What is the reason for the purple calves

You should pay attention when your calves turn purple. The most likely reason is blood clots in the blood vessels of the lower limbs. This cannot be checked through blood tests. You should go to the cardiovascular department for examination. An ultrasonic examination of the blood vessels of both lower limbs can be performed. If it is a blood clot, it should be treated in time. After all, the harm caused by blood clots in the legs is relatively large. There are many causes of this type of blood clot. Let us take a look.

What causes purple calves

1. Mechanical injury

Mechanical injuries such as local venous contusion, laceration, fracture fragment puncture and other sharp injuries can induce venous thrombosis. For example, femoral shaft fracture injures the femoral vein, femoral neck fracture injures the common femoral vein, and pelvic fracture injures the common iliac vein, all of which can be complicated by deep vein thrombosis of the lower limbs.

Surgeries that directly involve veins, such as deep vein valve repair, venous bypass, and venous segment transplantation, are often complicated by venous thrombosis. Repeated venous puncture or placement of an infusion catheter in a vein may also lead to venous thrombosis.

According to relevant reports of 120 cases, 4 cases were caused by damage to the vein or venous intima, namely venipuncture, saphenous vein cut-off, saphenous vein stripping and popliteal vein iron injury. 43 cases had postoperative vascular disease. During pregnancy, the uterus gradually enlarges, exerting pressure on the iliac vein; surgery on the pelvis, hip joint, and upper end of the femur can also indirectly or directly damage the femoral iliac vein and induce venous thrombosis.

2. Chemical damage

Large amounts of hypertonic glucose solution, various irritating antibiotics (such as tetracycline, erythromycin), anticancer drugs and contrast agents are infused intravenously. All of them can irritate the venous intima to varying degrees, damage endothelial cells, and induce venous thrombosis.

3. Infectious injury

Bacterial bloodstream infection can also induce venous thrombosis. Pelvic congestion, infection, endometritis and other infections before and after delivery can lead to venous thrombosis.

4. Other causes

Such as age-related obesity and anti-inflammatory protein C. Most patients with deep vein thrombosis of the lower limbs are middle-aged or older, with a particularly high incidence rate among the elderly, while children rarely develop the disease. Hypercoagulation of blood in the elderly may be physiological, and they are prone to various diseases that make blood easily coagulate, such as malignant tumors, cardiovascular diseases, cerebrovascular diseases, etc., which are important factors in venous thrombosis.

Secondly, the veins of the elderly gradually age, which is also the cause of deep vein thrombosis in the lower limbs. There are also reports that an anti-activated protein C phenomenon in the protein C anticoagulation pathway caused by an anticoagulant factor defect is the main cause of venous thrombosis. This disease may be related to genetic factors.