What action should be taken if a patient found attempting self-harm leaves the Emergency Department?

In the scenario where a patient attempting self-harm leaves the Emergency Department, the most appropriate action is to notify hospital security immediately. This step is crucial because it ensures that trained personnel are involved in maintaining a safe environment for both the patient and others in the vicinity. Hospital security can search for the patient on the premises and provide assistance, as they are equipped to handle such sensitive situations.

While documentation and communication with the following shift are important for continuity of care, they do not directly address the immediate risk posed by the patient leaving the facility. Involving law enforcement may also be seen as excessive at this stage unless the situation escalates or poses an immediate danger to the patient or others. The priority should be to enlist security's help as they have the ability to react quickly and effectively to prevent potential harm.