A 32-year-old postpartum client on her third day after vaginal delivery suddenly develops shortness of breath, chest pain, and anxiety. Her vital signs are: BP 90/60 mmHg, HR 120 bpm, RR 28/min, O2 sat 88% on room air. Which assessment finding would be MOST indicative of pulmonary embolism in this client?
1Bilateral crackles in lung bases with productive cough
2Unilateral leg swelling with positive Homan's sign✓ 정답
3Fever of 101.5°F (38.6°C) with purulent sputum
4Symmetrical chest expansion with clear breath sounds
해설
Unilateral leg swelling with positive Homan's sign indicates DVT, the primary risk for PE in postpartum clients. Other findings suggest pneumonia or normal status, not PE.
The scenario describes a classic high-risk presentation for pulmonary embolism (PE) in a postpartum client. The combination of sudden-onset shortness of breath, chest pain, anxiety, tachypnea (RR 28/min), tachycardia (HR 120 bpm), hypotension (BP 90/60 mmHg), and significant hypoxemia (O2 sat 88%) points toward a massive or high-risk PE, which is a leading cause of maternal mortality in the postpartum period [1]. In this context, identifying the most indicative assessment finding requires linking the pathophysiology of venous thromboembolism (VTE) to its clinical signs.
Analysis of the Correct Answer (Option 2)
Unilateral leg swelling with a positive Homan's sign is the most indicative finding. The underlying pathophysiology of PE in this population almost always begins with a deep vein thrombosis (DVT), typically originating in the lower extremities. Postpartum women are at a significantly increased risk for VTE due to Virchow's triad: venous stasis, hypercoagulability, and endothelial injury sustained during delivery [2]. A thrombus that forms in the deep veins of the leg can dislodge and travel to the pulmonary arteries, causing the life-threatening obstruction you see in the client's vital signs. Therefore, clinical evidence of a DVT—such as unilateral leg swelling, pain, warmth, or a positive Homan's sign—provides the strongest bedside clue that the source of the embolus is a venous thrombus, making PE the most likely diagnosis. While Homan's sign has limited sensitivity and specificity on its own, in the presence of a high pre-test probability presentation like this, it reinforces the clinical suspicion for VTE.
Analysis of Incorrect Answers
Option 1: Bilateral crackles in lung bases with productive cough is a hallmark of cardiogenic pulmonary edema or pneumonia, not an acute PE. While a massive PE can eventually cause right ventricular failure and pulmonary congestion, the sudden onset and the presence of clear risk factors for VTE make a primary cardiac or infectious etiology less likely. The finding is bilateral and associated with airway secretions, which does not localize to a thromboembolic source.
Option 3: Fever of 101.5°F (38.6°C) with purulent sputum is highly suggestive of an infectious process like pneumonia or endometritis, which can be a concern in a postpartum client. While PE can sometimes cause a low-grade fever, a high fever with purulent sputum points away from a sterile thromboembolic event and toward an infection. This finding does not indicate a VTE source.
Option 4: Symmetrical chest expansion with clear breath sounds is a normal respiratory assessment. In a client with significant hypoxemia and respiratory distress, this finding might be seen in conditions that do not involve airway obstruction or consolidation, such as PE, but it is a non-specific finding. It does not provide a positive indicator that the problem is a PE originating from a venous thrombus. The question asks for the finding most indicative of PE, which requires a positive sign of VTE, not just the absence of other lung pathology.
Pathophysiology and Risk Context
The postpartum period represents a state of profound hypercoagulability. Research indicates that standard D-dimer cut-offs, a biomarker for fibrin degradation, are not applicable in this population because D-dimer levels are physiologically elevated during pregnancy and the immediate postpartum period, even in the absence of an acute thromboembolic event . This underscores why clinical assessment for a source DVT is paramount. A massive PE, as described in the case report, can lead to a sudden reduction in cardiac output and transient cerebral hypoperfusion, which may manifest as syncope or even cardiac arrest [1]. The hypotension and tachycardia in this client are signs of right ventricular strain and obstructive shock, a high-risk feature that demands immediate recognition of the likely embolic source. The systematic review confirms that postpartum women are at an increased risk of VTE, and clinical factors remain the cornerstone of initial risk assessment, which includes looking for signs of DVT [2].
References (research sources)
[1]
Convulsive Syncope as the Initial Presentation of Massive Postpartum Pulmonary Embolism Leading to Cardiac Arrest: A Case Report.Case reportAlnuaimi KH, Shaikh AA. (2026) · DOI: 10.7759/cureus.106883
[2]
Diagnostic accuracy of D-dimer for predicting postpartum venous thromboembolism: a systematic review and meta-analysis.Meta-analysis/systematic reviewJin X, Dong Z, Zhang L, Zheng W, Zhu Q. (2026) · DOI: 10.1186/s12959-026-00841-0
In a postpartum patient with sudden-onset dyspnea and hypoxemia, the most specific bedside finding pointing to pulmonary embolism (PE) is evidence of a deep vein thrombosis (DVT). The majority of PEs originate from thrombi in the lower extremities. Always assess for unilateral leg swelling, erythema, warmth, and a positive Homan's sign, though their absence does not exclude PE.
Pathophysiology Link
The postpartum period fulfills Virchow's triad: venous stasis from reduced mobility and uterine pressure, hypercoagulability from hormonal changes, and potential endothelial injury during delivery. A DVT forms, dislodges, and embolizes to the pulmonary vasculature, causing ventilation-perfusion mismatch and acute right ventricular strain.
Focused Assessment Protocol
Vital Signs: Monitor for tachypnea, tachycardia, hypotension, and dropping O2 saturation as signs of massive PE.
Respiratory: Auscultate lung fields. Clear breath sounds with severe dyspnea is a classic, paradoxical finding in PE.
Cardiovascular: Assess for signs of right heart strain (JVD, loud P2) and hemodynamic instability.
Extremities: Measure calf circumference bilaterally. Inspect and palpate for unilateral edema, pain, warmth, and perform Homan's sign assessment.
Nursing Priority Actions
Apply high-flow oxygen to maintain SpO2 above 92%.
Elevate the head of the bed to ease respiratory effort.
Notify the rapid response team or provider immediately with a concise SBAR report highlighting the DVT finding and vital sign instability.
Prepare for diagnostic tests (CTPA or V/Q scan) and anticipate anticoagulation therapy.
Maintain strict bed rest to prevent further embolization from the suspected DVT.
Homan's Sign — A clinical sign for deep vein thrombosis where passive dorsiflexion of the foot elicits pain in the calf, though its absence does not rule out DVT.
Virchow's Triad — Three factors contributing to thrombosis: venous stasis, hypercoagulability, and endothelial injury, all of which are present in the postpartum state.
Deep Vein Thrombosis (DVT) — A blood clot that forms in a deep vein, usually in the legs, which can dislodge and travel to the lungs causing a pulmonary embolism.
Pulmonary Embolism (PE) — A blockage in one of the pulmonary arteries in the lungs, most often caused by blood clots that travel from the legs or other parts of the body.