are typically PAINLESS unless they prolapse and become strangulated.

External Hemorrhoids: Located BELOW the dentate line (outside the anal opening, covered by skin). Key characteristic: PAINFUL, PALPABLE, and may be VISIBLE. Pain is especially severe when an external hemorrhoid becomes THROMBOSED (clot forms inside).

Management:
Conservative (first-line):

1. HIGH-FIBER DIET and INCREASED FLUID INTAKE — softens stool to reduce straining
2. STOOL SOFTENERS (docusate sodium) — reduce straining at defecation
3. SITZ BATHS — sitting in warm water for 10–15 minutes, 3–4 times per day — relieves pain, reduces swelling, promotes hygiene
4. TOPICAL AGENTS — witch hazel (astringent), hydrocortisone cream (anti-inflammatory), local anesthetic ointments
5. Avoid prolonged sitting on the toilet

Procedural/Surgical (for refractory cases):

• Rubber-band ligation (most common office procedure for internal hemorrhoids)
• Sclerotherapy
• Hemorrhoidectomy (surgical excision) — for severe cases

Post-Hemorrhoidectomy Nursing Care:

• Sitz baths to promote comfort and wound healing
• Stool softeners to make the first bowel movement less painful
• Warn the patient: the FIRST BOWEL MOVEMENT POST-SURGERY WILL BE PAINFUL — this is expected and should NOT be delayed
• Monitor for bleeding, urinary retention (common post-op complication due to perianal pain causing reflex urethral spasm)
• Pain management — analgesia before bowel movements

Constipation and diarrhea are extremely common GI complaints in Filipino patients and serve as foundational knowledge for understanding more complex bowel disorders. They are also directly tested in the NLE.

CONSTIPATION is defined as infrequent, hard, difficult-to-pass stools (fewer than 3 bowel movements per week, with straining or a sense of incomplete evacuation). It is NOT simply defined by frequency alone — the quality and difficulty of passing stool matters.
Causes: Low-fiber diet (most common), inadequate fluid intake, physical inactivity, opioid medications (very common post-operatively), anticholinergic drugs, ignoring the urge to defecate, hypothyroidism, pregnancy, and immobility.
Management Hierarchy: (1) Non-pharmacological FIRST: increase dietary fiber (25–35 g/day) and fluid intake (8–10 glasses/day), increase physical activity, establish a regular toileting routine and respond to the urge promptly. (2) Pharmacological: start with bulk-forming agents (psyllium/Metamucil — must be taken with plenty of water); then osmotic laxatives (lactulose, polyethylene glycol); stimulant laxatives (bisacodyl, senna) short-term only. TEACH against chronic stimulant-laxative dependence — can cause 'lazy bowel' (cathartic colon).

DIARRHEA is defined as frequent, loose, watery stools (more than 3 per day with increased water content). Acute diarrhea (< 2 weeks) is most often infectious; chronic diarrhea (> 4 weeks) suggests IBS, IBD, malabsorption, or other organic cause.
Causes: Infectious (viral — rotavirus, norovirus; bacterial — Salmonella, E. coli, C. difficile; parasitic — Entamoeba, Giardia — common in Philippine rural settings), IBD, IBS, food intolerance (lactose, gluten), medications (antibiotics), and malabsorption.

Complications of Diarrhea:

• DEHYDRATION (greatest risk in infants, elderly, and malnourished patients)
• HYPOKALEMIA (K+ lost in liquid stool)
• METABOLIC ACIDOSIS (loss of bicarbonate-rich intestinal fluid)
• Perianal skin breakdown from frequent liquid stools

Priority Management of Diarrhea:

1. FLUID AND ELECTROLYTE REPLACEMENT — Oral Rehydration Solution (ORS) is the FIRST-LINE treatment in mild-to-moderate dehydration (WHO-recommended: 75 mEq/L sodium, glucose, and potassium). This is highly relevant in the Philippine context where diarrheal diseases (LBM) are a leading cause of morbidity and mortality in children.
2. IV fluids for severe dehydration.
3. Treat the underlying cause (antibiotics if indicated, antifungals, antiparasitics).
4. AVOID antimotility agents (loperamide/Imodium) in BLOODY or FEBRILE diarrhea — if caused by invasive organisms (Salmonella, Shigella, E. coli O157:H7) or if there is a risk of toxic megacolon (UC) — loperamide can precipitate toxic megacolon by stopping elimination of the pathogen and allowing toxin accumulation.
5. Perianal skin care — barrier creams, gentle cleansing, moisture-wicking pads.
6. NANDA: Diarrhea; Deficient Fluid Volume; Risk for Electrolyte Imbalance; Impaired Skin Integrity.