CC Unit 2 Nutrition

Gastroesophageal Reflux Disease Pathophysiology

Occurs when the lower esophageal sphincter (LES), which normally acts as a barrier between the stomach and the esophagus, becomes incompetent or weakened. This allows the backflow of gastric or duodenal contents into the esophagus, causing irritation and damage to the esophageal mucosa.

GERD Risk Factors

Obesity

Hiatal hernia

Smoking

Alcohol and coffee

Large meals

Lying down after eating

Tight clothing

H. pylori infection

Obstructive airway disorders (Asthma, COPD)

GERD Clinical Manifestations

Risk of aspiration

Dysphagia

Odynophagia

Atypical chest pain, sore throat, hoarseness

Regurgitation with sour taste

Pyrosis

Complications (GERD)

Esophageal strictures

Barrett’s esophagus

Esophageal strictures

Chronic exposure to stomach acid in GERD can cause inflammation and damage to the esophageal lining, leading to scarring and narrowing (stricture) of the esophagus. As the esophagus heals from repeated acid exposure, scar tissue forms, which reduces the diameter of the esophagus.

Barrett’s Esophagus

Occurs when chronic acid reflux leads to changes in the cells of the lower esophagus. The normal squamous cells are replaced by columnar epithelial cells, a process known as metaplasia. This is precancerous.

GERD Diagnostic Tests

Ambulatory pH monitoring (12-36 hours) - High

Upper Endoscopy (EGD) - Mod/High

Barium Swallow - Mod

Bernstein Test - Low/Mod

Ambulatory pH Monitoring

Gold standard for GERD diagnosis. It monitors the esophagus's pH levels continuously over 12-36 hours, providing direct evidence of acid reflux. It helps correlate symptoms with episodes of acid reflux, especially in patients with atypical GERD symptoms.

Ambulatory pH Monitoring Clinical Implications

Confirms acid reflux and quantifies the severity of the condition, allowing for appropriate treatment decisions

Upper Endoscopy (EGD- Esophagogastroduodenoscopy)

Provides direct visualization of the esophagus, stomach, and duodenum. It is particularly useful for identifying mucosal damage (e.g., esophagitis, strictures, Barrett’s esophagus), making it essential for patients with chronic or severe GERD symptoms

Endoscopy Clinical Implications

Often used in patients with alarm symptoms like dysphagia, bleeding, or weight loss. It allows for biopsies to assess the presence of Barrett’s esophagus or esophageal cancer

Barium Swallow

Uses x-rays and a barium solution to visualize the esophagus and stomach, detecting structural issues like hiatal hernias or esophageal strictures. Helps identify anatomical causes of reflux.

Barium Swallow Clinical Implications

Often performed if structural abnormalities (e.g., strictures, hernias) are suspected, and it is useful in guiding surgical decisions, also helps differentiate between hernia types

Bernstein Test

Simulates GERD symptoms by introducing acid into the esophagus, helping to confirm acid as the source of symptoms. It is less commonly used today due to more accurate tests.

Bernstein Test Clinical implications

This test is useful in distinguishing GERD from other causes of chest pain in patients with unclear or atypical presentations

GERD Medications

PPI, H2-Receptor Blockers, Antacids, Promotility Agent (Metoclopramide), 

Proton Pump Inhibitors

These are considered the most effective for reducing gastric acid production in GERD, often ending in -zole.

Side effects: Diarrhea, nausea, headache, increased risk of infections (e.g., C. difficile), long-term use associated with B12 deficiency, hypomagnesemia, and hip fractures.

Nursing Implication (Proton Pump Inhibitors)

- Administer before meals for optimal effect.

- Monitor for infections due to altered gastric flora.

- Assess bone health and encourage calcium/vitamin D supplementation in long-term users.

- Monitor drug interactions, especially with clopidogrel

H2-Receptor Blockers

Effective but less potent than PPIs.

- Examples: Famotidine, Cimetidine

- Side Effects: Headache, dizziness, constipation, diarrhea, and confusion in elderly patients.

Nursing Implications (H2-Receptor Blockers)

- Monitor mental status in older adults.

- Administer with or without meals.

- Monitor renal function in patients with kidney dysfunction.

- Educate patients about prolonged use risks.

Antacids

Used for quick relief of symptoms but not for long-term management.

- Examples: Calcium carbonate (Tums), Magnesium hydroxide, Aluminum hydroxide

- Side Effects: Constipation (aluminum), diarrhea (magnesium), electrolyte imbalances.

Nursing Implications (Antacids)

- Administer after meals for best effect.

- Monitor electrolyte levels, especially with prolonged use.

- Separate antacids from other medications by 1-2 hours to avoid drug absorption interference.

Promotility Agent (Metoclopramide)

Primarily used for patients with delayed gastric emptying.

- Example: Metoclopramide (Reglan)

- Side Effects: Drowsiness, fatigue, tardive dyskinesia, diarrhea.

Nursing Implications (Promotility Agent- Metoclopramide)

- Monitor for signs of tardive dyskinesia, especially with long-term use.

- Administer 30 minutes before meals.

- Use for short-term therapy only due to risk of dyskinesia.

Hiatal Hernia Pathophysiology

Occurs when part of the upper stomach moves upward through the enlarged opening in the diaphragm into the lower portion of the thorax

Sliding Hernia

- The gastroesophageal junction and part of the stomach slide upward through the hiatus. This is the most common type of hiatal hernia, accounting for 90-95% of cases.

Reflux Esophagitis

inflammation of the esophagus caused by the backflow of stomach acid, which is common in patients with sliding hiatal hernia.

Paraesophageal Hernia

- All or part of the stomach pushes through the diaphragm beside the esophagus. In more severe cases, other abdominal organs such as the colon or small bowel can herniate as well.

higher risk of complications like strangulation, volvulus (twisting of the intestines), and ischemia

Paraesophageal Hernia Symptoms

May be asymptomatic or cause symptoms like intermittent epigastric pain, nausea, and vomiting. Hemorrhage, obstruction, and strangulation

Hiatal Hernia Risk Factors

Obesity, chronic coughing, lifting heavy objects, or pregnancy

Congenital abnormalities or age-related weakening of the diaphragm

Stress and anxiety

Hiatal Hernia Clinical Manifestations

Occult bleeding

Dysphagia

Chest pain/Pyrosis

Gastric reflux

Intermittent gastric pain

Fullness after meals

Belching

Occult Bleeding

Hidden blood can lead to anemia or hemorrhage at worst.

Detect by doing a fecal occult blood test. May indicate slow, chronic blood loss, often seen in conditions like colorectal cancer, diverticulosis, or chronic ulcers. Colonoscopy helps too.

Occult Bleeding Clinical Implication

Immediate evaluation and intervention are necessary. Endoscopy may be required to assess the extent of the bleeding, and treatment options include medications (e.g., proton pump inhibitors) or surgery for severe cases

Monitor for signs of GI bleeding (e.g., black tarry stools or hematemesis). Perform regular hemoglobin and hematocrit assessments to detect anemia

Dysphagia

Difficulty swallowing, can result from esophageal strictures or narrowing due to chronic acid exposure, inflammation, or obstruction

Dysphagia Clinical Implications

Prompt diagnosis and management are crucial. Patients may require esophageal dilation or surgery if the dysphagia is progressive. Dietary modifications (e.g., soft diets) and medications may be necessary to reduce reflux

- Priority Intervention: Advise small, frequent meals and avoid large or bulky foods that are difficult to swallow. Position the patient in a semi-Fowler position to reduce aspiration risk

Chest Pain/Pyrosis

Pyrosis occurs due to acid reflux from the stomach into the esophagus, irritating the esophageal lining

It also mimics cardiac pain, which requires thorough evaluation to rule out cardiac causes

Pyrosis Clinical Implications

Avoid triggers (spicy or fatty foods) and elevating the head of the bed. Proton pump inhibitors or H2 receptor blockers are commonly prescribed to reduce acid production.

Gastric Reflux

Hallmark symptom of hiatal hernia, leading to inflammation, irritation, and potential long-term damage to the esophagus

Gastric Reflux Clinical Implications

Reflux control is crucial to preventing further complications. Medications, such as antacids or PPIs, and lifestyle changes, including smaller meals and avoiding reclining after eating, are standard treatments

Intermittent Gastric Pain

Pain often arises from the stretching or displacement of the stomach and is typically related to large meals or lying down soon after eating

Intermittent Gastric Pain Clinical Implication

Dietary changes (smaller meals) and positioning strategies (remaining upright after eating) can help manage this symptom. Pain should be monitored, as increasing severity may indicate complications like strangulation

Hiatal Hernia Diagnostic Tests

Esophagogastroduodenoscopy (EGD) - High

Barium Swallow - High

Fluoroscopy - Mod

X-ray Studies - Low

Fluoroscopy

A real-time X-ray that allows visualization of the movement of barium through the esophagus and stomach during a barium swallow test. It provides a dynamic view of the digestive system, capturing the motion of the hernia

Fluoroscopy Clinical Implications

Fluoroscopy aids in assessing functional issues such as how well the esophagus pushes food into the stomach. It helps evaluate esophageal motility and identify if the hernia is causing significant reflux or obstruction

X-ray Studies

Can detect large hiatal hernias, particularly those involving significant displacement of the stomach. While less sensitive than other tests, this imaging can still provide important structural information about the esophagus and stomach

X-ray Studies Clinical Implications

This test is often used when other more specific diagnostic tools are unavailable or in conjunction with other tests (e.g., barium swallow) to visualize abnormalities in the stomach or esophagus

Peptic Ulcer Disease Pathophysiology

Primarily affects the gastroduodenal mucosa, which is not equipped to withstand the digestive action of gastric acid (HCl) and pepsin. The erosion caused by these substances results from an imbalance between factors that damage the mucosal lining and the body’s defenses that protect the mucosa

Esophageal Ulcers

These occur due to the backward flow of gastric contents into the esophagus, often linked with gastroesophageal reflux disease (GERD)

Gastric Ulcers

These occur in the stomach, usually in the lesser curvature near the pylorus. Gastric ulcers are often associated with normal or decreased acid production.

Duodenal Ulcers

- These are more common than gastric ulcers and occur in the duodenum. Duodenal ulcers are associated with excessive acid secretion

Peptic Ulcer Disease Risk Factors

H. Pylori Infection

NSAIDS

Aspirin

Cigarette smoking

Family history of ulcers

History of ulcers

Steroids

H. Pylori Infection

Major cause of PUD. Disrupts the mucosal layer and increases gastric acid secretion, leading to ulcer formation. It is a common risk factor for both gastric and duodenal ulcers.

H. Pylori Clinical Implications

Eradication therapy using antibiotics and proton pump inhibitors (PPIs) is essential to eliminate the infection and reduce recurrence. Failure to treat H. pylori can lead to chronic ulcers and increase the risk of gastric cancer

H. Pylori Triple Cocktail

2 Antibiotics

1 Proton Pump Inhibitor

H. Pylori Quadruple Cocktail

2 Antibiotics

Bismuth (Pepto Bismol)

1 Proton Pump Inhibitor

NSAIDs

Inhibit prostaglandin synthesis, which is critical for maintaining the mucosal barrier in the stomach and duodenum. Long-term or frequent use of NSAIDs, such as ibuprofen or aspirin, can lead to mucosal damage and ulcer formation

NSAIDs Clinical Implication

Patients on long-term NSAID therapy should be monitored for signs of PUD, and prophylactic PPIs may be prescribed to reduce the risk of ulcers. Education on the risks associated with over-the-counter NSAID use is critical

Aspirin

Directly irritates the gastric mucosa and inhibits prostaglandin synthesis, reducing the stomach's ability to protect itself from acid. Prolonged aspirin use can cause gastric ulcers

Aspirin Clinical Implication

Assessing patients’ need for aspirin and providing alternatives when appropriate is important. Gastroprotective agents such as PPIs may be necessary to prevent ulcers in high-risk patients

Cigarette Smoking

Smoking affects gastric mucosal blood flow and increases gastric acid secretion, which can exacerbate the development of ulcers. Smoking also slows ulcer healing and increases the risk of recurrence

Blood Type O

More susceptible to developing ulcers due to their genetic makeup

Steroids

Corticosteroids, particularly in high doses or with prolonged use, can weaken the gastric mucosal defenses, increasing the risk of ulceration when combined with NSAIDs

Steroids Clinical Implications

Patients on long-term steroid therapy should be assessed for ulcer risk, especially if they are also using NSAIDs. Gastroprotective measures, such as PPI therapy, may be needed to mitigate the risk

Peptic Ulcer Disease Clinical Manifestations

Bleeding Ulcers (Gastric or Duodenal)

Perforation of Ulcer

Penetration of Ulcer

Gastric Outlet Obstruction

Pain

Silent Peptic Ulcers

Bleeding Ulcers (Gastric or Duodenal)

Hematemesis (vomiting blood) and melena (black, tarry stools).

Ulcers that erode into blood vessels can cause severe hemorrhage. If the blood loss is rapid, patients may vomit bright red blood or "coffee grounds" due to oxidized hemoglobin

Melena (Define)

Black tarry stool, occurs when the bleeding is slower and the blood passes through the GI tract, usually an upper gastrointestinal bleed. Due to peptic ulcers, gastritis, esophageal varices.

Bleeding Ulcers Clinical Implication

Prompt monitoring of vital signs, hemoglobin levels, and signs of hypovolemic shock (tachycardia, hypotension). Interventions may include endoscopic procedures to cauterize or clip the bleeding ulcer or even surgical intervention if the bleeding cannot be controlled

Perforation of Ulcer

- Sudden, severe upper abdominal pain, often referred to the right shoulder (irritation of diaphragm);

- Rigid, board-like abdomen (inflammation from peritonitis);

- Nausea or vomiting (sudden/intense irritation, systemic response, decreased intestinal motility); sepsis

- Signs of shock (hypotension, tachycardia due to fluid shifts into peritoneal cavity).

Perforation of Ulcer Clinical Implication

This is an abdominal emergency requiring immediate surgery. The nurse monitors fluid and electrolyte balance, signs of sepsis, and post-operative infection

Penetration of Ulcer

Severe, persistent epigastric or back pain (pancreas located behind the stomach) not relieved by previously effective medications. The pain is now due to inflammation and irritation of the adjacent organs, rather than just acid exposure

Penetration of Ulcer Clinical Implication

Diagnostic tools like CT scans or endoscopy may be used to visualize the depth and extent of ulcer penetration. Surgical intervention may be needed to repair the damage and prevent further complications.

Gastric Outlet Obstruction

Nausea, vomiting of undigested food, epigastric fullness, early satiety, and weight loss. The patient may have visible gastric distension. Recurrent ulceration near the pylorus can lead to scar tissue formation, narrowing the outlet between the stomach and duodenum. This condition can cause gastric stasis and discomfort.

Gastric Outlet Obstruction Clinical Implications

Decompressing the stomach with a nasogastric tube

Balloon dilation'

Antrectomy

PPI/ H2 Blockers

Fluid and electrolyte replacement

Nutritional support

Balloon Dilation

An endoscope is passed into the stomach, and a balloon is inflated within the narrowed pylorus to stretch and widen the area, allowing the passage of food. It's a minimally invasive procedure that can improve symptoms of GOO without the need for more invasive surgery.

Antrectomy

Involves the removal of the antrum, the lower part of the stomach that produces the hormone gastrin, which stimulates acid production

Pain from Duodenal Ulcer

Relieved after eating, can experience weight gain, can occur 2-3 hours after eating. Eating buffers the acid temporarily. Vomiting uncommon. Pain at night.

Pain from Gastric Ulcer

Provoked by eating, can experience weight loss, acid secretion is normal. Pain occurs 30 minutes to 1 hour after eating. Vommiting common.

Duodenal/Gastric Ulcer Pain Clinical Implications

Frequent, small meals

Avoid eating late at night

PPI, H2 blockers, antacids

Avoid irritants: NSAIDS- inhibit COX-1, which protects the stomach lining through promotion of prostaglandin production

Adhere to medicine regimen

Silent Peptic Ulcers

Slow, often undetected

Many patients with peptic ulcers, especially older adults or patients on NSAIDs, do not experience any pain or discomfort

Asymptomatic until a complication such as bleeding or perforation occurs

Peptic Ulcer Disease Diagnostic Tests

Upper Endoscopy - High

H. Pylori testing - High

Barium Swallow - Mod

CBC - Mod

FOBT - Low/Mod

Liver Function Tests - Low

Cellular Blood Count 

A CBC is a basic but important test to evaluate for anemia, which may result from chronic blood loss in patients with PUD. Anemia can manifest as a decrease in hemoglobin and hematocrit levels, indicating gastrointestinal bleeding

Cellular Blood Count Clinical Implications

Helps assess the extent of blood loss in patients with bleeding ulcers and guides further management, including potential transfusions or endoscopic treatment

Fecal Occult Blood Test

Non-invasive test detects hidden (occult) blood in the stool, which may indicate gastrointestinal bleeding, a common complication of ulcers. It is often used in the initial evaluation of suspected PUD, particularly in patients presenting with anemia

Liver Function Tests

Although not specific to PUD, liver function tests may be done to rule out other causes of upper abdominal pain and assess overall GI function, particularly if a differential diagnosis involves hepatobiliary disease.

Gastrectomy Pathophysiology

Removal of a part or the entire stomach to treat conditions like gastric cancer. Total gastrectomy removes the entire stomach, while partial gastrectomy removes a portion.

Alters anatomy, functionality, nutrient absorption, digest, and metabolism.

Gastrectomy Risk Factors

Gastric Cancer

Peptic Ulcer Disease

Gastrectomy Clinical Manifestations

Dumping Syndrome (early or late phases)

Pernicious Anemia

Bile Reflux

Hemorrhage

Gastric Outlet Obstruction

Early Dumping Syndrome

10 - 30 minutes after meals

Occurs when foods especially high in carbohydrates or sugars, rapidly move from the stomach into the small intestine

Nausea

Cramping

Diarrhea

Dehydration

Tachycardia

Hypotension

Bloating

Flushing

Palpitations

Nausea (Dumping Syndrome)

Caused by the rapid movements of undigested bolus of foods from the stomach  to the small intestine, this overstimulates the digestive process (Early)

Cramping (Dumping Syndrome)

Stretches rapidly when it receives a sudden influx of hyperosmolar contents (rich in carbs or sugars). Causing the muscles of the intestines to contract. (Early)

Diarrhea (Dumping Syndrome)

The hyperosmolar nature of food that enters the small intestine draws water from surrounding blood vessels into the intestinal lumen, leads to loose watery stools. (Early)

Dehydration (Dumping Syndrome)

Due to massive shifts to the intestines (osmotic shift) to balance the load of food eaten, a reduction in circulating blood volume occurs. Also diarrhea worsens fluid loss. (Early)

Tachycardia (Dumping Syndrome)

Compensatory measure for fluid shift, from the bloodstream to the intestines, leading to hypovolemia (Early)

Hypotension (Dumping Syndrome)

Low blood pressure due to fluid shifting into the intestine. May feel dizzy, faint, or weak. (Early)

Bloating (Dumping Syndrome)

Happens as the intestine is stretched due to the sudden entry of food and fluids into the small intestine. The rapid filling of the intestines causes them to swell and stretch. (Early)

Flushing (Dumping Syndrome)

Occurs due to vasomotor symptoms triggered by the rapid shift of fluids and a sudden release of gut hormones (like serotonin and histamine) in response to the rapid distention of the intestine. These hormones cause dilation of blood vessels. (Early)

Palpitation (Dumping Syndrome)

Racing or irregular heartbeat occurs as the heart compensates for the sudden drop in blood volume caused by the rapid fluid shift into the intestines. The body's compensatory mechanism is to increase heart rate to maintain blood pressure and perfusion. Can be tachycardic or irregular. (Early)