The interrelation between the poisoning severity score COHb levels and outcome was assessed in the present study. As an unreliable laboratory result COHb levels may not be correlated with clinical severity and outcome. Higher mean delay time tachycardia bradypnia respiratory distress pulmonary edema lowest mean GCS hypernatremia leucocytosis acidosis hyperglycemia high levels of CPK- MB AST and cTnI ECG