Can deep vein thrombosis in the lower extremities be ruled out without swelling in the lower extremities? No, it cannot be ruled out. Because it is true that 40-60% of patients in clinical work have lower extremity DVT without leg swelling, and thus do not receive attention from the patients themselves or their doctors, which often leads to serious consequences, such as pulmonary embolism. What we need to do in general for lower extremity DVT is to prevent it from happening. So who needs to prevent the occurrence of thrombosis? 1, age ≥ 65 years old, and limb braking ≥ 3 days, bedridden ≥ 3 days, hemiplegia or lower limb paralysis ≥ 3 days with hypercoagulable state. 2, chronic pulmonary hypertension with hypercoagulable state. 3, History of deep vein embolism or deep phlebitis. (primary, placement) 4, lower extremity venous reflux disorder (such as severe varicose veins). 5.Patients with malignant tumor. 6, Patients with severe infections (acute and life-threatening infections caused by pathogenic bacteria, including systemic inflammatory response syndrome, sepsis). 7, pregnancy and postpartum. 8, long-term oral contraceptive drugs. 9, Patients using inotropic agents in anesthesia. 10.Patients with dehydration. 11.Patients with symptoms of lower limb deep vein thrombosis such as lower limb swelling, pain and dysfunction. 12.Elderly people who travel by airplane for more than 6 hours without lower limb activities in between are likely to get lower limb deep vein thrombosis, which is also called economic warehouse syndrome. 13, lower limb and pelvic trauma; closed craniocerebral injury; spinal cord injury; braking after spinal injury. Among them, multiple fractures of the lower extremities, severe pelvic fractures after surgery. Artificial total hip arthroplasty; artificial total knee arthroplasty; patients after periprosthetic hip fracture should pay particular attention to prevent the occurrence of thrombosis.
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