Cool summer wearing "big white" increases the risk of heat stroke, Huashan infection: "first -level+" protection for ordinary people outdoor people can be sampled

Recently, rare high temperatures have appeared in many places in China. The prevention and control of the new crown epidemic cannot be slackened. It is necessary to overcome the extreme climate environment for medical staff, disease control personnel and other epidemic prevention workers, and continue to fight on the front line of the new crown resistance. However, how to prevent and control and control the health and safety of epidemic prevention personnel should not be underestimated to the greatest extent.

Zhang Wenhong, director of the Department of Infectious Department of Huashan Hospital affiliated to Fudan University: This morning, it is reminded that unlike the treatment of new crown patients in the square or designated hospital ward. The protection measures for "first -level+" (small blue+glove+N95 mask) should be sufficient to prevent infection. When close contact, you can wear face screen protection on the basis of the N95 mask. Ordinary epidemic prevention workers (non -sampling personnel), especially in the hot summer outdoor environment, are recommended to properly standardize wearing masks, and pay attention to hand hygiene.

The deputy chief physician of the Department of Infectious Department of Huashan Hospital introduced: heat stroke is a pathological state that can threaten life. If it is found in time and incorrect treatment, it may lead to irreversible damage and even death. In clinical, no symptoms can simply find out heat stroke in the early days. Therefore, anyone who looks discomfort or abnormal behavior in a hot and/or humid environment, or those who perform strenuous exercise in a warm environment, should consider whether there is heat stroke.

Under normal circumstances, patients with heat stroke may have the following various performances, including: weakness, latitudes, headaches, dizziness, nausea, vomiting, diarrhea, fatigue, hysteria, anxiety, confusion, unstable walking, decreased judgment, overwhelming, failure, exhaustion , Lost consciousness, muscle spasm, irrational behavior and coma.

Why wearing "big white" in the hot environment to increase the risk of heat stroke?

Experts explain that 80%of the human body's metabolism can be transmitted to the skin through normal metabolism, exercise, and tremor in the muscles, and then lost to the environment. Blood circulation enhances and regulates this heat transfer by changing surface blood flow. The clothes change the heat loss by acting as a conductor or insulator.

In the static state of 20 ° C, the conduction and convection accounted for only about 10%of our calories, most of which were generated through radiation. Therefore, at this time, a thin layer of "big white" has little effect on radiation heat dissipation.

However, the ambient temperature rises to more than 35 ° C, it is impossible to heat dissipation by conduction, convection or radiation. The ability of the human body to survive and work at high temperature depends on the ability of sweating. Sweating can cause the body to lose heat by evaporating at any ambient temperature. Only when the air is saturated in the air, the heat loss will occur. Therefore, sweating is the most effective in hot and dry deserts, and the effect is poor in hot and humid rain forests.

In the high temperature environment, when a person is wearing "big white", "big white" will wrap the whole body, while playing a protective role, a good isolation layer will prevent most of the sweat from evaporating. This is like in the hot and humid tropical rain forest. The water vapor around the human body appears saturated, and it stopped by evaporating the heat dissipation. When all the heat dissipation channels are prevented, the temperature of the human body will rise sharply, leading to heat stroke.

Continue to wear "big white" in the hot environment will prevent the heat of the human body from being distributed, resulting in sweat condensation and gardenia. It may reduce water intake and rest in the middle of the work due to inconvenience. All these will greatly increase the probability of heat stroke. In addition, a "big white" soaked in sweat has also been greatly reduced.

Experts finally emphasized that for the samples of the crowd, the staff in principle only need to be infected as long as the "first -level+" protection measures should be sufficient. When close contact, you can wear face screen protection on the basis of the N95 mask.

Ordinary epidemic prevention workers (non -sampling personnel), especially in the outdoor environment of hot summer, recommend correctly and regulate wearing masks, and pay attention to hand hygiene.

In the hot summer work, epidemic prevention should pay attention to staged rest and drinking water. The working hours should not be too long. If there are heat stroke symptoms, the work should be suspended in time and transferred to the cool and ventilated environment to supplement water.

Liberation Daily · Shangguan News Original manuscript, reprinting without permission

Author: Gu Yong

WeChat editor: Jiasinmin

School pair: Xiaochuan

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