Index: sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateStack.qml
===================================================================
diff -u -r108450c58851ff7c48c4607494b8cdae59952908 -r6f73e3ec5ba15c5c6ecc59191462e64e3bc36dfc
--- sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateStack.qml	(.../PreTreatmentCreateStack.qml)	(revision 108450c58851ff7c48c4607494b8cdae59952908)
+++ sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateStack.qml	(.../PreTreatmentCreateStack.qml)	(revision 6f73e3ec5ba15c5c6ecc59191462e64e3bc36dfc)
@@ -72,6 +72,9 @@
             }
             textInput.inputMethodHints  : Qt.ImhPreferLowercase
             textInput.echoMode          : TextInput.Normal
+            textInput.validator         : RegExpValidator {
+                regExp: Variables.regExp_PatientID
+            }
         }
     }