A clinical test for assessing the patency of the deep femoral veins, used in preparations for operation for varicose veins. With the patient standing and veins filled, a tourniquet is placed around the mid-thigh and the patient walks for 5 minutes. If the saphenous veins collapse below the tourniquet the deep veins are patent and the communicating veins are competent; if unchanged, both saphenous and communicating veins are incompetent and if the veins increase in prominence and pain occurs the deep veins are occluded.
- G. C. Perthes:
Über die Operation der Unterschenkelvarizen nach Trendelenburg.
Deutsche medizinische Wochenschrift, Berlin, 1895, 16: 253-257.
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