NCLEX-RN® Respiratory Disorders: Asthma, COPD, Pneumonia, PE, and Chest Tubes

High-yield respiratory review for the NCLEX-RN®: distinguishing asthma from COPD, recognising pneumonia and pulmonary embolism, and managing chest tubes safely.

The big picture

Respiratory questions are among the most frequently tested on the NCLEX-RN® — primarily under Physiological Integrity: Physiological Adaptation (11–17% of the exam). The nurse's priority is always airway and breathing first. This guide covers the five respiratory conditions that appear most on NCLEX®: asthma, COPD, pneumonia, pulmonary embolism, and chest tube management.

Asthma

Asthma is a chronic inflammatory airway disease with reversible bronchospasm. On NCLEX®, you need to recognize an acute attack and act fast.

Pathophysiology in plain language

During an attack: bronchospasm → airway narrowing → air trapping → ↑ work of breathing. Triggers include allergens, cold air, exercise, smoke, and respiratory infections.

Assessment findings

NCLEX® priority: A patient with asthma who had wheezing that suddenly stops without improvement is getting worse — the silent chest means no air is moving. This is a respiratory emergency.

Treatment priority order

1. Position: High Fowler's (maximizes lung expansion)
2. Oxygen to keep SpO₂ ≥ 94%
3. Short-acting beta-2 agonist (SABA): Albuterol (Ventolin) — first-line bronchodilator; use before ipratropium
4. Ipratropium (Atrovent): Anticholinergic bronchodilator — used in combination during acute attacks
5. Systemic corticosteroids (prednisone, methylprednisolone) — reduce inflammation; onset is hours, not minutes
6. Magnesium sulfate IV — smooth muscle relaxant for severe attacks unresponsive to above

Inhaler teaching (tested frequently)

• SABA (albuterol): Rescue inhaler — use when symptoms occur. GINA 2024 update: SABA-only therapy is no longer recommended for any asthma severity. Even for mild asthma, low-dose ICS-formoterol (e.g., budesonide-formoterol) is now the preferred reliever (Track 1) because SABA-only use without an inhaled corticosteroid increases risk. NCLEX® may still test albuterol as the acute bronchodilator; know that it should be paired with ICS controller therapy
• ICS (fluticasone): Controller inhaler — rinse mouth after use to prevent oral candidiasis
• LABA (salmeterol): Never use LABA alone in asthma (increases mortality risk); only with ICS

Chronic obstructive pulmonary disease (COPD)

COPD includes chronic bronchitis and emphysema. Unlike asthma, airflow limitation is not fully reversible. Smoking is the primary cause in the US.

Chronic bronchitis vs. emphysema

The oxygen controversy NCLEX® tests

COPD patients with chronic CO₂ retention require careful O₂ titration. The traditional "hypoxic drive" explanation (that high O₂ suppresses breathing) is now considered an oversimplification. The current understanding is that high-flow O₂ causes V/Q mismatch worsening and the Haldane effect (CO₂ released from haemoglobin), both raising PaCO₂. The NCLEX® target remains 88–92% SpO₂.

NCLEX® rule: For COPD patients, start O₂ at 1–2 L/min via nasal cannula and titrate to SpO₂ of 88–92% — not the 94–98% target used for most patients.

Pursed-lip breathing — why it matters

Pursed-lip breathing creates back-pressure that keeps small airways open longer, reducing air trapping. Teach patients to breathe in through the nose (2 counts) and out through pursed lips (4 counts). NCLEX® asks you to recognize this as appropriate technique.

COPD exacerbation: priority signs

• Increased dyspnea beyond baseline
• Change in sputum color (yellow/green = likely infection)
• Confusion or decreased LOC (CO₂ narcosis)
• ABGs showing respiratory acidosis (pH < 7.35, PaCO₂ > 45)

Pneumonia

Pneumonia is infection and inflammation of the alveoli, leading to impaired gas exchange.

Types NCLEX® distinguishes

Assessment priority findings

• Fever, chills, diaphoresis
• Productive cough with purulent, rust-colored, or blood-tinged sputum
• Crackles over the affected lobe
• Decreased breath sounds over consolidated area
• Pleuritic chest pain (worsens with deep breathing)
• Confusion in older adults (often the first/only sign)

Nursing interventions

1. Obtain sputum culture before starting antibiotics (culture first, treat second)
2. Administer antibiotics as ordered — ensure first dose given promptly
3. Encourage deep breathing and coughing every 2 hours; incentive spirometry
4. Semi-Fowler's or high Fowler's positioning
5. Hydration — thins secretions (unless restricted)
6. Chest physiotherapy if secretions are thick and patient cannot expectorate

Pneumonia prevention teaching

• Pneumococcal vaccine — options include PCV20 (Prevnar 20), PCV21 (Capvaxive, approved June 2024), or PPSV23 for high-risk groups; consult current ACIP schedule
• Influenza vaccine annually — influenza is a leading cause of secondary bacterial pneumonia
• Aspiration precautions: keep HOB elevated during tube feedings; check placement before each feed

Pulmonary embolism (PE)

A pulmonary embolism is a thrombus (usually from a DVT) that lodges in a pulmonary artery, blocking blood flow to the lungs. It is the most immediately life-threatening respiratory emergency tested on NCLEX®.

Classic triad (Virchow's triad — risk factors)

1. Venous stasis (immobility, long travel)
2. Hypercoagulability (pregnancy, cancer, birth control pills, clotting disorders)
3. Endothelial injury (surgery, trauma)

Clinical presentation NCLEX® uses

• Sudden onset dyspnea (most common symptom)
• Pleuritic chest pain (sharp, worse with breathing)
• Tachycardia and tachypnea
• Hemoptysis (blood-tinged sputum)
• Decreased SpO₂ despite supplemental oxygen
• Anxiety and sense of doom
• Signs of DVT in one leg (unilateral swelling, warmth, redness)

NCLEX® key: PE should be suspected whenever a post-op or immobile patient suddenly develops dyspnea, chest pain, and tachycardia.

Diagnostic and priority nursing actions

1. Notify provider immediately — PE is a medical emergency
2. Administer high-flow oxygen to maintain SpO₂
3. Do not leave the patient — monitor for hemodynamic instability
4. Prepare for D-dimer (high negative predictive value — rules OUT PE when negative; does NOT confirm PE when positive), CT pulmonary angiography (gold-standard diagnostic test), or V/Q scan
5. Administer anticoagulation as ordered: heparin IV (immediate) → warfarin or DOAC (long-term)
6. Monitor for complications: pulmonary infarction, right heart failure, respiratory failure

PE prevention — what to teach post-op patients

• Sequential compression devices (SCDs) while in bed
• Early ambulation as soon as cleared
• Leg exercises (ankle pumps, dorsiflexion) when immobile
• Adequate hydration
• Report any unilateral leg swelling, warmth, or pain immediately

Chest tubes

Chest tubes drain air (pneumothorax), blood (hemothorax), or fluid from the pleural space. NCLEX® tests tube management and troubleshooting, not insertion.

Water-seal drainage system basics

The typical system has 3 chambers:

1. Collection chamber: Collects drainage from the pleural space
2. Water-seal chamber: 2 cm of water; acts as a one-way valve allowing air out but not in
3. Suction control chamber: Controls suction level (usually –20 cm H₂O); bubbles gently when active

What's normal vs. abnormal

Priority nursing interventions

• Keep system below chest level at all times
• Keep chest tube connections tight (tape all connections)
• Never clamp a chest tube unless ordered (clamp only briefly to check for air leak or when changing system)
• If tube is accidentally pulled out: apply an occlusive dressing (petroleum gauze) taped on 3 sides only (flutter valve effect — allows air to escape, prevents tension pneumothorax)
• If the water-seal chamber is cracked: submerge end of tube in 2 cm sterile water immediately, then obtain a new system

Tension pneumothorax — recognize and act immediately

• Tracheal deviation (away from affected side)
• Absent breath sounds on affected side
• Severe respiratory distress, hypotension, JVD
• Action: This is an emergency. Notify provider. Prepare for needle decompression.

NCLEX® clinical judgment focus

For any respiratory question, apply this order:

1. Position first (upright) — easy, immediate, nurse-driven
2. Oxygen next — match delivery device to severity
3. Assess and report — SpO₂, RR, work of breathing
4. Medications — bronchodilators, antibiotics, anticoagulants as ordered

Common NCLEX® traps:

• Giving high-flow O₂ to a COPD patient — know the 88–92% target
• Clamping a chest tube when continuous bubbling is found — that causes tension pneumothorax
• Missing the silent chest in asthma — no wheezing ≠ improvement
• Ignoring tachycardia after surgery — think PE until proven otherwise

FAQ

What is the first nursing action for a patient with sudden dyspnea post-surgery?

Notify the provider and assess the patient immediately. Sudden dyspnea post-op should make you suspect pulmonary embolism. Apply oxygen, perform a focused assessment (SpO₂, HR, BP, breath sounds, leg assessment), and prepare for emergency diagnostics.

Can a COPD patient ever receive high-flow oxygen?

Yes, during a severe exacerbation that is immediately life-threatening. However, start low (1–2 L/min) and titrate carefully, monitoring for respiratory depression. The target SpO₂ is 88–92%, not the usual 94–98%.

When is continuous chest tube bubbling an emergency?

Continuous bubbling in the water-seal chamber indicates an air leak. First check all external connections (they may have loosened). If connections are intact and bubbling continues, the leak may be from the pleural space or a damaged tube — notify the provider.

What is the first intervention for a dislodged chest tube?

Immediately apply a petroleum (Vaseline) gauze dressing and tape it on three sides only — this creates a flutter valve that lets trapped air escape while preventing air from entering the pleural space. Then call the provider.

What makes aspiration pneumonia different?

Aspiration pneumonia is caused by inhaling oropharyngeal or gastric contents. It tends to involve the dependent lung lobes (right lower and middle lobes in the upright patient, posterior segments when supine). Risk factors include dysphagia, decreased LOC, NG tube feeding, and vomiting. Prevention: keep HOB elevated ≥ 30° during feeding.

Key takeaways

• Asthma: Albuterol first. Silent chest = emergency. Teach: SABA before ICS inhaler, rinse mouth after steroid inhaler.
• COPD: Target SpO₂ 88–92% (mechanism: V/Q mismatch + Haldane effect, not simply "suppressed hypoxic drive"). Pursed-lip breathing reduces air trapping. Exacerbation signs: increased dyspnea, colour change in sputum, confusion.
• Pneumonia: Culture before antibiotics. Crackles, rust-colored sputum, fever. Encourage deep breathing and ambulation. Vaccinate.
• PE: Sudden dyspnea + tachycardia + pleuritic pain = suspect PE. Oxygen, notify provider, anticoagulation.
• Chest tubes: Tidaling is normal, continuous bubbling is not. Never clamp. Dislodged tube = 3-sided occlusive dressing.

Sources: NCSBN NCLEX-RN® 2023 Test Plan; U.S. National Library of Medicine MedlinePlus — Lung Diseases; CDC Respiratory Diseases.

See also:

• NCLEX-RN® Oxygenation and Ventilation
• NGN Case Study: COPD Exacerbation
• NGN Case Study: Pulmonary Embolism
• NCLEX-RN® Pharmacology Guide
• NCLEX-RN® Lab Values Guide

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