👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Physiological Adaptation🔖 Free to read, print, and share
Also known as: DVT · blood clot in leg · deep vein clot · leg clot
Deep vein thrombosis: a clot within a deep leg vein. Illustration: BruceBlaus via Wikimedia Commons, CC BY 3.0.
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Use this quick-reference guide to spot, treat, and prevent Deep Vein Thrombosis on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
🩺 Signs
Unilateral leg swelling, warmth
Redness, calf pain, tenderness
🚩 Report
PE: sudden SOB, chest pain
Do NOT massage leg
✅ Do
Anticoag: heparin → warfarin/DOAC
Elevate leg, bed rest early
Warm compress, SCDs prevention
🎓 Teach
Ambulate, hydrate, no crossing legs
Bleeding precautions on AC
📚 Deep Vein Thrombosis — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Deep vein thrombosis is a blood clot that forms in a deep vein, most often in the legs, due to the factors of Virchow's triad: blood stasis, vessel wall injury, and hypercoagulability. The most dangerous complication is pulmonary embolism, which occurs if the clot dislodges and travels to the lungs. Risk factors include immobility, surgery, pregnancy, oral contraceptives, and cancer.
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Key points
Understand these first
The affected limb is typically swollen, warm, red, and tender, often calf or thigh.
Unilateral leg swelling with calf pain is a classic finding.
Virchow's triad of venous stasis, endothelial injury, and hypercoagulability explains clot formation.
Pulmonary embolism is the major life-threatening complication if the clot embolizes.
Risk increases with immobility, recent surgery, long travel, pregnancy, estrogen use, and malignancy.
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Nursing priorities
What to do, in order
Maintain bed rest as ordered initially and elevate the affected extremity to reduce swelling.
Administer anticoagulant therapy such as heparin or low-molecular-weight heparin as prescribed.
Apply warm compresses if ordered and avoid massaging or rubbing the affected leg.
Apply sequential compression devices to unaffected limbs and encourage early ambulation for prevention.
Monitor for signs of pulmonary embolism and for bleeding from anticoagulation.
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Red flags — report now
Escalate immediately
Sudden dyspnea, sharp pleuritic chest pain, tachycardia, or hypoxia signals pulmonary embolism and is a medical emergency.
Never massage or rub the affected limb because it can dislodge the clot.
Signs of anticoagulation bleeding such as hematuria, black stools, or unusual bruising must be reported immediately.
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Labs & values
Numbers to know
D-dimer: elevated suggests clot (normal less than 0.5 mcg/mL)
aPTT: therapeutic 1.5-2.5 times control for heparin (about 46-70 seconds)
INR: 2.0-3.0 therapeutic for warfarin; platelets to monitor for HIT
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Patient teaching
What patients must know
Take anticoagulants exactly as prescribed and watch for and report any signs of bleeding.
Avoid prolonged sitting or standing, ambulate frequently, and stay hydrated, especially during long travel.
Do not cross the legs or wear constrictive clothing, and report new leg swelling, sudden chest pain, or shortness of breath.
❓ Deep Vein Thrombosis: NCLEX FAQs
What are the priority nursing interventions for Deep Vein Thrombosis?
Maintain bed rest as ordered initially and elevate the affected extremity to reduce swelling. Administer anticoagulant therapy such as heparin or low-molecular-weight heparin as prescribed. Apply warm compresses if ordered and avoid massaging or rubbing the affected leg. Apply sequential compression devices to unaffected limbs and encourage early ambulation for prevention.
What are the warning signs of Deep Vein Thrombosis a nurse must report?
Sudden dyspnea, sharp pleuritic chest pain, tachycardia, or hypoxia signals pulmonary embolism and is a medical emergency. Never massage or rub the affected limb because it can dislodge the clot. Signs of anticoagulation bleeding such as hematuria, black stools, or unusual bruising must be reported immediately.
What do I need to know about Deep Vein Thrombosis for the NCLEX?
The affected limb is typically swollen, warm, red, and tender, often calf or thigh. Unilateral leg swelling with calf pain is a classic finding. Virchow's triad of venous stasis, endothelial injury, and hypercoagulability explains clot formation. Pulmonary embolism is the major life-threatening complication if the clot embolizes.
What patient teaching is important for Deep Vein Thrombosis?
Take anticoagulants exactly as prescribed and watch for and report any signs of bleeding. Avoid prolonged sitting or standing, ambulate frequently, and stay hydrated, especially during long travel. Do not cross the legs or wear constrictive clothing, and report new leg swelling, sudden chest pain, or shortness of breath.
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Quick Tip
The affected limb is typically swollen, warm, red, and tender, often calf or thigh.