Fresenius Medical Care 2008K Operator's Manual page 69

Note: During the SVS program, the actual conductivity bar, shown in bar graph on the
Dialysate screen, should be centered in the alarm window. This may require shifting the
position of the upper and lower alarm limits using the Alarm Position button. See
"Conductivity Limits" on page 56.
Note: If any SVS parameter is changed after the program has started (SVS must be turned off
to change), a new SVS program is initiated with the displayed SVS time and SVS start Na.
The Electrolyte Constituents
The acid concentrate is the major source of electrolytes in the dialysate. Increasing the Na
concentration in the dialysate, therefore, increases the amount of acid concentrate.
Increasing the amount of acid concentrate also increases the concentration of the other
electrolytic constituents. These changes can be observed in the electrolyte constituents shown in
the left side of the "SVS Profile" subscreen.
To observe the electrolyte constituents for the higher concentration of sodium, touch Start Na
The values in the left column change to reflect the increased sodium (see Figure 31 on page 66).
Touch Base Na
+
of the Na concentrations corresponds to the values. If neither button is highlighted, the
electrolyte constituents values defaults to the Base Na
Operation
Once the SVS program is started, the maximum sodium level (Start Na
three minutes. The theoretical conductivity (TCD) will immediately adjust to the expected
conductivity for the selected Na
also track upward, to within the maximum conductivity alarm window limit of 0.5 mS/cm above
TCD. While the alarm window is rising, the TCD may be outside of the alarm limits. The
machine, however, may not be in an alarm state because the limits are tracking the actual
conductivity. After the tracking is complete, the alarm window moves automatically to the
expected conductivity based on the selected parameters and starting alarm limits. The SVS Time
starts counting down when the Start Na
If an SVS program is in progress, pressing the SVS on/off key on the control panel will pause the
program. The conductivity will return to the Base Na
Alarms may occur as the conductivity stabilizes. The operator has two options:

Restarting the program by pressing the SVS on/off key on the control panel. The SVS-
Time and Start Na

Terminate the program by touching the SVS Time button on the "SVS Profile" subscreen,
entering zero using the data entry keypad, and pressing CONFIRM or by changing profile
to "None" and pressing CONFIRM.
2008K Operator's Manual rev. K
+ to observe the constituents at the base concentration. The arrow indicates which
+
level. As the actual conductivity rises, the alarm window will
+ may need to be adjusted.
+
setting, as indicated by the arrow.
+
level is reached.
+
level and the SVS-Time countdown stops.
Heparin Screen Settings
+
+
+
) is reached after about
69
.