Characteristics of carbon dioxide poisoning and safety prevention
Carbon dioxide is mainly inhaled into the human body through the respiratory tract, and often occurs in the following environments: long-term closed mines (mainly coal mines and oil wells), bottoms of cabins and sewers, etc .; production processes using plant fermentation to produce sugar, brewing wine, making acetone from corn, and making yeast; unventilated cellars for storing vegetables, fruits, and grains And closed warehouses; the production of carbonated beverages such as beer and soda; the filling and use of carbon dioxide fire extinguishers; the manufacture of carbonate uric acid and other chemicals in the chemical industry; the use of dry ice and liquid carbon dioxide to create low temperatures for food freezing, experimental cooling and low-temperature testing; Sub-arc welding operations; various flammable substances are used as inerts during manufacturing, handling and transportation; due to equipment failure or improper use during diving operations and the number of people working in confined spaces, the time exceeds the limit, all can cause occupations with a high concentration of carbon dioxide contact. Acute occupational poisoning mainly occurs in closed and poorly ventilated cellars, mines, sewers, dry wells, grain silos, fermentation chambers, etc.
The main symptoms are:
Headache, dizziness, tinnitus, shortness of breath, chest tightness, fatigue, rapid heartbeat, cyanosis of the cheeks, irritability, delirium, difficulty in breathing, if the condition persists, drowsiness, apathy, coma, disappearance of reflexes, dilated pupils, incontinence of urine, incontinence, Blood pressure drop or even death. If the concentration of carbon dioxide reaches more than 1%, it will make people dizzy. When it reaches 4 to 5%, the person will nausea and vomit and have difficulty breathing. More than 10%, people will die.
1. Routine treatment
Quickly leave the scene and breathe fresh air or oxygen. The patient's collar should be loosened to keep the respiratory tract unobstructed; keep warm; observe the state of consciousness and monitor vital signs. For those who have stopped breathing and heartbeat, they should insist on artificial respiration, chest compression or chest massage, and should not give up lightly. Those who have difficulty breathing are injected with breathing stimulants, such as lobeline hydrochloride, nicoxamol, and intramuscular injection.
2. Hyperbaric oxygen therapy
Hyperbaric oxygen therapy can increase the amount of physically dissolved oxygen in the blood and increase the overall oxygen content. For hypoxic encephalopathy, mental recovery is still poor or decorticate state, intermittent hyperbaric oxygen therapy is performed. After 2 to 3 courses of treatment, rest for 2 to 3 weeks, and then do 2 to 3 courses of treatment. Routine treatment should not be stopped during hyperbaric oxygen therapy.
3. Symptomatic treatment
Antibiotics are given to those with secondary infections; large doses of sedatives are given to those with spasms of the extremities; hibernation drugs are available to those with persistent fever and convulsions. Those who stop breathing should immediately artificial respiration, establish an artificial airway, assist ventilation.
When entering a place with a high concentration of carbon dioxide, ventilate and exhaust first, and wear safety equipment.
When entering long-term closed waste wells, kilns, mines, sewers, etc., use instruments and instruments that can detect air content components (for example carbon dioxide detector / four-in-one gas detector / single gas detector, etc.) to ensure life safety. Our portable gas detector AGH5100 and AGH6100 can detect CO2, to protect you and offer you a safer working and living condition.