Index: sources/gui/qml/components/HeaderBar.qml
===================================================================
diff -u -r9ea6aa3bf4e8c4b5ef8970a6c19ad12b5765c58d -rbe918124565d9f0add371e25782804f19e0cba17
--- sources/gui/qml/components/HeaderBar.qml	(.../HeaderBar.qml)	(revision 9ea6aa3bf4e8c4b5ef8970a6c19ad12b5765c58d)
+++ sources/gui/qml/components/HeaderBar.qml	(.../HeaderBar.qml)	(revision be918124565d9f0add371e25782804f19e0cba17)
@@ -114,8 +114,7 @@
             iconSize        : Variables.headerIconDiameter
             iconImageSource : "qrc:/images/iPrescription"
             extraSpace      : _headerButtonRow.spacing
-            visible         : vTDOpMode.validateParameters  ||
-                              vTDOpMode.preTreatment        ||
+            visible         : vTDOpMode.preTreatment        ||
                               vTDOpMode.inTreatment         ||
                               vTDOpMode.postTreatment
 
Index: sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateContent.qml
===================================================================
diff -u -rcc7aae88f15228ff37b840946818692e444718bf -rbe918124565d9f0add371e25782804f19e0cba17
--- sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateContent.qml	(.../PreTreatmentCreateContent.qml)	(revision cc7aae88f15228ff37b840946818692e444718bf)
+++ sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateContent.qml	(.../PreTreatmentCreateContent.qml)	(revision be918124565d9f0add371e25782804f19e0cba17)
@@ -64,9 +64,6 @@
         _heparinDispensingRateControl   .refresh()
         _heparinBolusVolumeControl      .refresh()
         _heparinStopTimeControl         .refresh()
-        _acidConcentrateComboBox        .refresh()
-        _bicarbonateConcentrateComboBox .refresh()
-        _dialyzerTypeComboBox           .refresh()
         _dialysateTemperatureControl    .refresh()
         _salineBolusVolumeControl       .refresh()
         _bpMeasurementIntervalControl   .refresh()