wk5 - oxy. exemplars

Nursing Exemplars: Pulmonary Embolism, Vitamin B12 Anemia, and Iron Deficiency Anemia

Resource: Ignatavicius 11th Ed., Giddens 4th Ed., & Workman Ch. 17

Exemplar 1: Pulmonary Embolism (PE)

What is it? Pathophysiology
  • Definition: A collection of particulate matter, usually a blood clot from a deep vein thrombosis (DVT), which breaks loose, travels through the right side of the heart, and lodges in the pulmonary artery.
  • Mechanism: This leads to a "dead space" where the lung receives air but no blood flow. It results in impaired gas exchange and potential lung tissue death. Essentially, it acts as a "clog" in the main pipe to the lungs preventing blood from picking up oxygen.
  • One-liner: PE is a sudden, life-threatening blockage in the lung's blood supply that causes the body to starve for oxygen. (Ignatavicius, 596)
Why did I get it? Risk Factors
  • Prolonged Immobility: Bed rest, paralysis, or extended travel lead to blood pooling in the legs, creating a "sludge" that clots.
  • Surgery: Particularly orthopedic surgeries like hip or knee replacements; the trauma of surgery activates the body's "clotting alarm".
  • Central Venous Catheters: IV lines in the neck or groin irritate the vein wall, prompting clot formation.
  • Obesity and Smoking: These factors increase inflammation and make blood "sticky".
  • One-liner: Clots form when blood sits still, when recovering from major surgery, or when veins are irritated by medical tubes. (Ignatavicius, 597)
What will I see? Clinical Manifestations
  • Sudden-onset Dyspnea: Characterized by shortness of breath.
  • Pleuritic Chest Pain: Sharp, stabbing pain intensifying with deep breaths.
  • Tachycardia and Tachypnea: The heart and lungs increase activity to compensate for oxygen deficiency.
  • Feeling of Impending Doom: The patient may appear terrified, wide-eyed, and restless as their brain recognizes a lack of air.
  • One-liner: Expect to see a panicked patient gasping for air, clutching their chest, and sweating as their heart races. (Ignatavicius, 598)
How will I confirm this? Diagnosis
  • CT Pulmonary Angiography (CTPA): A rapid scan using contrast dye to highlight the exact location of the clot.
  • V/Q Scan: Used when dye cannot be administered; it demonstrates the distribution of air relative to blood flow in the lungs.
  • One-liner: Specialized chest scans allow doctors to visualize the blockage and assess the extent of lung involvement. (Ignatavicius, 599)
What labs do I need to monitor?
  • D-Dimer: An elevated level (Normal is < 0.50) indicates that the body is attempting to break down a clot. It acts as a clue rather than proof.
  • Arterial Blood Gases (ABGs): Initially indicate respiratory alkalosis due to hyperventilation, followed by hypoxemia with PaO_2 levels < 80.
  • Priority: Monitor PaO_2 levels to avert respiratory failure.
  • One-liner: Elevated D-Dimer suggests a clot, while Arterial Blood Gases reveal the extent of oxygen deprivation. (Ignatavicius, 599)
What is the treatment?
  • Oxygen Therapy: High-flow oxygen provided to maintain saturations above 92%.
  • Anticoagulants: IV Heparin or Enoxaparin administer to prevent further clot formation.
  • Fibrinolytics: "Clot-busters" like Alteplase, reserved for massive PE due to risks of severe bleeding.
  • Embolectomy: Surgical procedure to remove the clot when pharmacological measures are inadequate.
  • One-liner: Treatment focuses on providing oxygen and administering medications that thin the blood or dissolve the clot to restore blood flow. (Ignatavicius, 600)
What should scare me? Complications
  • Cardiac Arrest: Resulting from the right side of the heart's inability to pump blood through blocked lungs.
  • Pulmonary Infarction: Lung tissue death due to inadequate blood supply.
  • One-liner: The most alarming outcome is sudden death due to heart exhaustion from overcoming the blockage. (Ignatavicius, 599)
Nursing Management: What will I assess?
  • Respiratory Rate and Depth: Monitoring use of accessory neck muscles during breathing.
  • Oxygen Saturation: Checking SpO_2 and evaluating lung sounds for crackles.
  • Cardiac Rhythm: Observing for signs of heart strain or arrhythmias.
  • One-liner: Nurses must monitor both "the monitor and the mouth," ensuring oxygen levels are stable while scanning for respiratory distress. (Ignatavicius, 599)
Nursing Management: What will I do?
  • Positioning: Immediately elevate the head of the bed to High-Fowler's (90 degrees) to facilitate lung expansion.
  • Oxygen Administration: Apply high-flow oxygen via nasal cannula or mask to support respiration.
  • Patient Support: Remain present to calm the patient; anxiety increases oxygen demand.
  • One-liner: Swift actions are necessary to position the patient, deliver oxygen, and maintain calmness to preserve energy. (Ignatavicius, 599)
Nursing Management: What will I teach?

  • Lifestyle Modifications: Avoid crossing legs or wearing restrictive knee-high socks.

  • Mobility: Encourage patients to get up and walk every hour during long trips or post-surgery.

  • Gentle Care Practices: Utilize electric razors and soft toothbrushes to prevent bleeding when on anticoagulants.

  • One-liner: Instruct patients that "movement is medicine" for prevention and "gentle care" is essential while on blood thinners. (Ignatavicius, 603)

  • Overall Reminder: PE is a medical emergency requiring immediate intervention to provide oxygen and stabilize the heart to prevent lung failure.

Exemplar 2: Vitamin B12 Anemia (Pernicious Anemia)

What is it? Pathophysiology
  • Definition: A condition characterized by a failure to absorb Vitamin B12, typically due to the absence of "Intrinsic Factor" which is essential for B12 absorption. Without sufficient B12, red blood cells enlarge excessively and remain trapped in the bone marrow; nerve protective coverings degrade.
  • Mechanism: It represents a deficiency in the "key" that enables the production of healthy blood and the maintenance of nerve function.
  • One-liner: B12 anemia leads to the formation of "giant" ineffective blood cells and deteriorating nerve function because the vitamin is not properly absorbed. (Ignatavicius, 835)
Why did I get it? Risk Factors
  • Gastric Bypass or Stomach Surgery: This may remove the part of the stomach that produces the required "key".
  • Chronic Gastritis: The stomach lining becomes too impaired to function adequately.
  • Strict Veganism: As B12 is primarily found in animal products, insufficiency arises from dietary restrictions.
  • One-liner: The condition develops either due to inadequate dietary intake or physical inability of the stomach to absorb B12. (Ignatavicius, 835)
What will I see? Clinical Manifestations
  • Glossitis: A smooth, very painful "beefy-red" tongue.
  • Paresthesia: Manifested as tingling or numbness in the extremities.
  • Pallor or Jaundice: Skin may appear pale with a yellow tint due to the fragility of enlarged blood cells.
  • Balance Issues: Patients may have difficulty walking steadily, exhibiting a wide gait.
  • One-liner: The patient presents as "yellow-pale", with a sore red tongue and sensations of numbness in their feet. (Ignatavicius, 835)
How will I confirm this? Diagnosis
  • Serum B12 Levels: Typically, these levels are significantly low.
  • Schilling Test: A urine test that assesses the stomach's ability to absorb B12 effectively.
  • One-liner: Blood tests confirm deficient vitamin levels, while absorption tests determine the underlying issue. (Ignatavicius, 835)
What labs do I need to monitor?
  • CBC: This will reveal an elevated mean corpuscular volume (MCV), indicating macrocytic red blood cells.
  • Potassium Levels: Monitoring for hypokalemia post-treatment is crucial, as new blood cell production requires potassium.
  • One-liner: Laboratory results will indicate oversized, ineffective blood cells and necessitate vigilance for significant drops in potassium levels. (Workman, 306)
What is the treatment?
  • B12 Injections (Cyanocobalamin): Administered intramuscularly or deep subcutaneously.
  • High-dose Oral B12: Considered only if the patient has operational stomach and intrinsic factor.
  • One-liner: The primary treatment bypasses the stomach using injections to directly enhance B12 levels in the bloodstream. (Workman, 305)
What should scare me? Complications
  • Permanent Paralysis: Nerve damage may become irreversible if the protective myelin is lost for an extended period.
  • Heart Failure: The heart may become exhausted from continuously pumping ineffective blood.
  • One-liner: The most concerning risk is potentially irreversible nerve damage that may lead to loss of mobility. (Ignatavicius, 835)
Nursing Management: What will I assess?
  • Gait and Balance: Evaluate the ability to walk in a straight line without losing balance.
  • Sensation: Assess the patient's ability to distinguish between hot and cold stimuli on their feet.
  • Oral Health: Determining if tongue soreness is affecting nutritional intake.
  • One-liner: Nurse observations prioritize safety and nerve function as the patient is prone to falls and burns. (Ignatavicius, 835)
Nursing Management: What will I do?
  • Safety Environment: Create a fall-safe setting, offering assistance while walking and removing tripping hazards.
  • B12 Injection Protocol: Utilize the Z-track method for administering injections to prevent skin staining.
  • Dietary Recommendations: Provide soft, cool, bland foods to ease discomfort from tongue soreness.
  • One-liner: The nurse's role involves safeguarding the patient from falls and ensuring proper administration of essential vitamin injections. (LibreTexts 18.6)
Nursing Management: What will I teach?

  • Lifelong Commitment: Explain that if the stomach cannot absorb B12, injections will be a permanent necessity.

  • Temperature Sensitivity: Advise using a thermometer for bath water since the patient may lack sensation.

  • Dietary Inclusion: Encourage the consumption of more animal proteins (meat, eggs, cheese) if dietary restrictions allow.

  • One-liner: Instruct patients that B12 supplementation is lifelong and that safety checks are paramount when sensation is impaired. (Ignatavicius, 835)

  • Overall Reminder: Vitamin B12 anemia is a neurological and hematologic disorder requiring lifelong treatment to maintain mobility and cognitive function.

Exemplar 3: Iron Deficiency Anemia (IDA)

What is it? Pathophysiology
  • Definition: A condition that arises from depleted iron stores, impeding hemoglobin production. Hemoglobin functions as the "oxygen magnet" within red blood cells; hence, inadequate levels yield small, pale cells with poor oxygen transport capacity.
  • Mechanism: IDA is characterized as a "shortage of materials," resulting in diminished blood cells that struggle to carry oxygen. (Ignatavicius, 833)
Why did I get it? Risk Factors
  • Chronic Bleeding: Such as heavy menstruation, gastrointestinal ulcers, or gradual colonic leaks.
  • Poor Dietary Intake: Insufficient consumption of iron-rich foods such as red meat, beans, or leafy greens.
  • High Milk Intake: Excessive calcium from milk hinders iron absorption, commonly seen in toddlers.
  • One-liner: The root of IDA lies in either excessive blood loss or inadequate iron intake necessary for optimal blood health. (Ignatavicius, 833)
What will I see? Clinical Manifestations
  • Severe Fatigue: Patients exhibit extreme tiredness even after a full night's sleep.
  • Fissures: Notable cracks at the corners of the mouth (Cheilosis).
  • Koilonychia: Characterized by nails that are thin and spoon-shaped, dipping inward.
  • Pica: An unusual craving for non-food items such as ice, dirt, or clay.
  • One-liner: Patients often appear "ghostly pale", feel weak, and may present with brittle, dented nails. (Ignatavicius, 833)
How will I confirm this? Diagnosis
  • Ferritin Level: This is the most sensitivity test indicating depleted iron stores.
  • CBC: This test reveals microcytic (small) and hypochromic (pale) blood cells.
  • One-liner: Physicians search for evidence of "small and pale" blood cells alongside low iron storage levels in blood tests. (Ignatavicius, 834)
What labs do I need to monitor?
  • Hemoglobin and Hematocrit (H&H): These values provide insight into the patient's current oxygen-carrying capacity.
  • Stool for Occult Blood: Assess for hidden blood loss from potential ulcers or malignancy.
  • One-liner: Regular monitoring of blood counts assists in determining the severity of anemia while stool analysis checks for internal bleeding. (Workman, 302)
What is the treatment?
  • Oral Ferrous Sulfate: Prescribed iron supplements in tablet form.
  • IV/IM Iron Dextran: Utilized when oral supplementation is insufficient or if gastrointestinal issues arise.
  • Diet: Incorporation of red meat, organ meats, spinach, and kidney beans.
  • One-liner: Treatment strategies involve "refueling" the body with iron via supplements and dietary sources. (Workman, 303)
What should scare me? Complications
  • Heart Failure: The heart compensates by pumping rapidly to deliver adequate oxygen to the brain.
  • Fetal Distress: In pregnant women, inadequate maternal blood supply may hinder fetal growth.
  • One-liner: The major concern is potential heart failure stemming from laboring to circulate thin, oxygen-poor blood. (Ignatavicius, 833)
Nursing Management: What will I assess?
  • Activity Tolerance: Determine if the patient experiences dizziness or shortness of breath with minimal exertion.
  • Skin and Conjunctiva Assessment: Check eyelids for paleness rather than the usual pink hue.
  • Bleeding History: Inquire about heavy menstrual cycles or dark stools indicative of bleeding.
  • One-liner: Nurses evaluate the patient’s energy levels while investigating potential sources of blood loss. (Ignatavicius, 833)
Nursing Management: What will I do?
  • Activity Spacing: Encourage alternate resting periods between activities such as bathing, walking, and dressing changes.
  • Iron Supplement Administration: Administer on an empty stomach alongside Vitamin C (e.g., orange juice) to promote absorption.
  • Dietary Considerations: Advise to keep iron away from calcium-rich foods, tea, and antacids that could inhibit metals absorption.
  • One-liner: The nurse aids in conserving patient energy while making certain iron supplements are ingested alongside the correct "partners" (Vitamin C). (Workman, 302)
Nursing Management: What will I teach?

  • Stool Color Expectation: Inform that stool may appear black or dark green as a common outcome and not indicative of bleeding.

  • Iron Side Effects: Address potential constipation issues; advocate hydration and increased fiber intake through fruits and beans.

  • Use of Straw for Liquid Iron: Suggest using a straw to prevent staining of teeth when taking liquid iron.

  • One-liner: Educate patients about iron's coloring effect on stool and recommend straws to protect tooth enamel from staining. (Workman, 302)

  • Overall Reminder: Iron Deficiency Anemia is a prevalent, treatable condition that necessitates dietary modifications and supplementation to restore adequate oxygen delivery in the body.