In the low risk group, a D-dimer can then be performed. A negative result rules out VTE, making further imaging studies (e.g. venous Doppler ultrasound or chest CT scan) unnecessary. The second use of ...

This can lead to problems that include varicose veins. Your doctor can diagnose venous insufficiency by examining your legs and by using a type of ultrasound test (duplex Doppler) to find out how well ...