Acute respiratory emergencies
NCLEX airway map: failure cues, PE vs pneumothorax vs obstruction, oxygen and positioning priorities, and when to escalate.
By the Clesial Editorial Team · Reviewed by Clesial Editorial Team, Clinical Content Review
Updated August 4, 2026 · 9 min read
Respiratory emergencies are ABC items. Protect the airway and gas exchange first, then match the syndrome to the one move that buys time.
Failure cues that raise priority
| Cue | Why it matters | First instinct |
|---|---|---|
| SpO₂ falling / cyanosis | Hypoxemic failure | Oxygen as ordered; upright if safe; escalate |
| Rising PaCO₂ / somnolence | Ventilatory failure | Support ventilation; call for help |
| Use of accessory muscles / exhaustion | Impending arrest | Do not leave; prepare advanced support |
| Stridor / silent obstruction | Upper airway threat | Airway intervention per protocol |
High-yield syndromes
| Pattern | Classic cues | Do not miss |
|---|---|---|
| Pulmonary embolism | Sudden dyspnea, pleuritic pain, hypoxia; risk: DVT, immobility, surgery | Oxygen + rapid notify; anticipate anticoag / further testing |
| Pneumothorax / tension | Unilateral ↓ breath sounds, chest pain; tension adds tracheal shift + shock | Emergency provider path; high Fowler if ordered; no delay for nonessentials |
| Severe asthma / bronchospasm | Wheeze, prolonged expiration; late: silent chest, exhaustion | Bronchodilators / steroids per orders; escalate silent chest |
| Aspiration / obstruction | Cough, cyanosis, inability to speak if complete | Choking algorithm; NPO when aspiration risk high |
Safety
Tracheal deviation with instability is a now problem. Stay with the client, support oxygen, and get emergency help — do not prioritize a full set of “nice to know” questions.
Oxygen and positioning (exam habits)
- Upright / high Fowler for most dyspneic clients unless spinal or other contraindications.
- Titrate oxygen to ordered targets; COPD stems still get oxygen when hypoxic — avoid the myth of “never give O₂.”
- If the client cannot protect the airway, suction and advanced airway readiness beat oral teaching.
How to reason under time pressure
- Is the airway open and is air moving?
- Is oxygenation/ventilation failing right now?
- Match sudden unilateral or embolic cues to PE vs pneumothorax.
- Escalate exhaustion, silent chest, or tracheal deviation immediately.
Must know
- Airway and breathing beat almost every other task when the client is failing gas exchange.
- Rising CO₂ + falling LOC = ventilatory failure risk — support breathing, do not just raise the nasal cannula and walk away.
- PE pattern: sudden dyspnea, chest pain, hypoxia — oxygen, rapid response / provider, anticipate anticoagulation or further workup.
- Tension pneumothorax: tracheal deviation, unilateral absent breath sounds, hypotension — emergency decompression path; do not delay for comfort measures alone.
- Complete airway obstruction: intervene for choking; partial with good air movement — encourage cough and monitor.
- Position for dyspnea: upright / high Fowler when not contraindicated; prepare for advanced airway if exhaustion or silent chest appears.
Memory hooks
- Oxygen first, then the cause: Stabilize oxygenation and ventilation, then chase PE, pneumothorax, aspiration, or asthma path with the stem cues.
- Silent chest is not quiet progress: In severe asthma/bronchospasm, loss of wheeze with exhaustion means airflow is collapsing — escalate, do not celebrate “less wheeze.”
How it's tested
Stems show sudden dyspnea, unilateral chest findings, or a choking client and ask for the first action. Distractors start detailed teaching, leave a hypoxic client to get a full history, or treat tracheal deviation as a routine assessment finding.