🩸 Thromboembolic Disease (CEN Level)
Thromboembolic disease includes deep vein thrombosis (DVT) and pulmonary embolism (PE), two conditions that can quickly progress from mild symptoms to life-threatening instability.
This page builds from anatomy → physiology → pathophysiology → assessment → ED nursing priorities so emergency nurses can identify clot formation early and prevent catastrophic embolism.
- Understand Virchow’s Triad and how clots form
- Differentiate DVT from pulmonary embolism
- Recognize ED priorities for suspected PE or limb DVT
- Leg swelling can mean DVT until ruled out
- Sudden dyspnea + chest pain + tachycardia → think PE 🫁
- Early anticoagulation and escalation saves lives
⚡ Rapid Pattern Recognition: DVT vs Pulmonary Embolism
| Feature | 🦵 Deep Vein Thrombosis | 🫁 Pulmonary Embolism |
|---|---|---|
| Primary problem | Clot formation in deep veins (often legs) | Clot travels to pulmonary arteries blocking blood flow |
| Common symptoms | Leg swelling, warmth, redness, pain | Dyspnea, pleuritic chest pain, tachycardia, hypoxia |
| Danger | Clot migration → pulmonary embolism | Obstructed pulmonary circulation → right heart strain → shock |
| Diagnostic tools | Duplex ultrasound | CT pulmonary angiography, D-dimer, V/Q scan |
“Turn Phone Sideways to Take the (10) Question Exam.”
Always evaluate for respiratory symptoms when a clot is suspected.
🧬 Anatomy & Physiology
- Veins return blood to the heart with low pressure
- Valves and muscle contractions help move blood upward
- Venous stasis can promote clot formation
- Right ventricle pumps blood to pulmonary arteries
- Clots obstructing these vessels reduce oxygenation
- Large emboli cause acute right ventricular failure
- Oxygen delivery depends on cardiac output + lung perfusion
- PE blocks blood flow to alveoli → ventilation-perfusion mismatch
- This results in hypoxemia and dyspnea
🧬 Pathophysiology: Virchow’s Triad
Immobility, long travel, hospitalization, paralysis
Cancer, pregnancy, hormones, genetic clotting disorders
Surgery, trauma, vascular damage
👀 Assessment (CEN-Style)
- Unilateral leg swelling
- Warmth and redness
- Pain or tenderness along vein
- Calf circumference difference
- Sudden dyspnea
- Pleuritic chest pain
- Tachycardia
- Hypoxia
- Syncope or hypotension in massive PE
🧪 Diagnostics (ED)
- Duplex ultrasound (DVT)
- CT pulmonary angiography (PE)
- V/Q scan if CT contraindicated
- D-dimer (screening tool)
- ABG for hypoxia
- Troponin/BNP in severe PE
🩺 ED Management
🚨 Immediate Priorities
- Oxygen support and continuous monitoring
- IV access and labs
- Anticoagulation per provider order
- Prepare for thrombolytics in massive PE
- Hypotension
- Syncope
- Severe hypoxia
- Signs of right heart failure
🧠 CEN-Style Checkpoint
1) What triad explains most thrombus formation?
Answer: Virchow’s Triad.
2) Sudden dyspnea + pleuritic chest pain + tachycardia should make you suspect what?
Answer: Pulmonary embolism.
📌 One-Screen Summary
- Leg clot formation
- Swelling, warmth, pain
- Risk of pulmonary embolism
- Clot blocks pulmonary artery
- Dyspnea, chest pain, hypoxia
- Requires rapid anticoagulation and escalation
Learn Emergency Medicine From Someone Who Has Lived It
For more than 35 years in emergency medicine, Jeffery Bratcher has worked in environments where seconds matter, prioritization saves lives, and clinical judgment must be immediate.
The CEN® exam tests that exact type of thinking. Elite CEN Prep was built to train emergency nurses to recognize patterns, prioritize care, and answer exam questions the same way experienced ER clinicians think.
This is not memorization. This is clinical reasoning training for emergency nurses.
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