Index: dialin/hd/treatment.py
===================================================================
diff -u -r9dee83286969ac19c09f6879394494e551663cb5 -rc45a42475147641810dd252aefcd2c7872f13c7f
--- dialin/hd/treatment.py	(.../treatment.py)	(revision 9dee83286969ac19c09f6879394494e551663cb5)
+++ dialin/hd/treatment.py	(.../treatment.py)	(revision c45a42475147641810dd252aefcd2c7872f13c7f)
@@ -80,6 +80,13 @@
     SALINE_BOLUS_STATE_IN_PROGRESS = 2                  # A saline bolus delivery is in progress
     SALINE_BOLUS_STATE_MAX_DELIVERED = 3                # Maximum saline bolus volume reached
 
+    # Dialyzer Re-Prime states
+    DIALYZER_REPRIME_STATE_DIALYSATE_PUMPS_OFF = 0      # Turn off dialysate pumps and wait for them to stop
+    DIALYZER_REPRIME_STATE_PURGE_PRIOR_1 = 1            # Purge air from an interrupted reprime
+    DIALYZER_REPRIME_STATE_PURGE_PRIOR_2 = 2            # Purge air from an interrupted reprime
+    DIALYZER_REPRIME_STATE_REPRIME = 3                  # Remove air from dialyzer
+    DIALYZER_REPRIME_STATE_PURGE_LINES = 4              # Purge air from lines after repriming dialyzer
+
     def __init__(self, can_interface, logger: Logger):
         """
         HDTreatment constructor
@@ -140,6 +147,7 @@
         self.treatment_end_state = 0
         self.treatment_stop_state = 0
         self.dialysis_state = 0
+        self.dialyzer_reprime_state = 0
         # saline bolus status
         self.saline_bolus_max_vol = 0
         self.saline_bolus_cum_vol = 0.0
@@ -327,6 +335,14 @@
         """
         return self.dialysis_state
 
+    def get_dialyzer_reprime_state(self) -> int:
+        """
+        Gets the current treatment dialyzer re-prime state
+
+        @return: The current treatment dialyzer re-prime state ID
+        """
+        return self.dialyzer_reprime_state
+
     def get_saline_bolus_max_volume(self) -> int:
         """
         Returns maximum volume (in mL) saline that can be delivered to a patient
@@ -509,7 +525,8 @@
         "blood_prime_state",
         "treatment_end_state",
         "treatment_stop_state",
-        "dialysis_state"
+        "dialysis_state",
+        "dialyzer_reprime_state"
     ])
     def _handler_treatment_state_sync(self, message, timestamp=0.0):
         """
@@ -540,6 +557,8 @@
             message['message'][MsgFieldPositions.START_POS_FIELD_9:MsgFieldPositions.END_POS_FIELD_9]))
         dia = struct.unpack('i', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_10:MsgFieldPositions.END_POS_FIELD_10]))
+        drp = struct.unpack('i', bytearray(
+            message['message'][MsgFieldPositions.START_POS_FIELD_11:MsgFieldPositions.END_POS_FIELD_11]))
 
         self.treatment_state = tst[0]
         self.treatment_uf_state = ufs[0]
@@ -551,6 +570,7 @@
         self.treatment_end_state = txe[0]
         self.treatment_stop_state = txs[0]
         self.dialysis_state = dia[0]
+        self.dialyzer_reprime_state = drp[0]
         self.hd_treatment_state_timestamp = timestamp
 
     @publish([
Index: dialin/ui/dg_simulator.py
===================================================================
diff -u -r9dee83286969ac19c09f6879394494e551663cb5 -rc45a42475147641810dd252aefcd2c7872f13c7f
--- dialin/ui/dg_simulator.py	(.../dg_simulator.py)	(revision 9dee83286969ac19c09f6879394494e551663cb5)
+++ dialin/ui/dg_simulator.py	(.../dg_simulator.py)	(revision c45a42475147641810dd252aefcd2c7872f13c7f)
@@ -7,8 +7,8 @@
 #
 # @file    dg_simulator.py
 #
-# @author  (last)      Micahel Garthwaite
-# @date    (last)      08-Mar-2023
+# @author  (last)      Dara Navaei
+# @date    (last)      16-Mar-2023
 # @author  (original)  Peter Lucia
 # @date    (original)  16-Mar-2021
 #
Index: tests/dg_tests.py
===================================================================
diff -u -r0a1976149ea9be0e1593e76d4bd242dfa1a69f7f -rc45a42475147641810dd252aefcd2c7872f13c7f
--- tests/dg_tests.py	(.../dg_tests.py)	(revision 0a1976149ea9be0e1593e76d4bd242dfa1a69f7f)
+++ tests/dg_tests.py	(.../dg_tests.py)	(revision c45a42475147641810dd252aefcd2c7872f13c7f)
@@ -8,7 +8,7 @@
 # @file    dg_tests.py
 #
 # @author  (last)      Dara Navaei
-# @date    (last)      03-Feb-2023
+# @date    (last)      16-Mar-2023
 # @author  (original)  Dara Navaei
 # @date    (original)  16-Jan-2022
 #
Index: tests/hd_nvm_scripts.py
===================================================================
diff -u -r0a1976149ea9be0e1593e76d4bd242dfa1a69f7f -rc45a42475147641810dd252aefcd2c7872f13c7f
--- tests/hd_nvm_scripts.py	(.../hd_nvm_scripts.py)	(revision 0a1976149ea9be0e1593e76d4bd242dfa1a69f7f)
+++ tests/hd_nvm_scripts.py	(.../hd_nvm_scripts.py)	(revision c45a42475147641810dd252aefcd2c7872f13c7f)
@@ -8,7 +8,7 @@
 # @file    hd_nvm_scripts.py
 #
 # @author  (last)      Dara Navaei
-# @date    (last)      21-Dec-2022
+# @date    (last)      16-Mar-2023
 # @author  (original)  Dara Navaei
 # @date    (original)  10-Feb-2022
 #