Case Study — Respiratory
COPD Exacerbation NGN Case Study
A Next Gen NCLEX-style unfolding case. Read each step, commit to your own answer — out loud or on paper — and only then reveal ours. The six steps mirror the NCSBN Clinical Judgment Measurement Model exactly as the exam tests it.
15 min activity · Respiratory
Educational use only. This case is a learning exercise with simplified values, not a treatment protocol — real exacerbation care follows provider orders, your facility’s protocols, and the patient’s individualized oxygen targets. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
The Scenario
1400, medical floor admission: Mr. Okafor, 71, with severe COPD (on home oxygen 2 L/min) is admitted after a week of worsening cough with thicker, yellower sputum following a “head cold.” History: 50 pack-years (quit 5 years ago), two exacerbations last year, hypertension.
Admission Assessment
- HR 104 · BP 152/88 · RR 28 shallow · SpO₂ 84% on his home 2L · Temp 37.6°C
- Speaking in 2–3 word phrases; sitting upright, leaning on the bedside table (tripod)
- Pursed-lip breathing, accessory muscle use; prolonged expiratory phase with diffuse expiratory wheezes
- Barrel chest; diminished breath sounds at the bases
- Alert and anxious — “I can’t… get… air”
Step 1 — Recognize Cues
Which findings are most relevant — and which matter most right now? List the cues you would flag before revealing.
▸Reveal answer
Most concerning cues: SpO₂ 84% on his usual oxygen, RR 28 with accessory muscles and tripod positioning, 2–3 word speech (a bedside severity meter), and anxiety with air hunger. These say the work of breathing is outrunning him.
Cues that explain why: a week of purulent sputum after a URI — the classic infectious exacerbation trigger; wheezes and prolonged expiration showing active bronchospasm and air trapping.
Expected-for-him findings: barrel chest, pursed lips, diminished bases — chronic COPD architecture, context rather than alarm. Knowing a COPD patient’s baseline is half the assessment.
Step 2 — Analyze Cues
What conditions could explain this picture? An ABG is drawn on arrival: pH 7.32 · PaCO₂ 58 · PaO₂ 54 · HCO₃ 30. Interpret it and connect the cues before revealing.
▸Reveal answer
Infectious COPD exacerbation (most supported): URI prodrome, sputum change, wheeze, and hypoxemia. The ABG shows acute-on-chronic respiratory acidosis — the elevated HCO₃ is his kidneys’ chronic compensation, but the pH of 7.32 says CO₂ is now rising faster than compensation can cover. He is partially compensated and tiring.
Pneumonia: possible companion — low-grade temp, purulent sputum; chest X-ray will sort it. Treated alongside either way.
Heart failure exacerbation: shares dyspnea, but the wheeze-and-sputum picture, absence of new edema/orthopnea history, and his clear-but-diminished bases point away; BNP can help.
Pulmonary embolism: worth remembering in any COPD patient who deteriorates without sputum change — not this presentation, but it stays on the mental list.
Step 3 — Prioritize Hypotheses
Rank what can kill him, and in what order. Where does the classic worry about “giving a COPD patient too much oxygen” rank?
▸Reveal answer
1. Hypoxemia — PaO₂ 54 is the immediate life threat. Hypoxia kills in minutes; hypercapnia in hours. He needs more oxygen, titrated, not withheld.
2. Progressive ventilatory failure — the rising CO₂ with acidemia and visible fatigue is the trajectory to watch; it’s what BiPAP exists for.
3. The untreated trigger — bronchospasm and infection keep the spiral going until bronchodilators, steroids, and antibiotics break it.
The balance: the answer to oxygen-induced CO₂ retention is a target, not deprivation — titrate SpO₂ to 88–92% for CO₂-retaining COPD patients, reassess, and never leave a hypoxic patient under-oxygenated out of fear.
Step 4 — Generate Solutions
What should happen in the next hour? Draft your action list — include what you anticipate the provider will order.
▸Reveal answer
Immediate nursing actions: titrate oxygen toward SpO₂ 88–92% (a Venturi mask gives precise FiO₂ if nasal cannula isn’t enough), keep him upright, stay calm and coach pursed-lip breathing — anxiety feeds the spiral; continuous SpO₂ monitoring and frequent reassessment of work of breathing and mental status.
Anticipated orders: nebulized short-acting bronchodilators (albuterol + ipratropium), systemic corticosteroids, antibiotics for the purulent exacerbation, chest X-ray, sputum culture, repeat ABG after interventions.
Have ready in your head: the BiPAP threshold — worsening acidemia, rising CO₂, or fatigue despite treatment — and the escalation call. Noninvasive ventilation is the proven mortality-reducer in hypercapnic exacerbations.
Step 5 — Take Action
1640: you return from another room. A family member, worried, has cranked the oxygen flowmeter to 6 L/min — “his numbers looked low.” SpO₂ now reads 95%, but Mr. Okafor is markedly drowsier, answering in single words. What do you do?
▸Reveal answer
Recognize CO₂ narcosis in progress: the saturation looks better while the patient looks worse — new somnolence in a CO₂ retainer on escalated oxygen is rising CO₂ until proven otherwise. Assess immediately, get a stat ABG, and notify the provider/rapid response. The repeat gas: pH 7.24 · PaCO₂ 74 · PaO₂ 88.
Titrate down toward the 88–92% target — do not abruptly remove oxygen. Snatching the O₂ away crashes a now-CO₂-blunted patient into severe hypoxemia. Dial down, keep him stimulated and upright, and prepare for BiPAP, which treats both problems: it blows off CO₂ and maintains oxygenation.
Close the loop: a no-blame word with the family about why his oxygen is set where it is, and a flow-meter check added to your rounding. Drowsiness that progresses despite BiPAP is an intubation conversation — know where his code status and goals stand.
Step 6 — Evaluate Outcomes
2000, on BiPAP for two hours: RR 20, SpO₂ 91%, alert and conversational between mask breaks; repeat ABG pH 7.33 · PaCO₂ 60 · PaO₂ 68. Which findings show the interventions are working, and what still needs watching?
▸Reveal answer
Improving: mental status restored (the most honest CO₂ monitor), pH climbing back toward his compensated baseline, CO₂ falling, respiratory rate and work of breathing settling at his target saturation.
Still watching: BiPAP tolerance and skin under the mask, ABG trend (his “normal” CO₂ runs high — chase his baseline, not the textbook’s), sputum and temperature for the infection’s course, intake (he can’t eat on BiPAP — plan breaks), and steroid side effects (glucose, especially).
Before discharge: inhaler technique check (most are used wrong), the home oxygen conversation, vaccination status (influenza, pneumococcal, COVID), an exacerbation action plan — and confirmation that everyone at home knows the flowmeter isn’t a volume knob.
Debrief — The Pattern to Keep
- ✦Speech length is a severity meter: full sentences → phrases → words → silence.
- ✦Hypoxia kills first — COPD patients get the oxygen they need, titrated to 88–92%, never withheld out of CO₂ fear.
- ✦A better SpO₂ with a drowsier patient = rising CO₂. The mental status is the monitor; get the ABG.
- ✦Never abruptly remove oxygen from a CO₂-narcotic patient — titrate down and move to BiPAP.
- ✦Interpret ABGs against the patient's chronic baseline: high HCO₃ means the kidneys have been compensating for years.