Index: firmware/App/Services/TxParams.c
===================================================================
diff -u -r3aa01440e13b2cec939bdcf791ab32c0c0d1cd73 -r0c7cea955e3581c468341f20efc3b47ca4b9a001
--- firmware/App/Services/TxParams.c	(.../TxParams.c)	(revision 3aa01440e13b2cec939bdcf791ab32c0c0d1cd73)
+++ firmware/App/Services/TxParams.c	(.../TxParams.c)	(revision 0c7cea955e3581c468341f20efc3b47ca4b9a001)
@@ -112,7 +112,7 @@
 static const TREATMENT_PARAMS_PROPERTIES_T TREAT_PARAMS_PROPERTIES[ NUM_OF_TREATMENT_PARAMS ] =
 {   //         type                min           max         default
     { CRITICAL_DATA_TYPE_U32, {.uInt=0},    {.uInt=2},    {.uInt=0}    }, // TREATMENT_PARAM_TREATMENT_MODALITY
-    { CRITICAL_DATA_TYPE_U32, {.uInt=0},    {.uInt=2},    {.uInt=0}    }, // TREATMENT_PARAM_HDF_TREATMENT_MODE
+    { CRITICAL_DATA_TYPE_U32, {.uInt=0},    {.uInt=2},    {.uInt=0}    }, // TREATMENT_PARAM_HDF_DILUTION
     { CRITICAL_DATA_TYPE_U32, {.uInt=50},   {.uInt=500},  {.uInt=50}   }, // TREATMENT_PARAM_BLOOD_FLOW
     { CRITICAL_DATA_TYPE_U32, {.uInt=50},   {.uInt=600},  {.uInt=50}   }, // TREATMENT_PARAM_DIALYSATE_FLOW
     { CRITICAL_DATA_TYPE_U32, {.uInt=60},   {.uInt=480},  {.uInt=60}   }, // TREATMENT_PARAM_TREATMENT_DURATION
@@ -458,15 +458,15 @@
             break;
 
         case TREATMENT_MODALITY_HD:
-            result = ( ( ( param == TREATMENT_PARAM_HDF_TREATMENT_MODE ) || ( param == TREATMENT_PARAM_SUBST_FLUID_VOLUME ) ) ? TRUE : FALSE );
+            result = ( ( ( param == TREATMENT_PARAM_HDF_DILUTION ) || ( param == TREATMENT_PARAM_SUBST_FLUID_VOLUME ) ) ? TRUE : FALSE );
             break;
 
             // TODO uncomment in phase 3 when ISO UF feature is required
 //        case TREATMENT_MODALITY_ISOLATED_UF:
 //            switch ( param )
 //            {
 //                // Treatment parameters that are not applicable for isolated UF
-//                case TREATMENT_PARAM_HDF_TREATMENT_MODE:
+//                case TREATMENT_PARAM_HDF_DILUTION:
 //                case TREATMENT_PARAM_SUBST_FLUID_VOLUME:
 //                case TREATMENT_PARAM_DIALYSATE_FLOW:
 //                case TREATMENT_PARAM_DIALYSATE_TEMPERATURE:
@@ -549,7 +549,7 @@
     else
     {
         // Range check treatment parameters excluding treatment modality and up to (but not including) UF volume
-        for ( param = TREATMENT_PARAM_HDF_TREATMENT_MODE; param < TREATMENT_PARAM_UF_VOLUME; param++ )
+        for ( param = TREATMENT_PARAM_HDF_DILUTION; param < TREATMENT_PARAM_UF_VOLUME; param++ )
         {
             reasons[ param ] = REQUEST_REJECT_REASON_NONE;
 
Index: firmware/App/Services/TxParams.h
===================================================================
diff -u -r11a668a2f4a0401eed544be570d9102d143b6f00 -r0c7cea955e3581c468341f20efc3b47ca4b9a001
--- firmware/App/Services/TxParams.h	(.../TxParams.h)	(revision 11a668a2f4a0401eed544be570d9102d143b6f00)
+++ firmware/App/Services/TxParams.h	(.../TxParams.h)	(revision 0c7cea955e3581c468341f20efc3b47ca4b9a001)
@@ -42,7 +42,7 @@
 typedef struct
 {
     U32 treatmentModality;                      ///< User set treatment modality option
-    U32 hdfTreatmentMode;                       ///< User set HDF treatment mode option
+    U32 hdfDilution;                            ///< User set HDF dilution option
     U32 bloodFlowRate_mL_min;                   ///< User set blood flow rate (in mL/min)
     U32 dialysateFlowRate_mL_min;               ///< User set dialysate flow rate (in mL/min)
     U32 treatmentDuration_min;                  ///< User set treatment duration (in min)