Index: firmware/App/Modes/StatePreTxHeparinSetup.c
===================================================================
diff -u -r6bb89ac52fecee7db9dc69a3eb727cad0a66370e -r069dee3a2428d3c6bb281db1844a372ae6e2063a
--- firmware/App/Modes/StatePreTxHeparinSetup.c	(.../StatePreTxHeparinSetup.c)	(revision 6bb89ac52fecee7db9dc69a3eb727cad0a66370e)
+++ firmware/App/Modes/StatePreTxHeparinSetup.c	(.../StatePreTxHeparinSetup.c)	(revision 069dee3a2428d3c6bb281db1844a372ae6e2063a)
@@ -438,8 +438,10 @@
 /*********************************************************************//**
  * @brief
  * The handlePreTxHeparinPausedState function handles the paused state.
- * @details \b Inputs: none
- * @details \b Outputs: Next pre-treatment heparin setup state.
+ * @details \b Inputs: heparinSetupResumeRequested,
+ * interruptedPreTxHeparinSetupState
+ * @details \b Outputs: Next pre-treatment heparin setup state and
+ * syringe pump operation.
  * @return Current or next pre-treatment heparin setup state.
  *************************************************************************/
 static PRE_TX_HEPARIN_SETUP_STATE_T handlePreTxHeparinPausedState( void )
@@ -448,33 +450,32 @@
 
     if ( TRUE == heparinSetupResumeRequested )
     {
-        // Resume from Preload, Await Syringe Load Confirmation, or Seek by
-        // retracting the syringe and restarting the preload sequence.
-        if ( ( PRE_TX_HEPARIN_SETUP_PRELOAD_STATE == interruptedPreTxHeparinSetupState ) ||
-             ( PRE_TX_HEPARIN_SETUP_AWAIT_SYRINGE_LOAD_CONFIRMATION_STATE == interruptedPreTxHeparinSetupState ) ||
-             ( PRE_TX_HEPARIN_SETUP_SEEK_STATE == interruptedPreTxHeparinSetupState ) )
+        switch ( interruptedPreTxHeparinSetupState )
         {
-            retractSyringePump();
-            state = PRE_TX_HEPARIN_SETUP_PRELOAD_STATE;
-        }
-        else
-        {
-            // Resume from the interrupted state after the alarm is cleared.
-            state = interruptedPreTxHeparinSetupState;
+            // If interrupted before Seek is complete, retract the syringe
+            // and restart the heparin setup sequence from Preload.
+            case PRE_TX_HEPARIN_SETUP_PRELOAD_STATE:
+            case PRE_TX_HEPARIN_SETUP_AWAIT_SYRINGE_LOAD_CONFIRMATION_STATE:
+            case PRE_TX_HEPARIN_SETUP_SEEK_STATE:
+                retractSyringePump();
+                state = PRE_TX_HEPARIN_SETUP_PRELOAD_STATE;
+                break;
 
-            switch ( state )
-            {
-                case PRE_TX_HEPARIN_SETUP_PRIME_STATE:
-                case PRE_TX_HEPARIN_SETUP_OCCLUSION_CHECK_STATE:
-                case PRE_TX_HEPARIN_SETUP_BOLUS_STATE:
-                    setupPreTxHeparinState( state );
-                    break;
+            // If interrupted after Seek is complete, resume from the
+            // heparin setup state that was active before the alarm.
+            case PRE_TX_HEPARIN_SETUP_PRIME_STATE:
+            case PRE_TX_HEPARIN_SETUP_OCCLUSION_CHECK_STATE:
+            case PRE_TX_HEPARIN_SETUP_BOLUS_STATE:
+                state = interruptedPreTxHeparinSetupState;
+                setupPreTxHeparinState( state );
+                break;
 
-                default:
-                    SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_SOFTWARE_FAULT, SW_FAULT_ID_TD_INVALID_PRE_TX_HEPARIN_SETUP_STATE, interruptedPreTxHeparinSetupState );
-                    state = PRE_TX_HEPARIN_SETUP_PAUSED_STATE;
-                    break;
-            }
+            // An unexpected interrupted state indicates a software fault.
+            default:
+                SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_SOFTWARE_FAULT, SW_FAULT_ID_TD_INVALID_PRE_TX_HEPARIN_SETUP_STATE, interruptedPreTxHeparinSetupState );
+
+                state = PRE_TX_HEPARIN_SETUP_PAUSED_STATE;
+                break;
         }
     }