Precautions for lower extremity venography

In some middle-aged and elderly people, problems often occur in the lower limb veins. Common lower limb venous diseases include lower limb venous thrombosis and lower limb varicose veins. If you feel that there is a problem with your lower limb veins, you must go to the hospital for examination in time. The main way doctors check the lower limb veins is through lower limb venography. However, there are many things to note about the medical technology of lower limb venography. So what are the precautions when performing lower limb venography?

1. Precautions for lower extremity venography

Preparation before angiography: Before angiography, the patient needs to undergo an iodine allergy test, with 1 ml of 30% diatrizoate meglumine injected intravenously, and observe for adverse reactions. If there are reactions such as nausea, cough, sneezing, runny nose, chest tightness, palpitations, urticaria, etc., it is a contraindication to the contrast agent. Patients should fast before angiography to prevent severe vomiting during angiography, which may affect the imaging effect. Administer 5 mg of dexamethasone intramuscularly 0.5 h before surgery, and prepare first aid supplies just in case.

2. Indications for lower extremity venography

1. Understand the location, range and degree of venous obstruction caused by lower extremity venous thrombosis or embolism, phlebitis, tumor erosion or trauma; 2. Clarify the function and anatomical location of varicose veins, deep vein valve function and perforating veins in the lower extremities;

3. Observe the surgical effects of thrombectomy, varicose veins or other lesions;

4. Understand the causes of chronic ulcers, swelling, pain and pigmentation of the lower limbs; 3. Estimate the location and extent of congenital venous lesions, etc.

3. Complications of lower extremity venography

Contrast medium reaction is a common complication. In mild cases, symptoms include nausea, chest tightness, urticaria, etc., which can generally be relieved on their own and no special treatment is required. In patients with severe vomiting, systemic urticaria, difficulty breathing, abdominal pain, severe headache and other obvious symptoms, stop taking the medicine immediately and give appropriate management and treatment. For those with breathing difficulties, give oxygen and apply promethazine. Anti-allergic drugs such as diphenhydramine and dexamethasone; those with abdominal pain can receive intramuscular injection of atropine, which will relieve the symptoms after treatment.