Index: HDDefs.h
===================================================================
diff -u -rc2295db524026ddd7218bc1be7cacd73919d75eb -red841bc5e829d8377e799b9bada6df534b30f88a
--- HDDefs.h	(.../HDDefs.h)	(revision c2295db524026ddd7218bc1be7cacd73919d75eb)
+++ HDDefs.h	(.../HDDefs.h)	(revision ed841bc5e829d8377e799b9bada6df534b30f88a)
@@ -330,6 +330,24 @@
 /**@}*/
 
 /**
+ *  @addtogroup HDPreTreatmentMode
+ *  @{
+ */
+
+/// Enumeration of pre-treatment patient connect states.
+enum HD_Pre_Treatment_Pat_Conn_States
+{
+    PRE_TREATMENT_PAT_CONN_WAIT_FOR_UF_VOL_STATE = 0,               ///< Pre-treatment patient connect wait for UF volume setting state
+    PRE_TREATMENT_PAT_CONN_WAIT_FOR_DLZR_INVERT_STATE,              ///< Pre-treatment patient connect wait for dialyzer inverted state
+    PRE_TREATMENT_PAT_CONN_WAIT_FOR_TREATMENT_START_STATE,          ///< Pre-treatment patient connect wait for treatment start state
+    NUM_OF_PRE_TREATMENT_PAT_CONN_STATES                            ///< Number of pre-treatment patient connect states
+};
+///< Type for HD pre-treatment recirculate sub-mode states enumeration
+typedef enum HD_Pre_Treatment_Pat_Conn_States HD_PRE_TREATMENT_PAT_CONN_STATE_T;
+
+/**@}*/
+
+/**
  *  @addtogroup HDTreatmentMode
  *  @{
  */