 Three main modalities of RRT are available : hemodialysis , continuous hemofiltration and peritoneal dialysis . The former two require access to the bloodstream ( a dialysis catheter ) , while peritoneal dialysis is achieved by instilling fluid into the abdominal cavity and later draining it . Hemodialysis , which is normally done several times a week in chronic kidney disease , is often required on a daily basis in rhabdomyolysis . Its advantage over continuous hemofiltration is that one machine can be used multiple times a day , and that continuous administration of anticoagulant drugs is not necessary . <unk> is more effective at removing large molecules from the bloodstream , such as myoglobin , but this does not seem to confer any particular benefit . <unk> dialysis may be difficult to administer in someone with severe abdominal injury , and it may be less effective than the other modalities . 
