Case Study Undergraduate 449 words

Acute Pulmonary Embolism After Total Knee Replacement

~3 min read 4 sections Medicine

Abstract

This paper presents a clinical case analysis of a 65-year-old patient exhibiting shortness of breath, pleuritic chest pain, and palpitations following a total knee replacement surgery. Drawing on evidence from multiple sources, the paper identifies acute pulmonary embolism (PE) as the most likely diagnosis. It examines the pathophysiology of PE as a venous thromboembolism, discusses postoperative immobility as a key contributing factor, and reviews demographic risk factors including age and race. The analysis references established clinical literature to support each diagnostic conclusion, offering a concise but evidence-grounded exploration of this common and potentially fatal postoperative complication.

Key Takeaways

Introduction and Clinical Presentation: Patient symptoms and postoperative complication context
Diagnosis: Acute Pulmonary Embolism: PE identified as most likely diagnosis with evidence
Pathophysiology and Postoperative Risk Factors: PE mechanism and surgical immobility as causes
Demographic and Racial Considerations in PE: Racial disparities in PE incidence and mortality

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What makes this paper effective

The paper integrates multiple peer-reviewed and clinical sources to build a coherent diagnostic argument, grounding each claim in cited evidence rather than assertion alone.
It connects patient-specific details — age, recent surgery, likely bed rest — directly to established clinical risk factors, demonstrating applied clinical reasoning.
The inclusion of demographic context (racial disparities in PE incidence and mortality) shows awareness of population-level factors that inform clinical practice.

Key academic technique demonstrated

This paper demonstrates evidence-based clinical reasoning: the student matches a patient's presenting symptoms against diagnostic criteria sourced from the literature, then explains the underlying pathophysiology and epidemiology that make the diagnosis plausible. This technique — symptom-to-diagnosis-to-mechanism — is a core skill in health sciences writing.

Structure breakdown

The paper opens by situating the case within the broader context of postoperative pulmonary complications, then presents the patient's symptoms and arrives at a diagnosis. It proceeds to explain PE's pathophysiology and the specific postoperative mechanism at play, before closing with a discussion of demographic risk factors. References follow APA format throughout.

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Essay 449 words

Introduction and Clinical Presentation

Lumb (2017) points out that postoperative pulmonary complications (PPCs) are rather common and are associated with increased mortality among patients. In the present case, the patient presents with shortness of breath, pleuritic chest pain, and palpitations. The most likely diagnosis in this case is acute pulmonary embolism. As Ouellette (2020) notes, "the classic presentation of PE is the abrupt onset of pleuritic chest pain, shortness of breath, and hypoxia." It is also worth noting that, according to Blann (2015), clinical data indicates that a vast majority of pulmonary embolism cases are reported in the 60–70 year age group. The patient in question is 65 years old.

Diagnosis: Acute Pulmonary Embolism

Pulmonary embolism can essentially be understood as a venous thromboembolism that travels from the veins of the legs to the lungs. One of the key symptoms that a patient presents following the blockage of a pulmonary artery by a clot is shortness of breath, which is typically accompanied by pleuritic chest pain. The combination of these symptoms, together with the patient's age and recent surgical history, strongly supports a diagnosis of acute PE.

Pathophysiology and Postoperative Risk Factors

According to Stein (2016), one leading cause of PE is surgery. In the scenario presented in this case, the condition may have occurred as a consequence of prolonged immobility due to bed rest following surgery. The patient underwent a total knee replacement eight days prior to presentation. It is likely that he was confined to bed following the procedure. Prolonged immobility is a well-established risk factor for the development of deep vein thrombosis, which in turn can give rise to pulmonary embolism if a clot dislodges and travels to the pulmonary vasculature.

1 Section Hidden · 70 words

Demographic and Racial Considerations in PE70 words

It is important to note that the incidence of pulmonary embolism is not uniform across racial groups. According to Merli, Awsare, and Baram (2020), "the incidence of pulmonary…

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References

Blann, A. (2015). Deep vein thrombosis and pulmonary embolism: A guide for practitioners. M&K Update.

Lumb, M. A. (2017). Postoperative pulmonary complications. British Journal of Anaesthesia, 118(3), 317–334.

Merli, G. J., Awsare, B., & Baram, M. (2020). Pulmonary embolism in the ICU. Elsevier Health Sciences.

Ouellette, D. R. (2020). Does pulmonary embolism (PE) have a racial predilection? Medscape.

Stein, P. D. (2016). Pulmonary embolism. John Wiley & Sons.

Key Concepts in This Paper

Pulmonary Embolism Postoperative Complications Venous Thromboembolism Pleuritic Chest Pain Deep Vein Thrombosis Surgical Risk Immobility Racial Disparities PE Diagnosis Knee Replacement