How does immobility increase DVT/PE risk in respiratory patients and what nursing interventions reduce risk?

• A. Bed rest with no movement.
• B. Early mobilization, leg exercises, compression devices, pharmacologic prophylaxis as ordered, hydration, monitor for DVT/PE signs.
• C. High-flow oxygen therapy.
• D. Only hydration.

Answer: (B)

Immobility in respiratory patients promotes venous stasis, a key part of the process that leads to deep vein thrombosis and, if a clot travels to the lungs, pulmonary embolism. The calf muscles act as a pump that helps push blood back toward the heart, so when movement is limited, blood pools in the legs and clotting risk rises. The most effective nursing approach combines strategies to restore or mimic those muscle-pump effects, limit clot formation, and catch problems early.

Promoting early mobilization as soon as the patient is medically stable reduces venous stasis by reactivating the calf-pump mechanism and improving overall circulatory return. Leg exercises and calf-raising or ankle pumps strengthen and activate the venous return mechanism, further decreasing pooling even when full ambulation isn’t possible. Compression devices, such as graduated compression stockings or intermittent pneumatic compression, physically assist venous blood flow and counteract stasis in the lower extremities. Pharmacologic prophylaxis, when ordered, diminishes the blood’s ability to clot, providing a chemical barrier against DVT formation; it’s essential to monitor for bleeding risks and contraindications. Adequate hydration helps maintain normal blood viscosity, reducing thrombogenic tendency. Finally, ongoing assessment for signs of DVT (such as unilateral leg swelling, warmth, or tenderness) and PE (new or worsening shortness of breath, chest pain, tachycardia, hypoxia) supports timely treatment adjustments. Coordination with physical therapy and attention to skin integrity and device safety are important to maximize effectiveness and minimize complications.