Risk Factors and Recognition

Virchow's triad explains PE risk: venous stasis (immobility, long flights, post-surgical bed rest), hypercoagulability (cancer, pregnancy, oral contraceptives, clotting disorders), and endothelial injury (trauma, surgery, IV catheters). Classic presentation includes sudden-onset dyspnea, pleuritic chest pain, tachycardia, tachypnea, and anxiety or a sense of impending doom; hemoptysis may occur with pulmonary infarction. A large PE can cause sudden hypotension, jugular venous distension, and signs of right heart strain progressing to obstructive shock and cardiac arrest. The NCLEX often presents a post-op client with sudden dyspnea and chest pain as the classic PE scenario, testing whether you recognize it immediately rather than attributing it to anxiety.

Diagnostics and Immediate Actions

D-dimer is a sensitive but non-specific screening test; an elevated level supports further workup but doesn't confirm PE, while a normal D-dimer largely rules it out in low-risk clients. CT pulmonary angiography is the gold standard for confirming diagnosis. Immediate nursing actions when PE is suspected include applying supplemental oxygen, placing the client in high-Fowler's position, obtaining vital signs and oxygen saturation, maintaining IV access, and notifying the provider immediately without delay for confirmatory testing if the client is unstable. Elevated troponin or BNP can indicate right ventricular strain, correlating with a more severe PE and higher mortality risk.

Treatment and Prevention

Anticoagulation with heparin or DOACs is first-line treatment to prevent clot extension and new clot formation, while thrombolytics are reserved for massive PE with hemodynamic instability. An inferior vena cava filter may be placed for clients who cannot take anticoagulants or have recurrent PE despite therapy. Prevention is heavily tested: encourage early ambulation post-surgery, apply sequential compression devices, administer prophylactic anticoagulants like subcutaneous heparin as ordered, and teach leg exercises for immobile clients. Recognizing DVT symptoms (unilateral leg swelling, warmth, and pain) early and preventing dislodgement by avoiding massaging the affected leg helps prevent progression to PE.