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Table 2 Call Event Codes and Times

From: Protocol: simulation training to improve 9-1-1 dispatcher identification of cardiac arrest

Code Interaction Definition
C First consciousness question The first time the dispatcher asks a question that attempts to measure patient’s consciousness status.
B First breathing question The first time the dispatcher asks a question that attempts to measure patient’s breathing status.
TRAN Transition from All-Caller questions to pre-arrival instructions The point in the call where the dispatcher closes the all-caller interview and verbalizes the transition to T-CPR. This verbalization can be (1) the statement of the need for T-CPR, or (2) the start of actual T-CPR instructions.
INST T-CPR instructions The first time the dispatcher gives the actor a T-CPR instruction command.