Carbon monoxide poisoning accident identification

Carbon monoxide poisoning is poisoning caused by inhalation of the products of incomplete combustion of carbon-containing substances through the respiratory tract, commonly known as gas poisoning. The mechanism of poisoning is that the affinity between carbon monoxide and hemoglobin is 200 to 300 times higher than the affinity between oxygen and hemoglobin. Therefore, carbon monoxide can easily combine with hemoglobin to form carboxyhemoglobin, causing hemoglobin to lose its oxygen-carrying ability and role, causing tissue suffocation. It has toxic effects on tissue cells throughout the body, especially the cerebral cortex.
Carbon monoxide poisoning is caused by the human body inhaling excessive amounts of carbon monoxide gas, which usually occurs when protection is inadequate or ventilation is poor. In northern my country, acute carbon monoxide poisoning is mostly caused by improper use of gas and water heaters, or insufficient combustion of coal when burning coal for heating.
Zhongke Testing and Appraisal Institute can provide identification services for carbon monoxide poisoning accidents and make accurate identifications of trace evidence analysis and accident cause analysis in various carbon monoxide poisoning accidents.

1, burning stoves for heating
When the weather is cold, some people burn stoves in closed environments for heating. Carbon monoxide is produced when wood is not burned sufficiently, which may lead to carbon monoxide poisoning.
2, gas leakage
Household gas pipelines that are not maintained for a long time, improper use, and other factors may cause gas leakage. This situation may also cause carbon monoxide poisoning.
3, occupational exposure
Industrial blast furnace gas or water gas contains high concentrations of carbon monoxide, and the environment in the production process is sealed, which may also lead to carbon monoxide poisoning.

The "gas water heater" involved had been installed in the bathroom and could be used directly when the client's family rented a house. The victim entered the bathroom one night and used the "gas water heater" involved to take a bath. 30 minutes later, the client discovered that the victim had been taking a bath for too long. After knocking on the door and getting no response, he pushed the door and entered and found the victim passed out on the ground. The victim was then sent to the hospital for rescue and was diagnosed with carbon monoxide poisoning.
Our company was entrusted by the client to analyze the causes of carbon monoxide poisoning accidents caused by the quality problems of the entrusted "water heaters".
identification analysis results:
Our company's identification personnel went to the scene to conduct an inspection. The analysis of the causes of the "carbon monoxide poisoning accident" involved is as follows:
The bathroom involved was small and had no windows. When the victim was bathing in the bathroom, he closed the bathroom door tightly, making the bathroom a relatively closed space.
The "gas water heater" involved was directly installed in this kind of working environment without installing a smoke exhaust pipe, which would cause the burned smoke to be directly discharged into the bathroom. At the same time, because the bathroom space is relatively airtight, fresh air from the outside cannot enter the bathroom for effective replenishment. The carbon dioxide and other exhaust gases emitted during the operation of the gas water heater accumulate, and the oxygen content of the air in the bathroom continues to decrease, which ultimately leads to insufficient combustion of gas, thus causing a significant increase in the carbon monoxide content emitted into the flue gas. Users bathing in this bathroom are prone to carbon monoxide poisoning or suffocation.