Index: MessagePayloads.h
===================================================================
diff -u -r689676afe7ceebf66b1b78e315b1dcd28524fe2c -r14c30fc8f559017216b9e230dd11fda984184359
--- MessagePayloads.h	(.../MessagePayloads.h)	(revision 689676afe7ceebf66b1b78e315b1dcd28524fe2c)
+++ MessagePayloads.h	(.../MessagePayloads.h)	(revision 14c30fc8f559017216b9e230dd11fda984184359)
@@ -54,8 +54,10 @@
     BOOL start;                                         ///< Flag indicating whether to start pre-gen dialysate(TRUE) or stop (FALSE).
     F32  dialRate;                                      ///< Set dialysate rate (mL/min).
     F32  dialTemp;                                      ///< Set dialysate temperature (deg C).
-    U32  acidType;                                      ///< Type of acid being used to make dialysate.
-    U32  bicarbType;                                    ///< Type of bicarb being used to make dialysate.
+    F32  acidConvFactor;                                ///< Conversion factor of acid type selected.
+    F32  bicarbConvFactor;                              ///< Conversion factor of bicarbonate.
+    U32  sodium;                                        ///< Set sodium being used to make dialysate.
+    U32  bicarbonate;                                   ///< Set bicarbonate being used to make dialysate.
 } PRE_GEN_DIALYSATE_REQ_PAYLOAD_T;
 
 /// Enumeration of operation modes.  These are in order of priority (highest to lowest).