Index: firmware/App/Controllers/SyringePump.c
===================================================================
diff -u -rec4abf209e338090e861defd54e38b692d85e2b1 -r943c6072dae3678dbba29f9b63035d44139ea1cf
--- firmware/App/Controllers/SyringePump.c	(.../SyringePump.c)	(revision ec4abf209e338090e861defd54e38b692d85e2b1)
+++ firmware/App/Controllers/SyringePump.c	(.../SyringePump.c)	(revision 943c6072dae3678dbba29f9b63035d44139ea1cf)
@@ -1113,6 +1113,7 @@
     syringePumpPosition.data = encPosition - syringePumpHomePositionOffset;
     // Calculate volume delivered from position
     syringePumpVolumeDelivered.data = (F32)( syringePumpPosition.data - syringePumpVolumeStartPosition ) / SYRINGE_ENCODER_COUNTS_PER_ML;
+    syringePumpVolumeDelivered.data = ( syringePumpVolumeDelivered.data < 0.0F ? 0.0F : syringePumpVolumeDelivered.data );
     calcSafetyVolumeDelivered();
     // Calculate measured rate (mL/hr)
     calcMeasRate();
Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -r82bd1d24c050e79690a7f5b236e49dd7db7e2a91 -r943c6072dae3678dbba29f9b63035d44139ea1cf
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 82bd1d24c050e79690a7f5b236e49dd7db7e2a91)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 943c6072dae3678dbba29f9b63035d44139ea1cf)
@@ -148,6 +148,7 @@
     resetPreLoadStatus();
     setVenousBubbleDetectionEnabled( FALSE );
     setCurrentSubState( NO_SUB_STATE );
+    clearNoRetriggerFlag();
 
     // Set user alarm recovery actions allowed in this mode
     setAlarmUserActionEnabled( ALARM_USER_ACTION_RESUME, FALSE );
Index: firmware/App/Services/AlarmMgmt.c
===================================================================
diff -u -r069e667671a8732eb9373acf8fcc6d3c9cc1c6b9 -r943c6072dae3678dbba29f9b63035d44139ea1cf
--- firmware/App/Services/AlarmMgmt.c	(.../AlarmMgmt.c)	(revision 069e667671a8732eb9373acf8fcc6d3c9cc1c6b9)
+++ firmware/App/Services/AlarmMgmt.c	(.../AlarmMgmt.c)	(revision 943c6072dae3678dbba29f9b63035d44139ea1cf)
@@ -142,6 +142,7 @@
 
 static BOOL alarmAudioTestToneRequested;                                            ///< Flag indicates whether alarm audio test tone should be output.
 static BOOL resumeBlockedByAlarmProperty;                                           ///< Flag indicates whether treatment resumption is currently blocked by alarm property.
+static BOOL alarmNoRetrigger;                                                       ///< Flag indicates whether some alarms should be prevented from re-triggering after being cleared by rinseback or end-tx options
 
 // ********** private function prototypes **********
 
@@ -154,7 +155,7 @@
 static void updateAlarmsSilenceStatus( void );
 static void updateAlarmsFlags( void );
 
-static void clearAllRecoverableAlarms( void );
+static void clearAllRecoverableAlarms( ALARM_USER_ACTION_T action );
 static void resetAlarmPriorityFIFO( ALARM_PRIORITY_T priority );
 
 static U32  getAlarmStartTime( ALARM_ID_T alarmID );
@@ -222,6 +223,7 @@
     alarmsBlockedTimer = 0;
     alarmAudioTestToneRequested = FALSE;
     resumeBlockedByAlarmProperty = FALSE;
+    alarmNoRetrigger = FALSE;
     alarmAudioSelfTestState = ALARM_AUDIO_SELF_TEST_STATE_START;
 }
 
@@ -371,7 +373,7 @@
                 || ( ALARM_ID_HD_AC_POWER_LOST_IN_TREATMENT == alarm ) )
         {
             // Broadcast alarm and data if alarm not already active
-            if ( FALSE == alarmIsActive[ alarm ] )
+            if ( ( FALSE == alarmIsActive[ alarm ] ) && ( FALSE == alarmNoRetrigger ) )
             {
                 ALARM_TRIGGERED_PAYLOAD_T data;
 
@@ -463,6 +465,18 @@
     {
         SET_ALARM_WITH_2_U32_DATA( ALARM_ID_HD_SOFTWARE_FAULT, SW_FAULT_ID_ALARM_MGMT_INVALID_ALARM_TO_CLEAR, alarm )
     }
+}
+
+/*********************************************************************//**
+ * @brief
+ * The clearNoRetriggerFlag function clears the no re-trigger flag.
+ * @details Inputs: none
+ * @details Outputs:
+ * @return none
+ *************************************************************************/
+void clearNoRetriggerFlag( void )
+{
+    alarmNoRetrigger = FALSE;
 }
 
 /*********************************************************************//**
@@ -530,7 +544,7 @@
  *************************************************************************/
 void signalAlarmUserActionInitiated( ALARM_USER_ACTION_T action )
 {
-    // Validate given action
+    // Clear recoverable alarms on user action
     if ( ( action < NUMBER_OF_ALARM_USER_ACTIONS ) && ( action != ALARM_USER_ACTION_END_TREATMENT ) )  // end tx action must be confirmed first
     {
         ALARM_ID_T a = alarmStatus.alarmTop;
@@ -545,12 +559,12 @@
             // Otherwise we must be in mode/state where ack was only option - so clear all like other options
             else
             {
-                clearAllRecoverableAlarms();
+                clearAllRecoverableAlarms( action );
             }
         }
         else
         {
-            clearAllRecoverableAlarms();
+            clearAllRecoverableAlarms( action );
         }
     }
 
@@ -881,7 +895,7 @@
     // Check for user confirmation of end treatment alarm response
     if ( CONFIRMATION_REQUEST_STATUS_ACCEPTED == getConfirmationRequestStatus( GENERIC_CONFIRM_ID_TREATMENT_END ) )
     {
-        clearAllRecoverableAlarms();
+        clearAllRecoverableAlarms( ALARM_USER_ACTION_END_TREATMENT );
         initiateAlarmAction( ALARM_ACTION_END_TREATMENT );
     }
 
@@ -1133,7 +1147,7 @@
     BOOL stop = FALSE;
     BOOL noClear = FALSE;
     BOOL noResume = FALSE;
-    BOOL noResumePerAlarmPropertyOnly = FALSE;
+    BOOL noResumePerAlarmPropertyOnly = alarmNoRetrigger;  // cannot resume if no re-trigger flag is set
     BOOL noRinseback = FALSE;
     BOOL noEndTreatment = FALSE;
     BOOL usrAckReq = FALSE;
@@ -1240,10 +1254,11 @@
  * The clearAllRecoverableAlarms function clears all currently active
  * recoverable alarms.
  * @details Inputs: ALARM_TABLE[]
- * @details Outputs: All currently active recoverable alarms are cleared
+ * @details Outputs: alarmNoRetrigger, alarmIsActive[]
+ * @param action user action that prompted clearing of recoverable alarms
  * @return none
  *************************************************************************/
-static void clearAllRecoverableAlarms( void )
+static void clearAllRecoverableAlarms( ALARM_USER_ACTION_T action )
 {
     ALARM_ID_T a;
 
@@ -1254,6 +1269,14 @@
         // Clear alarm if alarm allowed to be cleared and not clear only (those are cleared individually)
         if ( ( FALSE == ALARM_TABLE[ a ].alarmNoClear ) && ( FALSE == ALARM_TABLE[ a ].alarmClearOnly ) )
         {
+            if ( ( ALARM_USER_ACTION_RINSEBACK == action ) && ( TRUE == ALARM_TABLE[ a ].alarmNoRetrigOnRB ) )
+            {
+                alarmNoRetrigger = TRUE;
+            }
+            else if ( ( ALARM_USER_ACTION_END_TREATMENT == action ) && ( TRUE == ALARM_TABLE[ a ].alarmNoRetrigOnEndTx ) )
+            {
+                alarmNoRetrigger = TRUE;
+            }
             clearAlarm( a );
         }
     }
Index: firmware/App/Services/AlarmMgmt.h
===================================================================
diff -u -r12708a04ae3365e11180182fc52d005c229a7bc6 -r943c6072dae3678dbba29f9b63035d44139ea1cf
--- firmware/App/Services/AlarmMgmt.h	(.../AlarmMgmt.h)	(revision 12708a04ae3365e11180182fc52d005c229a7bc6)
+++ firmware/App/Services/AlarmMgmt.h	(.../AlarmMgmt.h)	(revision 943c6072dae3678dbba29f9b63035d44139ea1cf)
@@ -198,6 +198,7 @@
 void activateAlarm2Data( ALARM_ID_T alarm, ALARM_DATA_T alarmData1, ALARM_DATA_T alarmData2 );
 void clearAlarm( ALARM_ID_T alarm );
 void clearAlarmCondition( ALARM_ID_T alarm );
+void clearNoRetriggerFlag( void );
 void setAlarmUserActionEnabled( ALARM_USER_ACTION_T action, BOOL enabled );
 void signalAlarmSilence( ALARM_SILENCE_CMD_T cmd );
 void signalAlarmUserActionInitiated( ALARM_USER_ACTION_T action );