The definition or classification of<unk>  can also change based on the setting the patient is present in as well. For example in a mass casualty setting triaging a patient as "black" or dead, is done purely on the basis of responsiveness and spontaneous circulation and ventilation. 
Note there is a distinction between pronouncing and certifying<unk> . The former means assessing the patient and<unk> g<unk> , whereas certifying<unk>  typically involves stating the cause of<unk>  as well.
Diagnosis of death
Asystole
Sign out tools
Brain death
Critical care documentation
PEA
Reexamination sample documentation
Drug overdose