# A nurse is assessing a patient with end-stage renal disease who has developed uremic syndrome. Which assessment finding would be the most critical indicator requiring immediate intervention?

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## 문제

A nurse is assessing a patient with end-stage renal disease who has developed uremic syndrome. Which assessment finding would be the most critical indicator requiring immediate intervention?

## 보기

1. Serum creatinine level of 8.5 mg/dL
2. Pericardial friction rub with chest pain **✔ 정답**
3. Blood urea nitrogen (BUN) of 150 mg/dL
4. Uremic frost on the skin surface

**정답: 2**

## 해설

Pericardial friction rub indicates uremic pericarditis, a life-threatening complication requiring immediate dialysis to prevent cardiac tamponade. Other findings like elevated BUN or creatinine are common in uremic syndrome but less urgent.

## 심화 해설

Understanding Uremic Pericarditis as a Critical Complication

In a patient with end-stage renal disease (ESRD) developing uremic syndrome, the assessment finding that demands the most immediate intervention is a pericardial friction rub with chest pain. This combination is the classic clinical presentation of uremic pericarditis, an inflammatory condition of the pericardium that carries a direct risk of progressing to life-threatening cardiac tamponade. While the other listed findings are serious and indicative of severe uremia, they do not represent the same level of imminent hemodynamic threat. The underlying pathophysiology involves the accumulation of uremic toxins due to inadequate clearance, which causes chemical irritation and inflammation of the pericardial layers. This inflammation can rapidly lead to the exudation of fluid into the pericardial sac, increasing intrapericardial pressure, compressing the heart chambers, and severely impairing cardiac filling and output [1,3].

Differentiating the Priority: Why Not the Other Options?

The correct clinical judgment hinges on recognizing the immediate danger of hemodynamic collapse. A serum creatinine level of 8.5 mg/dL and a BUN of 150 mg/dL are profoundly abnormal lab values that confirm the severity of renal failure and uremia, but they represent a chronic, cumulative state. They indicate the underlying disease process but do not, by themselves, signal an acute, immediately reversible life threat in the same way. Uremic frost, a dermatological manifestation of crystallized urea on the skin from extremely high BUN levels, is a striking visual sign of advanced uremia but is not an immediate hemodynamic emergency. In contrast, the presence of a pericardial friction rub with chest pain is a sentinel physical exam finding that directly points to active pericardial inflammation, which is the precursor to a pericardial effusion and potential tamponade [3,4].

Clinical Progression and the Rationale for Immediate Intervention

The clinical significance of this finding is its potential for rapid deterioration. As uremic pericarditis progresses, the inflamed pericardium can produce a significant effusion. The danger lies in the development of cardiac tamponade, a state where the accumulating fluid under pressure restricts diastolic filling of the heart. This leads to a cascade of critical findings: muffled heart sounds, hypotension, and jugular venous distension (Beck's triad), culminating in obstructive shock [1,4]. The provided evidence underscores that uremic pericarditis is associated with substantial morbidity and potential mortality precisely because of this risk [3]. Therefore, the nurse's immediate intervention upon detecting a pericardial friction rub and chest pain is to recognize this as a potential precursor to tamponade, notify the provider emergently, and prepare for urgent interventions. The definitive first-line management for this condition is often the intensification of hemodialysis (HD), which directly addresses the root cause by removing the inflammatory uremic toxins . In cases where tamponade is already present, urgent pericardiocentesis becomes necessary to relieve the pressure on the heart [4].References (research sources)

- [3]Understanding Hemodialysis-Associated Pericarditis: Causes, Symptoms, and Management Strategies.Research articlePeride I, Nechita AM, Dumitrache B, Tiglis M, Neagu TP, Checherita IA, Niculae A. (2025) · DOI: 10.3390/jcm14175944

- [4]Uremic Pericarditis with Cardiac Tamponade in a Patient on Hemodialysis.Research articleJaved N, Molina M, Nasr R, Diaz-Fuentes G. (2023) · DOI: 10.1155/2023/5099005

## 임상 시나리오

Uremic Pericarditis: Emergency RecognitionPrioritizing the Friction Rub in ESRD
A pericardial friction rub with chest pain in an ESRD patient is the hallmark of uremic pericarditis. This is a life-threatening emergency because it can rapidly progress to cardiac tamponade, causing hemodynamic collapse.

The immediate priority intervention is to notify the provider and prepare for emergent hemodialysis. Dialysis is the definitive treatment to remove the uremic toxins causing the inflammation. Monitor closely for signs of tamponade: Beck's triad (hypotension, muffled heart sounds, jugular venous distension) and pulsus paradoxus.

CautionDo not delay treatment for lab values like a BUN of 150 mg/dL or creatinine of 8.5 mg/dL. While critically elevated, they indicate a chronic state. The friction rub signals an acute, active inflammatory process that can decompensate within hours.

## 핵심 개념

- **Uremic Pericarditis** — Inflammation of the pericardium caused by uremic toxin accumulation in advanced renal failure, presenting with chest pain and a friction rub.
- **Cardiac Tamponade** — A life-threatening condition where fluid in the pericardial sac compresses the heart, impairing ventricular filling and reducing cardiac output.
- **Pericardial Friction Rub** — A high-pitched, scratchy heart sound heard on auscultation, indicative of pericardial inflammation.

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