Alterations in Blood Flow-patho

Advances skin pigmentation becomes brown skin venous

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Unformatted text preview: lvular incompetence or Results blockage within the venous system advances to involve deep veins. advances Skin pigmentation becomes brown, Skin venous stasis ulcers may develop, aching and cramping in legs. and Results when valvular incompetence Results involves the deep veins. involves Venous stasis ulcers are typically present. Venous Insufficiency Venous obstruction of venous drainage ↑capillary hydrostatic pressure edema, stasis pain risk of pulmonary embolus stasis ulcers and skin changes Deep Vein Thrombosis Deep Acute venous obstruction due to a thrombus, Acute trauma, thermal injury, septic state and is most commonly seen in the lower extremity. commonly May be life threatening. Injury to the lining of the vein causes decreased Injury circulation and stimulates the aggregation of platelets which will occlude the vessel. platelets Emboli may break away and travel to pulmonary Emboli circulation. circulation. Blood Clot in Vein Vein Deep Vein Thrombosis Deep Case Study Carrie, a 22-year-old student, is involved in a skiing accident and is admitted to the hospital with a broken right femur. Her only medication at the time of admission is oral contraceptives. She undergoes orthopedic surgical stabilization is placed in a cast and confined to bed. Five days after surgery, she develops sudden onset of sharp chest pain, shortness of breath, and hemoptysis. 1. What is the likely cause of Carrie’s pulmonary symptoms? 2. Doppler ultrasonography demonstrated a large thrombus in a deep vein in the right lower extremity. When a piece of the thrombus dislodged, why did she develop pulmonary embolism rather than a stroke? 3. What are Carrie’s risk factors for deep vein thrombosis? 4. What might be found on examination of Carrie’s lower extremities? Thrombophlebitis Thrombophlebitis Deep Vein (DVT) – – – – – – Extremity Edema General leg pain Fever redness tenderness positive Homan’s sign High Risk of PE Superficial – local Inflammation warm tender red red swollen – Collateral veins Collateral minimize edema minimize Low Risk of PE Lymphatics Lymphatics Transport volume approx equal to plasma Transport volume per day. volume Returns 25%-50% of the total circulat...
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