baxter ARENA - Sodium and Bicarbonate Profiling; Volumetric Proportioning System

7. Dialysate Preparation
7.2 SODIUM AND BICARBONATE PROFILING
Sodium and Bicarbonate Profiling permits the operator to set the
sodium and bicarbonate levels for the entire treatment. The
sodium and bicarbonate levels are changed in adjustable time
increments (15, 30 or 60 minutes) throughout the dialysis
treatment. The maximum and minimum sodium and sodium
bicarbonate levels are set by the technician in Customize Mode
using the Customization / Calibration screen. The conductivity
alarm limits automatically set around the expected conductivity at
the adjusted values.
When the Rinse Mode is started, the adjusted sodium and
bicarbonate values automatically set to the standard bath values.
If the sodium profiling is used after the sodium level was adjusted
using the SET ADJUSTED SODIUM button and keypad, the
profiling information will override the previously set adjusted
value. Similarly a SET ADJUSTED SODIUM button and keypad
entry will override a previously set profile.
If the bicarbonate profiling is used after the bicarbonate level was
adjusted using the SET ADJUSTED BICARB button and keypad,
the profiling information will override the previously set adjusted
value. Similarly a SET ADJUSTED BICARB button and keypad
entry will override a previously set profile.
If the sodium or bicarbonate level is adjusted during the Dialyze
Mode, the level will change to the new adjusted value when the
keypad ENT button is touched.
7.3 VOLUMETRIC PROPORTIONING SYSTEM
7.3.1 Overview
The Instrument's volumetric proportioning system consists of fixed
volume pumps for concentrates and a fixed volume metering
device for dialysate. The concentrate pumps and metering device
are linked electronically through the UF-Proportioning controller
to provide a fixed ratio proportioning system. The pumps can
change the speed to set values to match changes in the flow rate,
the programmable sodium and bicarbonate profiles, the sodium
button and the concentrate selection. Refer to Figure 7-2,
Hydraulic Diagram.
157-1278-914 Rev A 7-5
January 2004