[Clinical manifestations]
1. Mild (blood COHb content is 10%~20%) headache, dizziness, tinnitus, nausea, vomiting, palpitations, limb weakness or transient syncope. After leaving the poisoned environment and breathing in fresh air, the symptoms can disappear quickly.
2. Moderate (blood COHB content is 30% to 40%). In addition to the aggravation of the above symptoms, a shallower degree of coma occurs. The patient's face is flushed, his lips and skin are cherry red, his pulse is fast, he sweats, and he is irritable.
3. Severe (blood COHb content above 50%). In addition to the above symptoms, it is often complicated by pulmonary edema, cerebral edema, dyspnea, arrhythmia, etc. If the respiratory center is paralyzed, death can occur in a short time.
[Diagnosis]
1. History of CO inhalation.
2. Clinical manifestations.
3. Laboratory test: The diagnosis can be confirmed if the blood ODHb is qualitatively positive or the quantitative amount exceeds 10%.
4. Attention should be paid to distinguishing it from acute sleeping pill poisoning.