KoA for urea varied with dialyzer model,but the effect of Qb,Qd. Urea KoA did not change significantly when Qb increased from 300 to 500 ml/min at Qd of 500,800 and 1000 ml/ min.

• 透析液流量(Qd)保持恒定时(分别为500,800,1000 ml/min),尿素KoA在血流量从300增加到400,500ml/min时,KoA并不增加;