The study aims at evaluating the effectiveness of "bao th~n thang" large intestine retention enema in chronic renal failure stage I, II. 33 patients treated at Military Institute of Traditional Medicine from May 2003 to November 2006 played as participants in the study. Clinical trial, pre/post-test methods were conducted. The results showed that Urea reduction rate of serum counted at 84,84 percent
Creatinine reduction rate of serum counted at 96,97 percent in which creatine reduction 30 percent rate of serum was 75.76 percent.