Index: firmware/App/Controllers/DGInterface.c
===================================================================
diff -u -rd91a24c730aeb5cd7e3eba9ef4eca78e442911f8 -r515a40fb83e3fc13384dae12dba25b45aeeea904
--- firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision d91a24c730aeb5cd7e3eba9ef4eca78e442911f8)
+++ firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 515a40fb83e3fc13384dae12dba25b45aeeea904)
@@ -141,8 +141,11 @@
     U32 msSinceLastVolumeCalc = calcTimeSince( resUseTimer );
     F32 flowRateMlPerMs = (F32)getTargetDialInFlowRate() / (F32)( MS_PER_SECOND * SEC_PER_MIN );
 
-    // calculate volume used from active reservoir
-    resUseVolumeMl += ( flowRateMlPerMs * msSinceLastVolumeCalc );  // TODO - should this calc be done and kept by Dialysis sub-mode?
+    // calculate volume used from active reservoir - do not accumulate if saline bolus in progress
+    if ( SALINE_BOLUS_STATE_IN_PROGRESS == getSalineBolusState() )
+    {
+        resUseVolumeMl += ( flowRateMlPerMs * msSinceLastVolumeCalc );  // TODO - should this calc be done and kept by Dialysis sub-mode?
+    }
     resUseTimer = getMSTimerCount();
 
     // treatment reservoir mgmt. state machine