Prospective study of natural history of deep vein thrombosis: early predictors of poor late outcomes.

Background: A proportion of patients with deep vein thrombosis (DVT) will develop postthrombotic syndrome (PTS). Currently, the only clearly identified risk factors for developing PTS are recurrent ipsilateral DVT and extensive proximal disease. The aim of the study was to assess the natural history of DVT and identify early predictors of poor clinical outcome at 5 years.

A prospective study of the fate of venous leg perforators after varicose vein surgery.

Objective: To describe the fate of perforator veins after surgical treatment of varicose veins and factors that influence this.

Methods: This prospective study of 104 patients assessed perforator veins by using duplex ultrasound scanning in 145 limbs before superficial vein surgery for varicose veins. Veins were marked preoperatively with ultrasound guidance and ligated with an open procedure; those missed were later treated with sclerotherapy.

Recurrence after varicose vein surgery: a prospective long-term clinical study with duplex ultrasound scanning and air plethysmography.

Objective: We observed long-term venous ultrasound and plethysmographic changes after varicose vein surgery, to determine factors that influence recurrence.

Methods And Materials: This observational sequential prospective study was carried out in an institutional referral center with day surgery. Subjects were 92 consecutive patients, ages 20 to 75 years, with symptomatic varicose veins in 127 limbs, who were able to complete regular assessment.