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The DIASAFE®plusUS is intended for the preparation of ultrapure dialysis fluid (for the 2008-series machines and 5008X machines) and sterile, non-pyrogenic substitution fluid (for the 5008X machines) from pretreated water and is not intended to provide primary purification. Attention must still be given to the chemical and microbiological quality of water and concentrates and the maintenance of supply systems (e.g. RO system, central delivery system). The microbiological quality (microbial count [CFU/mL] and endotoxin measurement [EU/mL]) of the incoming water should be < 200 CFU/mL and < 2 EU/mL, respectively.

The DIASAFE®plusUS can only be used with Fresenius Medical Care hemodialysis machines fitted for use with the DIASAFE®plusUS.

The DIASAFE®plusUS is a non-sterile dialysis fluid filter that produces ultrapure dialysis fluid (for the 2008-series machines and 5008X machines) and sterile, non-pyrogenic substitution fluid (for the 5008X machines) for use in chronic and acute hemodialysis and hemodiafiltration. The DIASAFE®plusUS reduces microbial contaminants including endotoxin in the dialysate during treatments. The DIASAFE®plusUS is available in one (1) configuration and is compatible for use with 2008 series and 5008X hemodialysis machines. It is installed on the hemodialysis machines using the DIAFIX™ Lock System. The DIAFIX™ Lock System is a standard feature on the hemodialysis machines and is installed during machine production.

The 2008 series hemodialysis machines use 1 DIASAFE®plusUS. Mixed dialysis fluid is forced through an open filter port across the fibers of the DIASAFE®plusUS. A closed bypass valve at the other end forces the dialysis fluid across the fiber membrane. Dialysis fluid passes through the porous membrane and into the filtrate compartment where it is allowed to flow through the uncapped side ports and into the hemodialyzer. Microorganisms and molecules too large to pass through the membrane are trapped in the fibers until they are flushed out, and/or disinfected during a routine cleaning cycle.

The 5008X hemodialysis system uses two (2) DIASAFE®plusUS for preparation of the dialysis and substitution fluid which can be used for up to 100 on-line HDF treatments. The dialysis fluid is filtered by the first DIASAFE®plusUS. A second DIASAFE®plusUS is used to filter the ultrafiltered dialysis fluid a second time to prepare the substitution fluid. The substitution fluid can be infused in the post-dilution mode (i.e., after the blood has passed through the dialyzer), in the pre-dilution mode (i.e., before the blood enters the dialyzer), or combined.

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