Fresenius Medical Care 5008, Operating Instructions Manual

Page: 237 / 328

Chapter 11: System Description
Fresenius Medical Care 5008 OP 5/09.06 11-27
Conductivity and temperature sensors check the dialysate for the
correct mixing ratio and temperature. If these are not within the set
alarm limits, the dialyzer supply valve closes and the bypass valve
opens, therefore discharging any incorrect dialysate directly to the
drain.
Transmembrane pressure is calculated from the values of the dialysate
pressure transducers. The blood leak detector generates an alarm if
any blood loss is detected in the dialysate. The preset correct fluid
removal from the patient is achieved by the UF pump whilst the flow
pump controls the dialysate flow from the dialyzer to the balancing
chamber. The used dialysate is then passed via the heat exchanger to
the drain to be removed.
When the disinfection programs are in progress, disinfectant is supplied
via the mixing system and the hydraulics to clean and disinfect the unit.
11.5.4 Description bi b ag
®
When using the bi b ag
®
, a bag containing sodium bicarbonate powder
(NaHCO
3
) is used instead of a canister containing a liquid bicarbonate
solution.
The powder is prepared in the hemodialysis system to produce ready-
to-use bicarbonate.
For recommended values for the maximum treatment times in relation
to the package size used and the dialysate flow refer to the table below.
11.5.5 OCM Description
O
Information regarding OCM
OCM logo
OCM
®
is a registered trademark.
Intended use
Fields of application The OCM allows determination of the average effective urea clearance
(K), the dialysis dose Kt/V and the plasma sodium concentration during
dialysis.
Package size Maximum treatment times
bi b ag
®
650 g (NaHCO
3
) 300 ml/min approx. 10 hours
500 ml/min approx. 6 hours
800 ml/min approx. 4 hours
bi b ag
®
900 g (NaHCO
3
) 300 ml/min approx. 15 hours
500 ml/min approx. 9 hours
800 ml/min approx. 6 hours