DVT vs Pulmonary Embolism: Clot in the Leg vs Clot in the Lung
A client with calf swelling yesterday now has sudden dyspnea and chest pain today — that DVT just migrated to the lungs. Mixing up leg-clot findings with lung-clot findings on the NCLEX means you miss the respiratory emergency and choose the wrong priority action.
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- Deep leg veins (femoral, popliteal)
- Gradual onset over hours to days
- Clot lodges in pulmonary arteries
- Sudden onset — seconds to minutes
- ★Unilateral leg edema, warmth, erythema
- Palpable cord
- Calf pain or tenderness
- ★Sudden dyspnea + pleuritic chest pain
- Tachypnea, tachycardia, anxiety/doom
- Hemoptysis
- Compression duplex ultrasound
- Lungs clear, SpO₂ normal, stable VS
- ↑ D-dimer
- CT pulmonary angiography (CTPA)
- ↑ D-dimer
- ★Hypoxemia SpO₂ <94%
- Elevate extremity
- Ambulate once anticoagulated
- Never massage the affected leg
- High-flow O₂
- High Fowler position
- Prepare for possible code
- Anticoagulation: heparin → DOAC/warfarin
- Often treated outpatient
- Massive PE: tPA or embolectomy
- Anticoagulation: heparin → DOAC/warfarin
- Early ambulation, SCDs
- Prophylactic enoxaparin
- Report new dyspnea or chest pain
- Early ambulation, SCDs
- IVC filter if can't anticoagulate
- Prophylactic enoxaparin
- ★DVT + new dyspnea → suspect PE
- Hypotension + RV strain = massive PE
- Embolization to lungs (PE)
- Post-thrombotic syndrome
- Cardiac arrest (massive PE)
- Right heart failure
DVT
- Deep leg veins (femoral, popliteal)
- Gradual onset over hours to days
Pulmonary Embolism
- Clot lodges in pulmonary arteries
- Sudden onset — seconds to minutes
DVT
- ★Unilateral leg edema, warmth, erythema
- Palpable cord
- Calf pain or tenderness
Pulmonary Embolism
- ★Sudden dyspnea + pleuritic chest pain
- Tachypnea, tachycardia, anxiety/doom
- Hemoptysis
DVT
- Compression duplex ultrasound
- Lungs clear, SpO₂ normal, stable VS
- ↑ D-dimer
Pulmonary Embolism
- CT pulmonary angiography (CTPA)
- ↑ D-dimer
- ★Hypoxemia SpO₂ <94%
DVT
- Elevate extremity
- Ambulate once anticoagulated
- Never massage the affected leg
Pulmonary Embolism
- High-flow O₂
- High Fowler position
- Prepare for possible code
DVT
- Anticoagulation: heparin → DOAC/warfarin
- Often treated outpatient
Pulmonary Embolism
- Massive PE: tPA or embolectomy
- Anticoagulation: heparin → DOAC/warfarin
DVT
- Early ambulation, SCDs
- Prophylactic enoxaparin
- Report new dyspnea or chest pain
Pulmonary Embolism
- Early ambulation, SCDs
- IVC filter if can't anticoagulate
- Prophylactic enoxaparin
DVT
- ★DVT + new dyspnea → suspect PE
Pulmonary Embolism
- Hypotension + RV strain = massive PE
DVT
- Embolization to lungs (PE)
- Post-thrombotic syndrome
Pulmonary Embolism
- Cardiac arrest (massive PE)
- Right heart failure
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Swollen hot leg = DVT stays put. Sudden dyspnea + chest pain = the clot moved to the lungs.
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Go further
- Commonly confusedDVT vs Pulmonary EmbolismClot in the leg vs clot in the lung — one can become the other.
- TopicDeep Vein ThrombosisA swollen, warm calf after surgery might seem minor — but the clot hiding in that deep vein can silently migrate and become a life-threatening pulmonary embolism within hours.
- TopicPulmonary EmbolismA DVT patient who suddenly becomes tachycardic, hypoxic, and short of breath may have minutes — not hours. Recognizing PE fast changes survival.
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