Fresenius Medical Care 2008K Operator's Manual page 83

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 69.
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 38 on
page 80). Touch Base Na
indicates which of the Na
highlighted, the electrolyte constituents values default to the Base Na
the arrow.
Operation
Once the SVS program is started, the maximum sodium level (Start Na
about three minutes. The theoretical conductivity (TCD) will immediately adjust to the
expected conductivity for the selected Na
window will 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
countdown stops. 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 Hemodialysis Machine Operator's Manual Rev P
+
to observe the constituents at the base concentration. The arrow
+
concentrations corresponds to the values. If neither button is
+
level. As the actual conductivity rises, the alarm
+
may need to be adjusted.
Chapter 3—Setting Treatment Parameters
+
setting, as indicated by
+
) is reached after
+
level is reached.
+
level and the SVS-Time
+
83