我们研究了慢性肾功能不全患者的止凝血系统，发现出血倾向与高凝倾向并存，且随肾功能损伤加重，两种倾向均趋于加重。抗凝血酶活性增强部分平衡了高凝倾向。故临床上少有血栓形成，而出血成为主要特点。 We studied the hemostatic system in patients with chronic renal failure, found that bleeding tendencies coexist with hypercoagulability tendency, and both tend to aggravate as renal dysfunction increases. Antithrombin activity enhances the partial balance of the tendency to hypercoagulability. Therefore, few clinically rare thrombosis, and bleeding as the main feature.