Index: leahi_dialin/td/modules/blood_flow.py
===================================================================
diff -u -rec8a2600b9e8cf6fe7e02c200a1c24221ca86863 -r43fec7787f9a4115d19deeb5cbc1d7bbf23134fe
--- leahi_dialin/td/modules/blood_flow.py	(.../blood_flow.py)	(revision ec8a2600b9e8cf6fe7e02c200a1c24221ca86863)
+++ leahi_dialin/td/modules/blood_flow.py	(.../blood_flow.py)	(revision 43fec7787f9a4115d19deeb5cbc1d7bbf23134fe)
@@ -383,6 +383,30 @@
             self.logger.debug("Timeout!!!!")
             return False
 
+    def cmd_hard_stop_blood_pump(self) -> int:
+        """
+        Constructs and sends hard stop blood pump command.
+        Constraints:
+            Must be logged into TD.
+
+        @return: 1 if successful, zero otherwise
+        """
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_td_ch_id,
+                                              message_id=MsgIds.MSG_ID_TD_HARD_STOP_BLOOD_PUMP.value)
+
+        self.logger.debug("Hard stopping blood pump")
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content...
+        if received_message is not None:
+            # response payload is OK or not OK
+            return True
+        else:
+            self.logger.debug("Timeout!!!!")
+            return False
+
     def cmd_blood_flow_alpha_y_intercept_override(self, intercept: float, reset: int = NO_RESET) -> int:
         """
         Constructs and sends the blood flow alpha y intercept override.