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When you breathe in carbon monoxide, the gas binds to hemoglobin in your blood. This prevents your blood from carrying oxygen to vital organs in your body. Carbon monoxide poisoning can damage your brain and heart and can be lethal. Brain damage can happen even after the poisoning has stopped. The Centers for Disease Control and Prevention (CDC) estimate that more than 400 people die every year from carbon monoxide poisoning in the United States. In addition, more than 50,000 people are seen in hospital emergency departments with carbon monoxide poisoning.
Common symptoms of carbon monoxide poisoning include the following:
Carbon monoxide is especially dangerous to people who are asleep or intoxicated and might not notice symptoms or are unable to rescue themselves. People with existing heart or brain damage, children, and unborn babies are most vulnerable to carbon monoxide poisoning, but even healthy individuals can have permanent brain and sometimes heart damage from poisoning.
Carbon monoxide poisoning is a life-threatening emergency. If you suspect that you or another person has been poisoned by carbon monoxide, go to an area with fresh air and call 911 immediately.
Common sources of carbon monoxide include:
Carbon monoxide poisonings are a year-round threat, but are more common in the winter months when more fuel-burning devices are in use.
Carbon monoxide poisoning is diagnosed based on a patient’s symptoms and reports of breathing too much carbon monoxide. Blood tests for elevated levels of carbon monoxide in the blood (e.g. carboxyhemoglobin), can confirm poisoning, but even if this blood test is normal, poisoning may have occurred.
If you suspect someone has carbon monoxide poisoning, move the person to a ventilated area immediately and call 911. When Emergency Medical Services (EMS), arrive, providers will give the person supplemental oxygen and monitor them. If necessary, they will transport the person to a hospital.
At the Emergency Department, high-flow oxygen will be given and the person will be evaluated for heart injury. Some patients require treatment with hyperbaric oxygen inside a pressurized chamber. Oxygen therapy removes carbon monoxide from the patient’s blood and tissue more quickly. Hyperbaric oxygen does this even faster rate and also prevents damage caused by inflammation from the poisoning. Some patients need more than one hyperbaric oxygen treatment.
Even with prompt therapy, some patients can have ongoing problems and may need additional evaluation and treatment days to months later. Some will have permanent brain damage, and less commonly heart damage from carbon monoxide poisoning.
Carbon monoxide poisoning is preventable. There are some simple measures to help prevent carbon monoxide poisoning:
Carbon monoxide is a gas that you can’t see or smell. It comes from burning carbon-based fuel such as natural gas, gasoline, diesel, wood, propane, or charcoal. Cars, trucks, fireplaces, and furnaces produce carbon monoxide. If carbon monoxide is produced in an area that isn’t open to the outside (ventilated), any people in that area can be poisoned by breathing too much of the gas. This can happen if a fireplace or furnace stops working correctly. Carbon monoxide poisoning can be a life-threatening emergency. Learn more about carbon monoxide poisoning and what you can do to protect yourself and your family.