[Efficiency of high-flow dialyzers in removal of beta-2-microglobulin].

BACKGROUND

[corrected] Beta-2-microglobulin (beta 2M) is protein with a molecular weight of 11.800 Daltons. A 30-fold or greater increase is found in patients(pts) over 10 years (ys) on haemodialysis (HD). The main aim of study is to evaluate high-flux (HF) dialyzer efficacy on beta 2M removal.

METHODS

A sample of 15 pts was selected, 9 males and 6 females, aged 45.7 ys (31.60), mean duration on HD 156,3 months. All pts were dialyzed by standard bicarbonate HD. We used 2 type of HF membrane: cellulose diacetate (CDA) and polysulphone (PS). A blood sample for beta 2M was drown before HD, 20 minute after start of HD (for clearance beta 2M) and after HD.

RESULTS

Average plasma beta 2M concentration was 53.15 mg/L (27-fold increase than normal values). Post/pre beta 2M ratio was 0.73 with clearance of 23.1 +/- 8.9 ml/min (QB = 250 ml/min, QD = 600 ml/min) for CDA dialyzers, and post/pre beta 2M ratio 0.51 with clearance of 31.9 +/- 4.5 ml/min(QB = 250 ml/min, QD = 600 ml/min) for PS dialyzer, respectively. The CDA membrane was able to remove 103 +/- 29 mg of beta 2M during a 4-hours HD session, and PS membrane 139 +/- 5,1 mg, respectively.

CONCLUSION

The only HF membranes are efficient on beta 2M removal.