Supreme Healthcare Management Services Debriefing and defusing Interventions are provided within the first 24 to 72 hours after the initial impact of the critical event. The length of time between exposure to the event and CISD increases, the least effective CISD becomes. Therefore a close temporal (time) relationship between the critical incident and defusing and initial debriefing is crucial and imperative for CISM service delivery to be most beneficial and effective. CISM is a process used to help victims of traumatic event avoid long-term mental health issues. Offering victims the opportunity to share similar experiences in a supportive environment reduces the likelihood for imprinting of the experiences to take place. This means that long term mental health issues such as acute stress disorder and post traumatic disorder can be prevented.