Setting The Default Dialysate Flow - Fresenius Medical Care 2008T Operator's Manual

Appendix C
Figure 79 – Setting the Default Dialysate Flow
Depending on Service Mode selections, the operator may have a choice of 1.5x and/or 2x for
the dialysate flow rate. A selection of 1.5x is appropriate for Optiflux dialyzers that have
excellent distribution of flow in the dialysate compartment. Other types of dialyzers should
probably be set at 2x. See the blood flow rate table on page 265 for information regarding the
actual dialysate flow relative to the blood flow.
Warning! When the dialyzer is connected during setup, be sure that the dialysate flow rate
is at least the minimum required rate.
Note: Dialysate flow changes are generally delayed about 30 seconds after a change in the
blood pump rate to prevent unnecessary flow adjustments during priming and to allow the
machine to stabilize before determining the new dialysate flow rate.
Note: With Auto Flow, even though the dialysate flow is expressed as a multiple of the
blood flow rate, the dialysate flow is not exactly the calculated multiple of the blood flow.
The dialysate flow changes in increments of 100 ml/min only. In order to be conservative
with lower dialysate flow rates, each transition point to the next higher dialysate flow rate is
somewhat earlier than one would calculate. See the table on page 265 for more details.
250
To set Auto Flow,
select the
Dialysate Flow
button.
Use the  key to raise the
value past 800. Depending on
the Service Mode Auto Flow
Selection, the button will
display either 1.5x or 2x.
Press the CONFIRM key to
save the change. The Auto
Flow rate will have an 'a'
preceding the value. Auto
Flow will begin in about 30
seconds.
2008T Machine Operator's Manual P/N 490122 Rev N
Note: To stop Auto
Flow, select the
Dialysate Flow button
and scroll down to the
desired flow rate and
press CONFIRM.