(1) The impact of human upright posture spermatic vein reflux;
(2) The vein wall and surrounding connective tissue is weak or cremaster dysplasia;
(3) venous valve defects or insufficiency;
(4) The president of the left spermatic vein, and was a long trip into the renal vein at right angles, back resistance large;
(5) The vulnerability of the left internal spermatic vein before the near side of the symptoms of colon pressure;
(6) in the left renal vein between the aorta and superior mesenteric artery may be compressed, affecting return to form proximal clamp phenomenon;
(7) common iliac artery to pressure near the left common iliac vein, so that the input of the left tube obstructed venous return to form the phenomenon of remote clamp.

Dong's Chinese Medicine Research Institute, Shijiazhuang Tel :0311-88468620