Index: firmware/App/Modes/StatePreTxRecirculate.c
===================================================================
diff -u -rc34ad5cb83749cca78001409699a1fecf1436b7f -r71a1673a75d7f63fd29554a8dbbec8daa7bff1ec
--- firmware/App/Modes/StatePreTxRecirculate.c	(.../StatePreTxRecirculate.c)	(revision c34ad5cb83749cca78001409699a1fecf1436b7f)
+++ firmware/App/Modes/StatePreTxRecirculate.c	(.../StatePreTxRecirculate.c)	(revision 71a1673a75d7f63fd29554a8dbbec8daa7bff1ec)
@@ -38,8 +38,10 @@
 
 // ********** private definitions **********
 
-#define PRE_TX_RECIRC_BLOOD_FLOW_RATE_ML_MIN       100                                    ///< Blood pump flow rate during recirculation in mL/min.
-#define RECIRC_MEDIUM_TIME_MS                      ( 90 * SEC_PER_MIN * MS_PER_SECOND )   ///< Pre-Treatment recirc time before medium priority warning in milliseconds.
+#define PRE_TX_RECIRC_INITIAL_BLOOD_FLOW_RATE_ML_MIN     500                                   ///< Initial blood pump flow rate during recirculation in mL/min.
+#define PRE_TX_RECIRC_BLOOD_FLOW_RATE_ML_MIN             300                                   ///< Blood pump flow rate after the initial recirculation period in mL/min.
+#define PRE_TX_RECIRC_INITIAL_BLOOD_FLOW_TIME_MS         ( 30 * MS_PER_SECOND )                ///< Initial high blood flow duration in milliseconds.
+#define RECIRC_MEDIUM_TIME_MS                            ( 90 * SEC_PER_MIN * MS_PER_SECOND )  ///< Recirculation time before medium priority warning.
 
 /// Enumeration of Pre-Treatment Recirculation sub-states.
 typedef enum PreTxRecirculate_States
@@ -56,6 +58,7 @@
 
 static U32 preTxRecircStartTime;                                                ///< Recirculation start time (ms timer count).
 static BOOL recircMediumAlarmGiven;                                             ///< Flag indicating medium recirculation alarm has been raised.
+static BOOL initialBloodFlowComplete;                                           ///< Flag indicating the initial high blood flow period is complete.
 
 // ********** private function prototypes **********
 
@@ -72,15 +75,16 @@
  * @details \b Inputs: none.
  * @details \b Outputs: currentPreTxRecircState,
  * recircResumeRequested, preTxRecircStartTime,
- * recircMediumAlarmGiven.
+ * recircMediumAlarmGiven, initialBloodFlowComplete
  * @return none.
  *************************************************************************/
 void initPreTxRecirculate( void )
 {
-    currentPreTxRecircState = PRE_TX_RECIRCULATE_STATE;
-    recircResumeRequested   = FALSE;
-    preTxRecircStartTime    = getMSTimerCount();
-    recircMediumAlarmGiven  = FALSE;
+    currentPreTxRecircState  = PRE_TX_RECIRCULATE_STATE;
+    recircResumeRequested    = FALSE;
+    preTxRecircStartTime     = getMSTimerCount();
+    recircMediumAlarmGiven   = FALSE;
+    initialBloodFlowComplete = FALSE;
 }
 
 /*********************************************************************//**
@@ -181,16 +185,28 @@
  * @details \b Alarm: ALARM_ID_TD_PRIME_COMPLETED_MEDIUM if the
  * recirculation timeout expires.
  * @details \b Inputs: preTxRecircStartTime,
- * recircMediumAlarmGiven.
- * @details \b Outputs: recircMediumAlarmGiven.
+ * recircMediumAlarmGiven, initialBloodFlowComplete
+ * @details \b Outputs: recircMediumAlarmGiven, initialBloodFlowComplete
  * @return next Recirculate sub-state.
  *************************************************************************/
 static PRE_TX_RECIRCULATE_STATE_T handlePreTxRecirculateState( void )
 {
     PRE_TX_RECIRCULATE_STATE_T state = PRE_TX_RECIRCULATE_STATE;
 
+    if ( ( TRUE != initialBloodFlowComplete ) &&
+         ( TRUE == didTimeout( preTxRecircStartTime,
+                               PRE_TX_RECIRC_INITIAL_BLOOD_FLOW_TIME_MS ) ) )
+    {
+        setBloodPumpTargetFlowRate( PRE_TX_RECIRC_BLOOD_FLOW_RATE_ML_MIN,
+                                    MOTOR_DIR_FORWARD,
+                                    PUMP_CONTROL_MODE_OPEN_LOOP );
+
+        initialBloodFlowComplete = TRUE;
+    }
+
     if ( ( FALSE == recircMediumAlarmGiven ) &&
-         ( TRUE == didTimeout( preTxRecircStartTime, RECIRC_MEDIUM_TIME_MS ) ) )
+         ( TRUE == didTimeout( preTxRecircStartTime,
+                               RECIRC_MEDIUM_TIME_MS ) ) )
     {
         recircMediumAlarmGiven = TRUE;
         activateAlarmNoData( ALARM_ID_TD_PRIME_COMPLETED_MEDIUM );
@@ -249,8 +265,23 @@
     retractEjector();
     stopSyringePump();
 
-    setBloodPumpTargetFlowRate( PRE_TX_RECIRC_BLOOD_FLOW_RATE_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+    if ( ( TRUE == initialBloodFlowComplete ) ||
+         ( TRUE == didTimeout( preTxRecircStartTime,
+                               PRE_TX_RECIRC_INITIAL_BLOOD_FLOW_TIME_MS ) ) )
+    {
+        initialBloodFlowComplete = TRUE;
 
+        setBloodPumpTargetFlowRate( PRE_TX_RECIRC_BLOOD_FLOW_RATE_ML_MIN,
+                                    MOTOR_DIR_FORWARD,
+                                    PUMP_CONTROL_MODE_OPEN_LOOP );
+    }
+    else
+    {
+        setBloodPumpTargetFlowRate( PRE_TX_RECIRC_INITIAL_BLOOD_FLOW_RATE_ML_MIN,
+                                    MOTOR_DIR_FORWARD,
+                                    PUMP_CONTROL_MODE_OPEN_LOOP );
+    }
+
     // Direct DD to bypass dialyzer and perform no ultrafiltration
     cmdBypassDialyzer( TRUE );
     cmdChangeQuf( 0.0F );