Index: HDDefs.h
===================================================================
diff -u -r744569f5f158194d189dfdf139c45b18fb6f6bd4 -r8fa3f1f8c48ec55b873afa9ccbf80685389529eb
--- HDDefs.h	(.../HDDefs.h)	(revision 744569f5f158194d189dfdf139c45b18fb6f6bd4)
+++ HDDefs.h	(.../HDDefs.h)	(revision 8fa3f1f8c48ec55b873afa9ccbf80685389529eb)
@@ -141,12 +141,29 @@
     PRE_TREATMENT_PATIENT_CONNECTION_STATE,                              ///< Patient connection state
     NUM_OF_PRE_TREATMENT_STATES                                          ///< Number of pre-treatment mode states
 };
-typedef enum Pre_Treatment_Mode_States PRE_TREATMENT_MODE_STATE_T;       ///< Type for HD pre-treatment mode states enumeration
+typedef enum Pre_Treatment_Mode_States PRE_TREATMENT_MODE_STATE_T;       ///< Type for HD pre-treatment mode states enumeration
+
+/**@}*/
 
+/**
+ *  @addtogroup Prime
+ *  @{
+ */
 
+/// Enumeration of prime sub-mode states.
+enum Pre_Treatment_Prime_States
+{
+    PRIME_START_STATE = 0,                                              ///< Prime start state
+    PRIME_SALINE_SETUP_STATE,                                           ///< Saline setup state
+    PRIME_SALINE_PURGE_AIR_STATE,                                       ///< Saline purge air state
+    PRIME_SALINE_CIRC_BLOOD_CIRCUIT_STATE,                              ///< Circulate blood circuit state
+    PRIME_DIALYSATE_DIALYZER_STATE,                                     ///< Dialysate dialyzer state
+    NUM_OF_PRIME_STATES                                                 ///< Number of prime sub-mode states
+};
+typedef enum Pre_Treatment_Prime_States PRE_TREATMENT_PRIME_STATE_T;    ///< Type for HD pre-treatment prime sub-mode states enumeration
+
+/**@}*/
 
-/**@}*/
-
 /**
  *  @addtogroup HDTreatmentMode
  *  @{