Preventing Deep Vein Thrombosis: Mobility, Prophylaxis, and Pulmonary Embolism Warning Signs
Teach early and frequent ambulation, ankle pumps and leg exercises every hour while awake, adequate fluids, and compression stockings, sequential compression devices, or anticoagulant prophylaxis as prescribed. On trips over 4 hours, move every 1 to 2 hours. Report unilateral leg swelling, warmth, redness, or pain the same day, never massage the leg, and call 911 for sudden dyspnea, chest pain, or hemoptysis.
Who needs this teaching
Clients after surgery, clients with reduced mobility, and clients with other risk factors for venous thromboembolism, and their caregivers. Deep vein thrombosis (DVT) is a thrombus in a deep vein, usually of the leg or pelvis. A pulmonary embolism (PE) occurs when a thrombus embolizes to the pulmonary arteries. Venous stasis, endothelial injury, and a hypercoagulable state (Virchow's triad) promote thrombus formation.
The priority teaching points
- Risk factors. Teach the client's own risk factors: surgery, especially orthopedic hip and knee surgery and major abdominal or pelvic surgery; immobility; travel over 4 hours; estrogen therapy, including oral contraceptives and hormone therapy; pregnancy and the postpartum period; cancer; prior venous thromboembolism; obesity; and smoking.
- Early ambulation. Walk as soon as the provider permits, and walk several times a day. Avoid long periods of sitting. Do not cross the legs or place pillows under the knees.
- Leg exercises. Perform ankle pumps, ankle circles, and quadriceps sets every hour while awake. Calf muscle contraction promotes venous return and reduces venous stasis.
- Hydration. Drink adequate fluids unless a fluid restriction is prescribed. Dehydration increases blood viscosity.
- Mechanical prophylaxis. Wear graduated compression stockings or sequential compression devices as prescribed. Measure for the correct stocking size. Apply stockings smoothly, without wrinkles or rolled tops. Remove them daily for skin inspection and hygiene. Use sequential compression devices whenever in bed.
- Anticoagulant prophylaxis. Take the prescribed anticoagulant, such as subcutaneous enoxaparin or a direct oral anticoagulant, for the full prescribed duration, including after discharge. Teach injection technique and bleeding precautions. Report bleeding.
- Travel. On trips over 4 hours, walk or stand and stretch every 1 to 2 hours. Perform calf exercises while seated. Choose an aisle seat, drink water, and limit alcohol. High-risk travelers use compression stockings or anticoagulant prophylaxis only as prescribed.
- Signs and response. DVT signs are unilateral leg edema, warmth, erythema, and pain or tenderness. Call the provider the same day. Never massage the affected leg; massage promotes embolization. PE signs are sudden dyspnea, pleuritic chest pain, tachycardia, hemoptysis, and syncope. Call 911.
Red flags the client reports
| Call the provider the same day | Call 911 or the local emergency number |
|---|---|
| Swelling of one leg | Sudden shortness of breath |
| Warmth, redness, or tenderness in one calf or thigh | Chest pain, especially with deep breathing |
| Leg pain or cramping that does not resolve | Coughing up blood |
| Bleeding gums or new bruising during anticoagulant therapy | Rapid heart rate with lightheadedness or syncope |
Teach-back questions
- "Show me the leg exercises you will do every hour."
- "How often will you get up during a long car trip?"
- "How will you put on your compression stockings?"
- "What will you do if one leg becomes swollen and sore?"
- "Which breathing symptoms mean you call 911?"
Teaching tips
- Demonstrate leg exercises and observe a return demonstration.
- Confirm the stocking size and observe the client apply the stockings.
- Write the anticoagulant name, dose, and end date on the handout.
- Include travel teaching for clients who plan a long trip.
Read more on NCLEXPace
- Immobility and VTE: Prevent the Clot Before It Travels
- Anticoagulants on the NCLEX: Heparin vs Warfarin vs DOACs
- Respiratory Map: COPD, Asthma, Pneumonia, PE, and Chest Tubes
Sources
- Harding MM, Kwong J, Hagler D, Reinisch C. Lewis's Medical-Surgical Nursing: Assessment and Management of Clinical Problems. 12th ed. Elsevier; 2023; Chapter: Vascular Disorders.
- Anderson DR, et al. American Society of Hematology 2019 Guidelines for Management of Venous Thromboembolism: Prevention of Venous Thromboembolism in Surgical Hospitalized Patients. Blood Adv. 2019;3(23):3898-3944.
- Schunemann HJ, et al. American Society of Hematology 2018 Guidelines for Management of Venous Thromboembolism: Prophylaxis for Hospitalized and Nonhospitalized Medical Patients. Blood Adv. 2018;2(22):3198-3225.
Why this matters for the NCLEX
Teaching is effective when the client states, "I will move my ankles every hour while I am awake," and "I will call 911 if I suddenly become short of breath." Statements requiring further teaching include, "I will massage my sore calf to ease the cramp," "I will stop my enoxaparin when I start walking," and "I will sit with my legs crossed during the flight."
Frequently asked questions
Why does the client never massage a swollen, painful leg?
Massage promotes dislodgement of the thrombus and embolization to the pulmonary arteries.
Does a client who walks after surgery still need prescribed anticoagulant prophylaxis?
Yes. Ambulation and anticoagulant prophylaxis work together. The client completes the full prescribed course.
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