I General criteria

Brain death can only be certified when the irreversible loss of brainstem function is verified

II Preconditions

The following conditions must be fulfilled cumulatively for the diagnosis of brain death:
1) Verification of the cause of the clinical condition and the irreversibility thereof;
2) State of deep coma with no motor response to painful stimuli in any part of the cranial nerve area;
3) Absence of spontaneous breathing;
4) Confirmation of hemodynamic stability and the exclusion of hypothermia, metabolic disturbances or medication factors that could be responsible for the suppression of the functions referred to in the previous points.

III Criteria for determination

1. The determination of brain death requires the total absence of the following brainstem reflexes:
1) Pupillary light reflex;
2) Oculocephalic reflex;
3) Vestibulo-ocular reflex;
4) Corneal reflex;
5) Pharyngeal reflex.

2. No spontaneous breathing is verified in examinations.