#HEAD casualty /asphyxia & choking /Cerebro Vascular accident Caused by bleeding into brain (mainly brain stem). This causes damage to the center which controls breathing. $2 DIAGNOSIS: Sudden onset, absence of respiration, {pupils} often pin point & non reactive to light, pupils may be {dilated} & non reactive to light, skin color pale, lips blue or {cyanosed}. TREATMENT: Call for medical assistance urgently. Free clothing around neck. Maintain {airway}.