🌿 A pulmonary embolism (PE) is a blockage in the pulmonary circulation, most often caused by a blood clot traveling from the deep veins of the legs or pelvis.

🌿 PE can reduce blood flow to lung tissue, impair oxygenation, increase pulmonary vascular resistance, and place strain on the right side of the heart.

🌿 Even if a client is hemodynamically stable or has few symptoms, treatment is still required because the clot can enlarge, recur, or lead to life-threatening complications.

🌿 Standard treatment usually includes anticoagulation to prevent clot extension and new clot formation.

🌿 Severe or unstable PE may require thrombolytics, embolectomy, oxygen support, IV fluids, vasopressors, or intensive monitoring.

🌿 Nursing care includes monitoring oxygenation, chest pain, dyspnea, bleeding risk from anticoagulants, vital signs, and signs of worsening right-sided heart strain.

❌ Treatment is not needed if the client is asymptomatic.

❌ An asymptomatic PE can still progress or recur.

❌ Treatment is needed to prevent serious complications.

❌ Treatment is not needed if the pulmonary embolism is intermediate.

❌ Intermediate-risk PE still requires treatment and close monitoring.

❌ Risk level guides intensity of treatment, not whether treatment is needed.

❌ Treatment is not needed if the client is hemodynamically stable.

❌ Stable clients still need anticoagulation unless contraindicated.

❌ Stability does not mean the embolism is harmless.

🔶 In ARDS, inflammatory damage makes the alveolar-capillary membrane leaky, allowing fluid and proteins to enter the alveoli.

🔶 This causes alveolar flooding, surfactant dysfunction, atelectasis, and severe inflammation.

🔶 As a result, the lungs become stiff, and pulmonary compliance decreases, meaning more pressure is needed to expand the lungs during breathing.

🔶 Decreased compliance increases the work of breathing and contributes to severe respiratory distress, tachypnea, hypoxemia, and the need for mechanical ventilation.

🔶 ARDS is also associated with refractory hypoxemia because oxygen has difficulty crossing the damaged alveoli into the blood.

🔶 Nursing priorities include monitoring oxygenation, ventilator settings, lung sounds, ABGs, positioning, and preventing complications from high-pressure ventilation.

❌ Decreased pulmonary arterial pressure due to V/Q mismatch

❌ ARDS does not typically decrease pulmonary arterial pressure.

❌ Pulmonary vascular resistance and pressure may increase due to hypoxic vasoconstriction and lung injury.

❌ Impaired carbon dioxide elimination due to shunting

❌ Shunting mainly causes severe hypoxemia, not the primary issue of carbon dioxide elimination.

❌ Carbon dioxide may be affected later, but oxygenation failure is the hallmark.

❌ Hypoxemia due to dead space

❌ Dead space involves ventilation without adequate perfusion, such as pulmonary embolism.

❌ ARDS hypoxemia is mainly due to intrapulmonary shunting and alveolar collapse/fluid, not dead space.

⚡ Emphysema causes respiratory failure through ventilation-perfusion mismatch because damaged alveoli cannot exchange oxygen and carbon dioxide effectively.

⚡ In emphysema, alveolar walls are destroyed, reducing surface area for gas exchange and causing air trapping.

⚡ Some areas of the lungs receive ventilation but have poor perfusion or poor usable exchange surface, creating inefficient gas exchange.

⚡ This can lead to hypoxemia, carbon dioxide retention, dyspnea, prolonged expiration, barrel chest, decreased breath sounds, and use of accessory muscles.

⚡ V/Q mismatch is one of the most common mechanisms of hypoxemic respiratory failure and is commonly seen in COPD conditions such as emphysema.

⚡ Nursing care includes oxygen therapy as prescribed, bronchodilators, breathing techniques such as pursed-lip breathing, energy conservation, and monitoring for worsening respiratory failure.

❌ Congestive heart failure

❌ Congestive heart failure can cause pulmonary edema and hypoxemic respiratory failure.

❌ However, among the options, emphysema is the stronger example of chronic V/Q mismatch from lung disease.

❌ Flail chest

❌ Flail chest causes impaired ventilation due to unstable chest wall movement.

❌ It is more related to mechanical ventilatory failure than classic V/Q mismatch.

❌ Guillain-Barré syndrome

❌ Guillain-Barré syndrome can weaken respiratory muscles and cause hypoventilation.

❌ This leads more to ventilatory failure with carbon dioxide retention, not primary V/Q mismatch.

🔷 Neurologist

🔷 A neurologist may be included when respiratory failure is related to impaired nerve or muscle function.

🔷 Conditions such as Guillain-Barré syndrome, myasthenia gravis, spinal cord injury, stroke, or neuromuscular weakness can reduce the client’s ability to breathe effectively.

🔷 The neurologist helps evaluate nerve function, respiratory muscle weakness, and need for disease-specific treatment.

🔷 Pharmacist

🔷 A pharmacist is important because clients with respiratory failure often receive multiple medications such as bronchodilators, antibiotics, sedatives, diuretics, anticoagulants, or vasopressors.

🔷 The pharmacist helps check medication safety, dosing, interactions, renal/hepatic adjustments, and adverse effects.

🔷 This is especially important because some drugs can worsen respiratory status, such as opioids, sedatives, and benzodiazepines.

🔷 Cardiologist

🔷 A cardiologist may be involved when respiratory failure is related to cardiac causes such as heart failure, pulmonary edema, cardiogenic shock, dysrhythmias, or myocardial infarction.

🔷 Cardiac dysfunction can reduce oxygen delivery and cause fluid backup into the lungs.

🔷 The cardiologist helps manage hemodynamics, cardiac medications, fluid status, and oxygen demand.

🔷 Respiratory therapist

🔷 A respiratory therapist is a key team member in respiratory failure care.

🔷 They assist with oxygen therapy, nebulizer treatments, airway clearance, arterial blood gases, noninvasive ventilation, ventilator management, and breathing treatments.

🔷 They also help assess response to respiratory interventions and support weaning from mechanical ventilation when appropriate.

🔷 Pulmonologist

🔷 A pulmonologist specializes in lung disease and is commonly involved in respiratory failure.

🔷 They help diagnose and manage conditions such as ARDS, COPD exacerbation, pneumonia, pulmonary embolism, asthma, pleural disease, and interstitial lung disease.

🔷 They may guide ventilator strategies, bronchoscopy, thoracentesis, and advanced respiratory treatment planning.

💎 Even when a client with pleural effusion is receiving oxygen therapy, the nurse must monitor for hypoxia because oxygen may not fully correct impaired gas exchange.

💎 Pleural effusion occurs when excess fluid builds up in the pleural space, preventing full lung expansion.

💎 This compression can cause atelectasis, ventilation-perfusion mismatch, dyspnea, decreased breath sounds, tachypnea, and low oxygen saturation.

💎 If the effusion worsens or the lung remains compressed, the client may continue to have inadequate oxygenation despite supplemental oxygen.

💎 The nurse should monitor SpO₂, respiratory rate, work of breathing, lung sounds, mental status, skin color, ABGs, and signs of respiratory distress.

💎 Worsening hypoxia may require provider notification, increased oxygen support, positioning, thoracentesis, or further respiratory intervention.

❌ Increased partial oxygen levels (PaO₂)

❌ Increased PaO₂ is usually an expected effect of oxygen therapy, not a complication.

❌ The nurse is more concerned about inadequate oxygenation despite therapy.

❌ Dehydration

❌ Oxygen therapy does not usually cause systemic dehydration.

❌ Dry mucous membranes can occur with oxygen use, but dehydration is not the major complication in this scenario.

❌ Hyperthermia

❌ Oxygen therapy does not typically cause hyperthermia.

❌ Fever would suggest infection, inflammation, or another process rather than a direct oxygen therapy complication.

🌿 Tension pneumothorax occurs when air enters the pleural space and cannot escape, causing pressure to build inside the chest.

🌿 As pressure increases, the affected lung collapses and the mediastinum shifts away from the affected side, causing tracheal deviation.

🌿 This pressure compresses the great vessels, especially the vena cava, which reduces venous return to the heart.

🌿 When venous return decreases, ventricular filling decreases, stroke volume drops, and cardiac output decreases.

🌿 This can quickly lead to hypotension, tachycardia, jugular venous distention, cyanosis, severe respiratory distress, shock, and cardiac arrest if not treated immediately.

🌿 Tension pneumothorax is a life-threatening emergency requiring rapid decompression, often with needle decompression followed by chest tube placement.

❌ Increased venous return

❌ Tension pneumothorax decreases venous return because intrathoracic pressure compresses major veins.

❌ Reduced venous return is what leads to decreased cardiac output and shock.

❌ Respiratory alkalosis

❌ Early respiratory distress may cause rapid breathing, but the major expected consequence after tracheal deviation is cardiovascular compromise.

❌ The most dangerous finding is decreased cardiac output from impaired venous return.

❌ Dilated ventricles

❌ Ventricles do not dilate from tension pneumothorax as the key immediate effect.

❌ The heart receives less blood due to reduced venous return, leading to poor filling and decreased output.

🔶 A CT scan is the preferred and most sensitive imaging study for diagnosing flail chest and identifying associated thoracic injuries.

🔶 Flail chest occurs when multiple adjacent ribs are fractured in at least two places, creating a free-floating chest wall segment.

🔶 CT imaging gives detailed views of rib fractures, lung contusions, pneumothorax, hemothorax, pulmonary injury, and chest wall instability.

🔶 This is especially important in trauma clients because flail chest is often associated with significant underlying lung injury.

🔶 The nurse should anticipate close monitoring for respiratory distress, pain, decreased oxygenation, paradoxical chest movement, and need for ventilatory support.

🔶 CT is more accurate than plain chest x-ray for detecting the full extent of rib fractures and complications.

❌ MRI

❌ MRI is not the preferred initial diagnostic study for flail chest in trauma.

❌ It is slower, less practical in unstable trauma clients, and not ideal for acute rib fracture evaluation.

❌ Chest x-ray

❌ A chest x-ray can show rib fractures and complications, but it may miss some fractures or underestimate injury severity.

❌ CT scan provides more detailed and accurate evaluation.

❌ Ultrasound

❌ Ultrasound may help detect pneumothorax or pleural fluid at bedside.

❌ It is not the preferred method for fully diagnosing flail chest and mapping rib fractures.

⚡ Stiffened thorax

⚡ Older adults often have a stiffer thoracic cage due to calcification of costal cartilage, decreased chest wall flexibility, and age-related musculoskeletal changes.

⚡ A stiff thorax limits chest expansion, making it harder to increase ventilation after trauma such as flail chest.

⚡ With flail chest, painful rib fractures already reduce breathing depth, so decreased chest wall flexibility further increases the risk of atelectasis, hypoventilation, pneumonia, and respiratory failure.

⚡ The nurse should monitor respiratory rate, depth, oxygen saturation, pain control, and ability to cough and deep breathe.

⚡ Osteoporosis

⚡ Osteoporosis increases fracture risk because bones become weaker and more fragile with age.

⚡ Older adults are more likely to sustain multiple rib fractures from trauma that may be less severe than trauma required in younger adults.

⚡ Multiple rib fractures can create chest wall instability and worsen flail chest complications.

⚡ Bone fragility also delays healing and increases pain, immobility, and respiratory compromise.

⚡ Reduced ability to compensate for gas exchange alterations

⚡ Older adults have reduced physiologic reserve, meaning they may not compensate well when oxygenation or ventilation becomes impaired.

⚡ Age-related changes can include decreased lung elasticity, weaker respiratory muscles, reduced cough effectiveness, and lower reserve during stress.

⚡ In flail chest, pain and paradoxical chest movement impair ventilation, while lung contusion may impair oxygenation.

⚡ Because older adults compensate poorly, they are at higher risk for hypoxemia, hypercapnia, pneumonia, respiratory failure, and need for mechanical ventilation.

❌ Increased elastin

❌ Aging is associated with decreased elastic recoil and loss of lung elasticity, not increased elastin.

❌ Reduced elasticity contributes to impaired ventilation and gas exchange reserve.

❌ Decreased anteroposterior diameter

❌ Older adults often develop an increased, not decreased, anteroposterior diameter due to age-related chest wall and lung changes.

❌ This option does not best describe the age-related risks that worsen flail chest complications.