Why do female students and coaches practice driving at high temperature lead to poisoning?

It is reported that Ms. Huang is 40 years old and is studying driving in a driving school in Hankou.

17 noon 1 30, she braved the high temperature of nearly 40 degrees, accompanied by her coach, and practiced on the road for the first time in gold and silver lake. Because of the hot weather, she closed the window and put the air conditioner into internal circulation mode. After stopping at low speed for more than an hour, she suddenly lost consciousness.

The male coach sitting in the co-pilot seat is also a little dizzy. He quickly stepped on the secondary brake, carried Ms. Huang to the back row, resisted dizziness and drove back to the driving school.

Colleagues in the driving school thought that the two had heatstroke and arranged for them to rest in the air-conditioned room. Unexpectedly, until six o'clock in the evening, Ms. Huang was still unconscious, vomiting, convulsions and incontinence, and the coach was always dizzy.

Colleagues sent them to Hubei Hospital of Integrated Traditional Chinese and Western Medicine.

After examination, the two were diagnosed as carbon monoxide poisoning.

After oxygen inhalation, the coach with mild symptoms improved, while Ms. Huang was still in a coma. At about 10 that night, the two received hyperbaric oxygen therapy. The coach recovered and was discharged the next day. Ms. Huang regained consciousness.

The doctor said that when the car engine is idling, the gasoline is not completely burned, and a large amount of carbon monoxide will be produced in the car. At the same time, the people in the car will exhale a large amount of carbon dioxide, which will drastically reduce the oxygen in the car, and it is prone to symptoms of carbon monoxide poisoning such as dizziness and nausea. Closing the window and maintaining the internal circulation mode of the air conditioner will increase the probability of poisoning.