Index: HDDefs.h
===================================================================
diff -u -r01c50667ec8135098adb6442639fd2044a2161ec -rea3bf36d20d92e24829b2816bd4cc486dde3ef2b
--- HDDefs.h	(.../HDDefs.h)	(revision 01c50667ec8135098adb6442639fd2044a2161ec)
+++ HDDefs.h	(.../HDDefs.h)	(revision ea3bf36d20d92e24829b2816bd4cc486dde3ef2b)
@@ -314,6 +314,37 @@
 };
 typedef enum Bicarb_Concentrates BICARB_CONCENTRATE_TYPE_T;             ///< Type for bicarbonate concentrates enumeration
 
+/// Enumeration of heparin states.
+enum Heparin_States
+{
+    HEPARIN_STATE_OFF = 0,                                              ///< No heparin delivery is in progress
+    HEPARIN_STATE_PAUSED,                                               ///< Heparin delivery paused
+    HEPARIN_STATE_INITIAL_BOLUS,                                        ///< Initial heparin bolus delivery in progress
+    HEPARIN_STATE_DISPENSING,                                           ///< Gradual heparin dispensing in progress
+    HEPARIN_STATE_COMPLETED,                                            ///< Heparin delivery stopped due to the set stop time before treatment end
+    HEPARIN_STATE_EMPTY,                                                ///< Heparin Syringe empty
+    NUM_OF_HEPARIN_STATES                                               ///< Number of saline bolus states
+};
+typedef enum Heparin_States HEPARIN_STATE_T; ///< Type for heparin state enumeration
+
+/// Enumeration of heparin command IDs.
+enum Heparin_Commands
+{
+    HEPARIN_CMD_PAUSE = 0,                                              ///< Pause Heparin command
+    HEPARIN_CMD_RESUME,                                                 ///< Resume Heparin command
+    NUM_OF_HEPARIN_CMDS                                                 ///< Number of Heparin commands
+};
+typedef enum Heparin_Commands HEPARIN_CMD_T;                            ///< Type for  HEPARIN command IDs enumeration
+
+/// Enumeration of start/stop command parameters.
+enum Saline_Commands
+{
+    SALINE_CMD_STOP = 0,                                                ///< Start command
+    SALINE_CMD_START,                                                   ///< Stop command
+    NUM_OF_SALINE_CMDS                                                  ///< Number of start/stop command parameters
+};
+typedef enum Saline_Commands SALINE_CMD_T;                              ///< Type for saline command enum.
+
 /**@}*/
 
 #endif