NCLEX-RN® NGN Case Study: Post-Op Adult with Sudden Dyspnea and Possible Pulmonary Embolism

An NGN case study on a 52-year-old post-op client with sudden pleuritic chest pain and a falling SpO2 — cues to highlight, how to rank the differentials, and the safe order of nursing actions.

Sudden shortness of breath that doesn't fit any easy box

A 52-year-old returns to the medical ward two days after laparoscopic gynaecologic surgery and tells the night nurse, "I just felt this stab in my chest, and I can't catch my breath." The client is anxious, splinting the right side, and breathing fast. SpO₂ has drifted from 96% earlier in the shift to 91% on room air. Heart rate is 118 and regular. Blood pressure is 102/64 — slightly low for this client.

The right calf is mildly tender to palpation. The client refused early ambulation yesterday because of nausea. There is no fever, no productive cough, and the lungs sound clear bilaterally. The client says, "Maybe I'm just panicking."

That is the entire opening of this NGN case study. Nothing on screen says "PE". The case asks you to behave like the post-op RN who refuses to write off sudden dyspnoea in a high-risk client even when the bedside picture is not dramatic.

What this case is testing

The case is built around acute pulmonary embolism because it forces a full pass through the NCSBN Clinical Judgment Measurement Model on a quietly catastrophic vascular emergency:

  • Recognize cues that change "post-op anxiety" to "PE possible" — risk factors, the calf finding, sudden pleuritic pain, the trend in oxygen saturation, and the discrepancy between clear lungs and falling SpO₂.
  • Analyze cues the way a med-surg nurse would — knowing why a normal chest exam does not rule out PE and how a Wells-style risk picture changes the next step.
  • Prioritize hypotheses when more than one differential could explain the picture — PE, pneumonia, post-op atelectasis, pneumothorax, anxiety, acute coronary syndrome.
  • Generate solutions that match the urgency of the most dangerous possibility — supplemental oxygen criteria, IV access, anticoagulation timing, imaging route, and rapid-response activation.
  • Take action in the right order — the case will test whether you know which step cannot wait and which intervention requires a provider order before the nurse may proceed.
  • Evaluate outcomes after the first interventions using new vitals, a fresh oxygen-requirement check, the client's pain score, and any new symptoms.

Underneath the case you will touch several Client Needs categories at once: Safe and Effective Care Environment, Physiological Adaptation, Pharmacology and Parenteral Therapies (heparin and DOAC reasoning), Reduction of Risk Potential, and Health Promotion and Maintenance for the prevention teaching that closes the case.

Who this case is good for

This is a senior-level NCLEX-RN® case study. It is a strong fit for:

  • Senior nursing students preparing for NCLEX-RN® who have completed a med-surg or post-op rotation.
  • Recent graduates working through NGN cases in the final stretch of a 30-, 60-, or 90-day NCLEX-RN® study plan.
  • Internationally educated nurses preparing for NCLEX-RN® who want practice with US post-op surveillance rhythms and anticoagulation reasoning.
  • Anyone who memorised the Virchow triad but still hesitates when "could be anxiety" is sitting at the top of the differential.

It is not the right first NGN case for a student who has only done multiple-choice questions so far. If that's you, start with the in-app NGN tutorial the first time you open any case — it walks the six clinical-judgment steps in plain language.

What you will work through, step by step

Inside the case you will move through six linked sub-items. Each ties to a single step in the CJMM clinical-judgment cycle and unlocks the next.

  • The opening sub-item asks you to highlight the cues that change the story from "post-op anxiety" to "PE possible". Picking too many cues is as wrong as picking too few.
  • The analyse sub-item asks you to match cues to a probable physiological process and rate the pre-test probability the way the literature does.
  • A prioritisation sub-item asks you to rank the differentials by how dangerous they would be if missed, not by what feels most likely.
  • An action sub-item asks for the single first nursing action. Two of the choices look almost identical — separating them is the entire point of the item.
  • A handoff sub-item asks you to assemble a rapid-response report to the on-call provider using building blocks instead of free text.
  • The closing sub-item asks you to evaluate the response after the first round of interventions using fresh vitals, the imaging plan, and the client's own words.

At the end you will see your overall score, sub-item by sub-item feedback, and a short reflection prompt that feeds your Mistake DNA inside RN Clarity.

Why this case shows up in NCLEX-RN® prep so often

PE is one of the most-tested presentations on the current NCLEX-RN® test plan because it rewards exactly the reasoning the exam was designed to measure — risk-factor pattern recognition, a time-sensitive medication plan, and a single ordered series of nursing actions where the calmest-looking client can deteriorate fastest.

If you can think your way through this case calmly, you will have practised the same clinical-reasoning loop NCLEX-RN® test writers reward, on a presentation you are likely to see again very early in your nursing career.

Try the full case

There is no spoiler here on purpose. An NGN case is about the reasoning you do while the screen is in front of you, not the answer key afterward. The case is open to free-preview members and full subscribers inside the RN Clarity NGN bank.

Try this case →

See also:

NCLEX-RN® Hub: Clinical Judgment Guide · NGN Case Studies Hub

Practice on RN Clarity: NGN Case Studies · Question Bank · Drug Cards