Respiratory Nursing Study Guide: NCLEX Notes on Diseases, Medications, and Interventions

Quick overview: Use this respiratory nursing study guide to organize assessment findings, oxygenation problems, medications, and nursing priorities by condition.

How to use this nursing study guide

• Connect each finding to the underlying gas-exchange problem
• Separate assessment cues from immediate nursing actions
• Practice explaining why each intervention matters

Educational use only: this article supports nursing-school review and does not replace course materials, clinical judgment, facility policy, or guidance from a licensed instructor or clinician.

This guide covers every major respiratory topic nursing students need to know: disease processes, medications, nursing interventions, ABG interpretation, and NCLEX-specific priority tips.

Why Respiratory Is High-Yield for NCLEX

The NCLEX-RN prioritizes safe, effective care above everything else. Respiratory problems are emergencies — nurses must recognize and respond to them immediately. That’s why respiratory content appears so consistently on the exam: in direct clinical questions, in priority-setting scenarios, and throughout pharmacology.

The core rule to memorize: if a patient has a respiratory problem, airway and breathing always come first in answer selection.

Normal Respiratory Values to Know

• Respiratory rate (adults): 12–20 breaths/min
• SpO2 normal range: 95–100%
• Normal PaO2: 80–100 mmHg
• Normal PaCO2: 35–45 mmHg
• Normal pH: 7.35–7.45
• Normal HCO3: 22–26 mEq/L

Major Respiratory Conditions: Assessment, Interventions, and Medications

Asthma

What it is: A chronic inflammatory airway disease causing reversible bronchoconstriction, mucosal edema, and increased mucus production. Triggers include allergens, cold air, exercise, and irritants.

Assessment findings:

• Expiratory wheezing — the classic finding
• Chest tightness, shortness of breath, coughing (often worse at night)
• Prolonged expiratory phase
• Absent breath sounds during a severe attack — indicates the airway is too constricted for air movement; this is a danger sign, not improvement

Priority nursing interventions:

• Position upright: high Fowler’s (90 degrees) to maximize lung expansion
• Administer short-acting bronchodilator (albuterol) immediately
• Monitor SpO2 continuously; apply supplemental oxygen as needed
• Teach proper metered-dose inhaler (MDI) technique and peak flow monitoring

Key medications:

• SABA (rescue inhaler): Albuterol — onset 5–15 minutes; use first during acute episodes
• ICS (maintenance): Budesonide, fluticasone — reduce airway inflammation; always instruct patients to rinse mouth after use to prevent oral candidiasis
• LABA: Salmeterol — never used alone in asthma; must always be combined with ICS
• Leukotriene modifier: Montelukast — daily oral maintenance medication

NCLEX tip: Status asthmaticus — a severe attack unresponsive to bronchodilators — is a medical emergency. Priority is airway management and preparation for possible intubation.

COPD (Chronic Obstructive Pulmonary Disease)

What it is: Progressive, irreversible airway obstruction. COPD includes two overlapping presentations:

• Chronic bronchitis (“Blue Bloater”): Productive cough lasting 3+ months for 2+ consecutive years; cyanosis, peripheral edema
• Emphysema (“Pink Puffer”): Destruction of alveolar walls; barrel chest, pursed-lip breathing, use of accessory muscles

Assessment findings:

• Barrel chest (emphysema)
• Pursed-lip breathing and accessory muscle use
• Prolonged expiratory phase
• SpO2 typically 88–92% — this is their normal baseline, not a value to correct aggressively
• Productive cough with mucus (chronic bronchitis)

Priority nursing interventions:

• Oxygen target: SpO2 88–92% — COPD patients rely on low oxygen levels (hypoxic drive) to stimulate breathing; excess oxygen suppresses this drive and can cause respiratory failure
• Position: high Fowler’s or tripod (lean forward with elbows on knees) to reduce work of breathing
• Teach pursed-lip breathing: inhale through nose for 2 counts, exhale slowly through pursed lips for 4 counts
• Administer bronchodilators as ordered; encourage smoking cessation

Key medications:

• SAMA/LAMA (anticholinergics): Ipratropium (short-acting), tiotropium (long-acting) — reduce mucus and cause bronchodilation
• SABA/LABA: Albuterol for rescue, salmeterol for maintenance
• Systemic corticosteroids: Prednisone — used during acute exacerbations, short course

NCLEX tip: “A COPD patient is receiving oxygen — what SpO2 do you target?” The answer is 88–92%. This is one of the single most commonly tested COPD facts on the NCLEX-RN.

Pneumonia

What it is: Infection of the lung parenchyma causing consolidation and impaired gas exchange. Community-acquired pneumonia (CAP) differs from hospital-acquired pneumonia (HAP) in causative organisms and treatment approach.

Assessment findings:

• Fever, chills, fatigue, malaise
• Productive cough — rust-colored sputum is classic for lobar pneumonia caused by Streptococcus pneumoniae
• Pleuritic chest pain: sharp, localized, worsens with deep inspiration or coughing
• Crackles (rales) on auscultation over affected area
• Dullness to percussion over consolidation
• Increased tactile fremitus

Priority nursing interventions:

• Administer prescribed antibiotics on time — never delay the first dose
• Encourage deep breathing and coughing exercises every 1–2 hours while awake
• Incentive spirometer use to prevent atelectasis and further consolidation
• Increase fluid intake to thin secretions (unless contraindicated by cardiac or renal status)

NCLEX tip: Know the auscultation pattern — crackles and dullness to percussion over the affected area. Differentiate from heart failure, which causes bilateral crackles, peripheral edema, and elevated BNP.

Pulmonary Embolism (PE)

What it is: A thrombus — usually originating from a DVT — that travels to and obstructs a pulmonary artery. A life-threatening emergency requiring immediate nursing action.

Assessment findings (sudden onset):

• Sudden dyspnea — the most common first symptom
• Sharp pleuritic chest pain, worse with breathing
• Tachycardia and tachypnea
• Anxiety, restlessness, and a sense of impending doom
• Decreased SpO2 that may not respond to supplemental oxygen in large emboli

Risk factors — Virchow’s Triad: Venous stasis (immobility, long flights, post-surgical bed rest), endothelial damage (trauma, surgery), and hypercoagulability (clotting disorders, oral contraceptives, cancer).

Priority nursing interventions:

• Call for help immediately — this is a medical emergency
• High Fowler’s position and high-flow supplemental oxygen
• Establish IV access; prepare for anticoagulation therapy
• Monitor vital signs and cardiac rhythm continuously

Key medications:

• Heparin IV infusion: Immediate anticoagulation — monitor aPTT every 6 hours initially
• LMWH (enoxaparin): Subcutaneous; does not require aPTT monitoring
• DOACs: Rivaroxaban, apixaban — oral anticoagulants for treatment and prevention
• Thrombolytics (tPA): Reserved for massive PE with hemodynamic instability only

NCLEX tip: Sudden dyspnea + pleuritic chest pain + recent surgery or immobility = think PE immediately. Your first action is airway and oxygen, then notify the provider.

Pneumothorax

What it is: Air in the pleural space causing lung collapse. Types include spontaneous (most common in tall, thin young males or COPD patients), traumatic, and tension pneumothorax.

Assessment findings:

• Sudden, sharp unilateral chest pain
• Absent or markedly diminished breath sounds on the affected side
• Hyperresonance to percussion on the affected side
• Tachycardia and hypoxia

Tension pneumothorax — life-threatening emergency:

• All findings above PLUS: tracheal deviation away from the affected side
• Hypotension and signs of obstructive shock
• Jugular venous distension (JVD)

Priority nursing interventions:

• High Fowler’s position; administer supplemental oxygen
• Prepare for chest tube insertion (treatment for most pneumothoraces)
• Tension pneumothorax emergency: Immediate needle decompression at the 2nd intercostal space, midclavicular line on the affected side — chest tube follows after decompression

NCLEX tip: Tracheal deviation + absent breath sounds + hypotension = tension pneumothorax = needle decompression first. This is the one scenario where intervention precedes contacting the provider.

ABG Interpretation: Step-by-Step Framework

Arterial blood gases appear frequently on both nursing school exams and the NCLEX. Use the same consistent approach every time:

1. Assess pH: Below 7.35 = acidosis; above 7.45 = alkalosis
2. Check PaCO2: This is the respiratory value (controlled by the lungs). Elevated CO2 = respiratory acidosis; decreased CO2 = respiratory alkalosis
3. Check HCO3: This is the metabolic value (controlled by the kidneys). Decreased HCO3 = metabolic acidosis; elevated HCO3 = metabolic alkalosis
4. Match the primary disorder: Whichever value (CO2 or HCO3) moves in the same direction as the pH disturbance is the primary cause

• Respiratory acidosis: pH ↓ + PaCO2 ↑ — examples: COPD exacerbation, opiate overdose, hypoventilation
• Respiratory alkalosis: pH ↑ + PaCO2 ↓ — examples: anxiety hyperventilation, pain, mechanical over-ventilation
• Metabolic acidosis: pH ↓ + HCO3 ↓ — examples: DKA, renal failure, lactic acidosis, severe diarrhea
• Metabolic alkalosis: pH ↑ + HCO3 ↑ — examples: prolonged vomiting, NG suctioning without replacement, excess antacid use

Oxygen Delivery Devices: What Nurses Need to Know

• Nasal cannula: 1–6 L/min, 24–44% FiO2 — most comfortable; for patients with mild hypoxia or who need long-term oxygen
• Simple face mask: 6–10 L/min, 35–55% FiO2 — minimum 5 L/min required to prevent CO2 rebreathing
• Non-rebreather mask: 10–15 L/min, up to 90% FiO2 — for acute hypoxic emergencies requiring high-concentration oxygen
• Venturi mask: Delivers precise, controlled FiO2 (24–50%) — the preferred device for COPD patients because it provides exact oxygen concentration

10 NCLEX Tips for Respiratory Nursing Questions

1. Airway and breathing problems are always the highest priority — answer accordingly
2. COPD oxygen target is 88–92% SpO2, not 95–100%
3. Pursed-lip breathing is the primary technique to teach COPD patients for dyspnea management
4. Sudden dyspnea + chest pain + recent immobility or surgery → think pulmonary embolism
5. Tracheal deviation + absent breath sounds + hypotension = tension pneumothorax = needle decompression immediately
6. Crackles = fluid in the alveoli (pneumonia, pulmonary edema)
7. Wheezing = bronchoconstriction (asthma, COPD exacerbation)
8. Always instruct patients to rinse mouth after inhaled corticosteroids — prevents oral candidiasis
9. Never use LABA (salmeterol, formoterol) alone in asthma — always pair with ICS
10. For incentive spirometer use: instruct the patient to inhale slowly and deeply, not to blow out

For comprehensive respiratory notes organized by condition — covering medications, lab values, and NCLEX priority tips all in one place — see the Lectures Note Respiratory Bundle.

Official Resources and Further Reading

External References

• Global Initiative for Chronic Obstructive Lung Disease (GOLD) — COPD staging, spirometry criteria, and evidence-based management guidelines
• American Thoracic Society (ATS) — clinical practice guidelines for pneumonia, PE, and respiratory disease management

Related Articles on Lectures Note

• Respiratory Nursing Bundle — comprehensive study notes on respiratory diseases, medications, and NCLEX interventions
• Critical Care Nursing Study Notes — ventilator management, ARDS, and ICU respiratory care

Frequently Asked Questions

What respiratory conditions are most commonly tested on NCLEX?

Asthma, COPD, pneumonia, pulmonary embolism, and pneumothorax are the highest-yield respiratory conditions on the NCLEX-RN. Know the specific assessment findings, nursing interventions, and key medications for each. ABG interpretation also appears across multiple respiratory scenarios.

What is the correct nursing action for a patient in respiratory distress?

For most respiratory emergencies: position the patient upright in high Fowler’s, administer supplemental oxygen, call the provider, and prepare for further intervention. Always address airway and breathing before any other nursing action on the NCLEX.

Why is the COPD oxygen target 88–92% instead of higher?

Patients with chronic COPD gradually adapt to elevated CO2 levels and lose the normal drive to breathe based on rising CO2. Instead, they rely on low oxygen levels (hypoxic drive) as their main stimulus to breathe. Administering too much supplemental oxygen suppresses this drive and can cause hypoventilation or respiratory failure.

What is the difference between crackles and wheezes?

Crackles (rales) are popping or bubbling sounds produced by fluid in the airways — heard in pneumonia, pulmonary edema, and heart failure. Wheezes are high-pitched, musical sounds caused by air moving through narrowed bronchi — classic in asthma and COPD exacerbations.

How do I remember ABG interpretation for nursing exams?

Start with normal values: pH 7.35–7.45, CO2 35–45, HCO3 22–26. Remember that CO2 is the respiratory value (lungs breathe it out) and HCO3 is the metabolic value (kidneys regulate it). When the pH is low and CO2 is high, it is respiratory acidosis. When the pH is low and HCO3 is low, it is metabolic acidosis. Apply this pattern to all four disorders.

Turn this guide into active review

For a printable system review, see the Respiratory Nursing Study Notes Bundle.

Self-check: close the article and write three priority findings, two nursing actions, and one safety consideration from memory. Reopen the guide only after you have attempted the recall.