| Course | NR 545 Pharmacology, Physical Assessment, and Pathophysiology Nurse Practitioner graduate placement |
|---|---|
| Week | 4 |
| Paper type | Integrated case analysis |
| Length | About 1,120 words, 2 pages |
| Format | APA 7 student paper |
| School | Chamberlain University |
| Program | MSN, nurse practitioner core |
| Updated | September 2026 |
Free sample paper for NR 545 Week 4
Integrated Case Analysis: Three Weeks of Breathlessness in a Former Smoker With Diabetes, Four Candidate Explanations Tested Against the Examination, the Natriuretic Peptide and the Chest Film
Student Name
College of Nursing, Chamberlain University
NR 545: Pharmacology, Physical Assessment, and Pathophysiology
Instructor Name
Month Day, Year
Integrated Case Analysis: Three Weeks of Breathlessness in a Former Smoker With Diabetes, Four Candidate Explanations Tested Against the Examination, the Natriuretic Peptide and the Chest Film
The Presentation
A 64-year-old retired machinist presents to primary care with three weeks of progressive breathlessness on exertion, two-pillow orthopnea, two episodes of waking breathless and evening ankle swelling, with a 3 kg weight gain. The background is 15 years of hypertension, nine years of type 2 diabetes and a smoking history of 30 pack-years that ended a decade ago. The medication list holds lisinopril (20 mg), amlodipine (10 mg) and metformin (1,000 mg morning and evening). On examination the patient is breathless on minimal exertion but comfortable seated, with blood pressure 138/84 mmHg, heart rate 92 and regular, a respiratory rate of 20 and 95% saturation breathing room air. Findings include a jugular venous pressure of about 11 cm of water with a positive abdominojugular test, a displaced apex, a third heart sound, a soft apical holosystolic murmur, fine bibasilar crackles, mild dullness at the right base, a palpable tender liver edge and 2+ pitting edema to mid-shin. Extremities are warm.
Initial tests: B-type natriuretic peptide (BNP) 890 pg/mL; serum creatinine 1.3 mg/dL (estimated filtration rate 52 mL/min/1.73 m²); potassium 4.6 mmol/L; sodium 136 mmol/L; hemoglobin 13.1 g/dL; HbA1c 7.4%; thyroid-stimulating hormone normal. Electrocardiogram: sinus rhythm at 92, left ventricular hypertrophy by voltage, no acute ST changes, Q waves absent. Chest radiograph: cardiomegaly, upper lobe venous diversion, interstitial markings at both bases and a small right pleural effusion.
Candidate Explanations
Four explanations could produce breathlessness, orthopnea and edema in this patient, and each is stated in its strongest form before being tested.
Heart failure with reduced ejection fraction. Long-standing hypertension and diabetes are both risk factors for a weakened ventricle. Congestion from raised filling pressures would explain every symptom.
Chronic obstructive pulmonary disease. Thirty pack-years is a substantial exposure. Chronic obstructive disease causes exertional breathlessness and can cause orthopnea, and cor pulmonale can cause edema and a raised jugular pressure.
Pulmonary embolism. A subacute onset over weeks is possible, and embolism can cause breathlessness and right heart strain with a raised jugular pressure.
Drug-induced edema with an unrelated cause of breathlessness. Amlodipine commonly causes ankle edema, and breathlessness could have another source, such as deconditioning or anemia.
Turning Explanations Into Examinations
Each candidate predicts something checkable, and the examination and tests were chosen to separate them.
Heart failure predicts a raised jugular pressure with a positive abdominojugular test, a third heart sound, crackles, a raised BNP and a chest film showing congestion. Chronic obstructive disease predicts wheeze or prolonged expiration, hyperinflation on the film and a BNP that is normal or only mildly raised unless right heart failure is present. Pulmonary embolism predicts tachycardia, hypoxemia out of proportion to lung findings, possibly unilateral leg swelling and a clear chest film. Drug-induced edema predicts ankle edema with a normal jugular pressure, clear lungs and no orthopnea.
The Reconciliation
Heart failure is the explanation that survives, and it survives on several independent findings.
The third heart sound carries the most weight on examination. In a systematic review of breathless patients, a third heart sound had a positive likelihood ratio of about 11 for heart failure, and pulmonary venous congestion on the chest film had a positive likelihood ratio of about 12 (Wang et al., 2005). This patient has both. The BNP of 890 pg/mL is well above the 100 pg/mL threshold that, in a large emergency department study, separated heart failure from other causes of breathlessness with good accuracy (Maisel et al., 2002). The raised jugular pressure with a positive abdominojugular test, the crackles and the enlarged liver all fit.
Chronic obstructive disease is weakened, not excluded. There is no wheeze or prolonged expiration, and the film shows congestion rather than hyperinflation. Some patients have both conditions, and spirometry after decongestion is the right test.
Pulmonary embolism is unlikely. The leg edema is bilateral and symmetric, the calves are soft, oxygen saturation is only mildly reduced and the film shows findings embolism does not produce. The findings are explained better by heart failure, and there is no feature pointing to embolism specifically.
Drug-induced edema cannot explain the raised jugular pressure, the crackles, the orthopnea or the BNP. Amlodipine may be adding to the ankle swelling, but it is not the cause of the syndrome.
Confidence is high that the patient has heart failure. The ejection fraction, confirmed by echocardiogram at 30% with a dilated ventricle and moderate functional mitral regurgitation, classifies it as heart failure with reduced ejection fraction. The cause is less certain. Hypertension is the leading candidate, but ischemic heart disease must be excluded, since diabetes can mask angina and the treatment would change.
What the Case Does Not Say
The case does not report troponin, which should be checked to exclude a recent silent infarction. It does not report urine albumin, which would help separate diabetic kidney disease from cardiorenal effects in the reduced eGFR. Nor is any coronary imaging mentioned. These gaps are noted rather than filled with invented results.
Nor does it report the patient's functional class, which I would record as New York Heart Association class III, since symptoms appear with less than ordinary activity. Iron studies are missing too; a low ferritin or transferrin saturation would add a treatable problem to the plan. Each of these gaps should be closed at the first follow-up visit.
Next Action, and What Would Overturn It
The immediate plan is to relieve congestion with a loop diuretic, start and build guideline-directed medical therapy for reduced ejection fraction and arrange evaluation for coronary disease. The patient is warm and wet, comfortable at rest with saturation of 95%, so outpatient treatment with close follow-up is reasonable if the patient can weigh daily and return within a week. Current guidelines recommend four drug classes for reduced ejection fraction, blockade of the renin-angiotensin system, one of the beta-blockers proven in trials, aldosterone antagonism and sodium-glucose cotransporter 2 inhibition (Heidenreich et al., 2022), and the drug therapy write-up will choose among them for this patient.
Three findings would send the argument back. If the patient fails to lose weight or improve on diuretic, the diagnosis or the dose needs rethinking. If spirometry after decongestion shows significant obstruction, chronic obstructive disease is a second problem needing its own treatment. If coronary evaluation finds significant disease, the cause becomes ischemic, and revascularization enters the plan.
References
Heidenreich, P. A., Bozkurt, B., Aguilar, D., Allen, L. A., Byun, J. J., Colvin, M. M., Deswal, A., Drazner, M. H., Dunlay, S. M., Evers, L. R., Fang, J. C., Fedson, S. E., Fonarow, G. C., Hayek, S. S., Hernandez, A. F., Khazanie, P., Kittleson, M. M., Lee, C. S., Link, M. S., . . . Yancy, C. W. (2022). 2022 AHA/ACC/HFSA guideline for the management of heart failure: A report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation, 145(18), e895-e1032. https://doi.org/10.1161/CIR.0000000000001063
Maisel, A. S., Krishnaswamy, P., Nowak, R. M., McCord, J., Hollander, J. E., Duc, P., Omland, T., Storrow, A. B., Abraham, W. T., Wu, A. H. B., Clopton, P., Steg, P. G., Westheim, A., Knudsen, C. W., Perez, A., Kazanegra, R., Herrmann, H. C., & McCullough, P. A. (2002). Rapid measurement of B-type natriuretic peptide in the emergency diagnosis of heart failure. New England Journal of Medicine, 347(3), 161-167. https://doi.org/10.1056/NEJMoa020233
Wang, C. S., FitzGerald, J. M., Schulzer, M., Mak, E., & Ayas, N. T. (2005). Does this dyspneic patient in the emergency department have congestive heart failure? JAMA, 294(15), 1944-1956. https://doi.org/10.1001/jama.294.15.1944
What the NR 545 Week 4 assignment asks for
In Week 4 you will analyze a case by bringing physiology and assessment together. Expect the instructions to request the presentation, a differential of possible explanations, the assessment findings and tests that distinguish them, your conclusion with reasoning and a plan. Set out the case factually, with no interpretation mixed in. List several physiological explanations and state each fairly, not as a straw man. For each, name what it predicts on examination and testing. Then show which findings removed which explanations, quoting the findings by name. State your confidence. Where the case is silent, say what you would want to know instead of inventing it. End with the next action and what result would reopen the question. Cite diagnostic accuracy evidence in APA 7.
How the NR 545 Week 4 example is put together
The analysis opens with a dense presentation: history, medications, vital signs, examination findings, laboratory values, electrocardiogram and chest film. A section states four explanations in their strongest form. Another converts each into predicted findings. The reconciliation section, the longest, shows heart failure surviving on the third heart sound, chest film congestion and a natriuretic peptide far above the 100 pg/mL threshold, citing a systematic review and an emergency department study. It weakens chronic obstructive disease, finds embolism unlikely and limits amlodipine to a contributor. Echocardiography confirms an ejection fraction of 30%. A section lists missing data, including troponin, urine albumin, functional class and iron studies. The plan names four drug classes and three findings that would reopen the argument.
NR 545 Week 4 rubric: what full points look like
Integrated case analyses are generally judged on a clear presentation, a reasonable differential, logical use of assessment and test findings to discriminate, a well-supported conclusion and an appropriate plan. Stating each alternative fairly shows honest reasoning and tends to earn credit. Converting explanations into checkable predictions shows that the examination was chosen, not performed by routine. The reconciliation paragraph, naming which finding removed which explanation, carries most of the marks. Using diagnostic accuracy data such as likelihood ratios strengthens the argument. Admitting gaps rather than inventing detail reads as mature. A plan with a stated overturning condition shows awareness that conclusions can be wrong. Consistent patient details and current references in APA 7 round out a strong analysis.
Common NR 545 Week 4 mistakes, and how to avoid them
Analyses often separate the physiology and the examination into two halves that never refer to each other. Write them as one argument. Another weakness is a differential with weak alternatives set up to lose; state each at its strongest. Some students reach the right diagnosis without showing which finding did the work. Quote findings by name in the reasoning. Avoid inventing test results the case does not give; say what you would order. Do not leave the patient's details inconsistent between sections. Report confidence honestly, including what is still uncertain, such as the cause of a confirmed condition. Close with the result that would overturn your conclusion. Tables can summarize findings, but the reasoning belongs in prose that a reader can follow step by step.
Get a NR 545 Week 4 example written to your instructions
Send the Week 4 case, the rubric and any required headings, and a custom integrated analysis is written to your instructions and returned inside 24 to 48 hours, with the first one free. Nothing is submitted for you. The example exists so you can see the joins clearly before writing your own.
More NR 545 papers and MSN samples
- NR 545 Week 1: Integration Discussion
- NR 545 Week 2: Mechanism Write-Up
- NR 545 Week 3: Focused Exam Write-Up
- NR 545 Week 5: Drug Therapy Write-up
- NR 545 Week 6: Integrated Case Analysis
- NR 545 Week 7: Case Study Analysis
- NR 545 Week 8: Comprehensive Case Paper
- NR 509 Week 1: Health History Write-up
- NR 507 Week 4: Case Analysis
NR 545 Week 4 questions, answered
How is this different from a care plan?
A care plan reports decisions; this document defends them. The grading weight sits in the middle sections, where the physiological account is tested against the findings, and a plan written without that reasoning attached will read as clinically sensible and score poorly. The plan matters here as the conclusion of an argument rather than as the assignment itself.
Do I need a final diagnosis?
Not always, and forcing one is a common way to lose credit. Many cases this week are built so the evidence supports a shortlist rather than a single answer. The strong document says how far the reasoning reaches, names what would settle the remaining question, and commits to a plan appropriate to that level of certainty.
How many sources should the analysis carry?
Follow the count your section publishes, and put them where the specific claims are. Two references supporting the physiological account and one supporting the therapeutic decision usually do more work than a longer list attached to background statements. Sources need to be recent enough that a grader checking the therapy against current practice finds them consistent.
Where can I find a free NR 545 Week 4 sample paper?
The four-explanation breathlessness analysis is shown above as the NR 545 Week 4 sample, readable from start to finish. If you have a different presenting complaint, describe the case to us and an integrated analysis can be written.
How many explanations should the NR 545 Week 4 analysis test?
Enough to cover the reasonable causes, usually three to five, each stated fairly. The sample tests heart failure, obstructive lung disease, pulmonary embolism and drug-induced edema.