At a sewer dredging site in Chongqing, workers were unconscious due to methane poisoning at work. What warning does this give us?

At a sewer dredging site in Chongqing, a worker was unconscious due to methane poisoning. Li Rong, a passing doctor, knelt down for emergency rescue. After the ambulance arrived, the video of a female doctor successfully rescuing three methane poisoning sanitation workers and leaving silently spread on the Internet, which attracted the attention and heated discussion of many netizens. An emergency occurred at a sewer dredging site in Chongqing. Three workers were in a coma due to methane poisoning. They don't know whether they are alive or dead. At this critical moment, a passing female doctor stepped forward and saw her kneeling down to rescue her.

Three workers were given cardiopulmonary resuscitation and artificial respiration respectively, and the situation was observed. It was not until the ambulance arrived that she silently turned and left the scene after helping the rescued person board the ambulance. According to media reports, all the workers are now out of danger, and the woman who saved people at that time also knew that she was Li Rong, a doctor at Chongqing Maternal and Child Health Hospital, which was admirable. When biogas is used for lighting and cooking, the windows are often opened for ventilation. Be sure to turn off the switch after using biogas, because biogas leaks in the house and is easy to catch fire and be poisoned. In order to ensure safety, people who enter the pool had better wear a safety rope around their waist, and someone is waiting outside the pool. If they feel bored and uncomfortable when working in the pool, they should leave the pool immediately and rest in a ventilated place.

The main mechanism of biogas poisoning is hypoxia poisoning. Because biogas itself is non-toxic, the main component of biogas is methane, and the chemical formula of methane is CH4, so biogas poisoning is mainly due to the increase of biogas and the decrease of oxygen content in the air, resulting in a series of symptoms caused by insufficient oxygen. For the clinical treatment of biogas poisoning, we should first get patients out of the poisoning environment, but at the same time, we should also pay attention to the rescuers to avoid poisoning ourselves during the rescue process. Put the patient in a ventilated and aerobic environment. If conditions permit, patients should be treated with high-flow oxygen and hyperbaric oxygen at the same time.

If most patients have mild to moderate poisoning, they can get better after oxygen inhalation and symptomatic treatment. For some severe patients, the clinical hypoxia time is longer and the prognosis may be worse. Because the prognosis of methane poisoning mainly depends on the poisoning time. The longer the poisoning time, the more serious the hypoxia will be, which will lead to some clinical symptoms similar to delayed encephalopathy. Generally speaking, mild to moderate is ok, but some patients with serious illness will leave some sequelae. Such as neurasthenia, dizziness, unsteady walking, inability to stand upright, involuntary movements, toxic kidney injury, mental disorder, dementia, paralysis, cardiovascular diseases and so on. In severe cases, respiratory paralysis can lead to death.