Angiological examination method with the ultrasound Doppler for the diagnosis of chronic venous insufficiency and arterial occlusive disease. The examination method is particularly suitable for detecting insufficiency of the crust.
- In healthy veins, a flow surge at the end of the inspiratory period can be heard due to a discontinuous, breath-dependent flow in the veins. In the Valsalva test, no sound is audible when there are sufficient valves due to a flow stop.
- In case of pelvic vein thrombosis: higher frequency continuous flow noise.
- In case of muzzle valve insufficiency: cannon beat during the Valsalva test.
- Clear retrograde flow noise in the exspirium and in the Valsalva test can be detected via insufficient perforating veins. Similarly, truncal varicosis must be secured by a "Doppler" examination of the vena saphena magna.