Index: HDDefs.h
===================================================================
diff -u -rf5bb93a6304dc4cf058b28688eb3464f91c92d60 -r2ae479b6b85b6d6ec70547f54edfc32b59c3cef2
--- HDDefs.h	(.../HDDefs.h)	(revision f5bb93a6304dc4cf058b28688eb3464f91c92d60)
+++ HDDefs.h	(.../HDDefs.h)	(revision 2ae479b6b85b6d6ec70547f54edfc32b59c3cef2)
@@ -8,7 +8,7 @@
 * @file    HDDefs.h
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      05-Mar-2024
+* @date    (last)      01-Nov-2024
 *
 * @author  (original)  Sean Nash
 * @date    (original)  29-May-2020
@@ -396,12 +396,26 @@
  *  @{
  */
 
+/// Blood leak zeroing states
+enum Blood_Leak_Zeroing_States
+{
+    BLD_ZEROING_IDLE_STATE = 0,                         ///< Blood leak zeroing idle state.
+    BLD_ZEROING_FLUSH_RSRVR_2_DPI_STATE,                ///< Blood leak zeroing flush reservoir to DPi state.
+    BLD_ZEROING_FLUSH_DPI_2_BLD_STATE,                  ///< Blood leak zeroing flush DPi to BLD state.
+    BLD_ZEROING_ZERO_STATE,                             ///< Blood leak zeroing zero state.
+    BLD_ZEROING_VERIFY_ZEROING_STATE,                   ///< Blood leak zeroing verify zeroing state.
+    BLD_ZEROING_COMPLETE_STATE,                         ///< Blood leak zeroing complete state.
+    NUM_OF_BLD_ZEROING_STATES                           ///< Number of blood leak zeroing states.
+};
+typedef enum Blood_Leak_Zeroing_States BLOOD_LEAK_ZEROING_STATE_T;
+
 /// Enumeration of dialysis sub-mode states.
 enum Dialysis_States
 {
     DIALYSIS_START_STATE = 0,                           ///< Start state of the dialysis sub-mode state machine
     DIALYSIS_UF_STATE,                                  ///< Ultrafiltration state of the dialysis sub-mode state machine
     DIALYSIS_SALINE_BOLUS_STATE,                        ///< Saline bolus state of the dialysis sub-mode state machine
+    DIALYSIS_BLOOD_LEAK_ZEROING_STATE,                  ///< Blood leak zeroing state of the dialysis sub-mode state machine
     NUM_OF_DIALYSIS_STATES                              ///< Number of dialysis sub-mode states
 };
 typedef enum Dialysis_States DIALYSIS_STATE_T;          ///< Type for dialysis states enumeration
@@ -764,6 +778,8 @@
     HD_EVENT_DRY_SELF_TEST_PRESSURE_DECAY_WAIT_PERIOD,                  ///< HD dry self test pressure decay waiting period.
     HD_EVENT_INSTIT_RECORD_UPDATE,                                      ///< HD new institutional record has been updated.
     HD_EVENT_PARTIAL_OCCLUSION_BASELINE,                                ///< HD event partial occlusion baseline event
+    HD_EVENT_BLOOD_LEAK_ZEROING_REQUEST,                                ///< HD event blood leak zeroing request.
+    HD_EVENT_BLOOD_LEAK_ZEROING_REQUIRED,                               ///< HD event blood leak zeroing required.
     NUM_OF_EVENT_IDS                                                    ///< Total number of HD events
 };
 typedef enum HD_Event_List HD_EVENT_ID_T;                               ///< Type for HD event list enumeration