Index: firmware/App/Services/TxParams.c
===================================================================
diff -u -rb4166e3c1342a8ddbf1dee8df4eaeb46fb0e6d00 -r12af1351f6db7747ebe2b4c52a9bac41ef551968
--- firmware/App/Services/TxParams.c	(.../TxParams.c)	(revision b4166e3c1342a8ddbf1dee8df4eaeb46fb0e6d00)
+++ firmware/App/Services/TxParams.c	(.../TxParams.c)	(revision 12af1351f6db7747ebe2b4c52a9bac41ef551968)
@@ -123,6 +123,7 @@
     { CRITICAL_DATA_TYPE_U32, {.uInt=300},  {.uInt=500},  {.uInt=300}  }, // TREATMENT_PARAM_PRIME_RINSEBACK_VOLUME
     { CRITICAL_DATA_TYPE_U32, {.uInt=0},    {.uInt=3},    {.uInt=0}    }, // TREATMENT_PARAM_HEPATITIS_B
     { CRITICAL_DATA_TYPE_U32, {.uInt=0},    {.uInt=2},    {.uInt=0}    }, // TREATMENT_PARAM_ACID_CONCENTRATE
+    { CRITICAL_DATA_TYPE_U32, {.uInt=0},    {.uInt=1},    {.uInt=0}    }, // TREATMENT_PARAM_CONFIRMATION
     { CRITICAL_DATA_TYPE_F32, {.sFlt=0.0},  {.sFlt=48.0}, {.sFlt=1.0}  }, // TREATMENT_PARAM_SUBST_FLUID_VOLUME
     { CRITICAL_DATA_TYPE_F32, {.sFlt=0.0},  {.sFlt=2.0},  {.sFlt=0.0}  }, // TREATMENT_PARAM_HEPARIN_BOLUS_VOLUME
     { CRITICAL_DATA_TYPE_F32, {.sFlt=0.0},  {.sFlt=3.0},  {.sFlt=0.0}  }, // TREATMENT_PARAM_HEPARIN_DELIVERY_RATE
@@ -439,6 +440,7 @@
     BOOL paramsAreInvalid = TRUE;
     BOOL paramsAreInRange, paramsAreConsistent, isUFValid;
     BOOL result = FALSE;
+    BOOL paramsConfirmed = FALSE;
     TREATMENT_PARAMS_DATA_PAYLOAD_T params;
     U32 rejReasons[ NUM_OF_TREATMENT_PARAMS ];
 
@@ -456,6 +458,9 @@
 
         // Extract treatment parameters from given payload to staging array so we can more easily work with them
         extractTreatmentParamsFromPayload( params );
+        // Flag that indicates if the user have sent the tx params validation from pre-treatment create rx state,
+        // so that if all params are valid, TD software will transition state to patient connection
+        paramsConfirmed = (BOOL)stagedParams[ TREATMENT_PARAM_TREATMENT_DURATION ].uInt;
 
         // Range check each treatment parameter
         paramsAreInRange = checkTreatmentParamsInRange( &rejReasons[0] );
@@ -473,7 +478,10 @@
 
             paramsAreInvalid = FALSE;
             validTreatParamsReceived = TRUE;    // direct confirmation, no validation state exists now
-            treatParamsConfirmed = TRUE;
+            if ( TRUE == paramsConfirmed )
+            {
+                treatParamsConfirmed = TRUE;
+            }
 
             // Set all treatment parameters after validation
             for ( param = TREATMENT_PARAM_FIRST_UINT; param < NUM_OF_TREATMENT_PARAMS; param++ )
Index: firmware/App/Services/TxParams.h
===================================================================
diff -u -rd495985858b3ef51b695a44ceedf6c13a8edb821 -r12af1351f6db7747ebe2b4c52a9bac41ef551968
--- firmware/App/Services/TxParams.h	(.../TxParams.h)	(revision d495985858b3ef51b695a44ceedf6c13a8edb821)
+++ firmware/App/Services/TxParams.h	(.../TxParams.h)	(revision 12af1351f6db7747ebe2b4c52a9bac41ef551968)
@@ -57,6 +57,7 @@
     U32 rinsebackVolume_mL;                     ///< User set rinseback volume (in mL)
     U32 hepatitisBStatus;                       ///< User set Hepatitis B status option
     U32 acidConcentrate;                        ///< User set acid concentrate option
+    U32 finalConfirmation;                      ///< Confirmation flag indicating treatment params validated are final
     F32 substitutionFluidVolume_L;              ///< User set substitution fluid volume (in L)
     F32 hepBolusVolume_mL;                      ///< User set Heparin bolus volume (in mL)
     F32 hepDeliveryRate_mL_hr;                  ///< User set Heparin delivery rate (in mL/hr)