Carbon monoxide (CO) is a colorless and odorless gas produced by the incomplete burning of material containing carbon. You can't see it, smell it or taste it but carbon monoxide can cause serious illness or death. It has been referred to many times as the ?silent killer? and is the leading cause of accidental poisoning deaths in America. The Center for Disease Control (CDC) estimates that CO poisoning claims nearly 500 lives, and causes more than 15,000 visits to hospital emergency departments every year in the U.S.

To be sure, this odorless, tasteless and colorless gas is ruthless. Your exposure to CO would quickly result in one or more symptoms including headache, nausea and fatigue. The deadly gas goes undetected in a home without a proper CO detector, and if the people exposed to it do not know of its existence in their environment a proper diagnosis is problematic. Further, CO poisoning can be notoriously difficult to diagnose because the symptoms mimic those of other conditions, notably the flu. Children, pregnant women, babies and individuals with heart conditions are at most risk but CO poisoning can affect anyone. Prolonged exposure can lead to brain damage and ultimately death.

Sources of CO

Some sources of carbon monoxide include gas water heaters, kerosene space heaters, charcoal grills, propane heaters and stoves, gasoline- and diesel-powered generators, cigarette smoke, propane-fueled forklifts, gas-powered concrete saws, indoor races or tractor pulls, boat engines, spray paint, solvents, degreasers and paint removers. Although CO results from when any material burns, more is produced when there is insufficient oxygen for fully efficient combustion. And, yes, cigarette smoke, including the second-hand variety, contains CO, although in an insufficient concentration to do immediate damage. Given enough time, of course, even small amounts of CO can build to dangerous levels in the bloodstream.

The danger comes from improperly vented appliances and machinery such as those listed above, especially ones that run for extended periods of time near human habitation. Such continuous exposure can lead to flu-like symptoms, as noted previously, but would keep escalating into more severe headaches, fatigue, dizziness and nausea. As toxic levels are approached, a victim may experience mental confusion, severe irritability, impaired judgment, memory loss and lack of coordination.

Treatment and prevention

The fastest and most effective way to begin treating the effects of CO poisoning is to relocate affected people (and pets) to open, fresh air away from the source of the gas immediately. At an emergency room, someone suffering from acute CO poisoning will be given pure oxygen to breathe, which speeds up the excretion of the gas from the blood. More serious cases may require a special treatment known as Hyperbaric Oxygen Therapy (HBOT). This therapy can significantly improve the chances of survival and reduce the risk of further damage to the body. HBOT elevates the amount of oxygen in the body to about ten times normal levels by placing the victim inside a hyperbaric (higher than atmospheric pressure) chamber. Most of the developed world's hospitals are now equipped with this lifesaving technology.

The best way for you and your loved ones to avoid the ?silent killer? is to be educated on how and why CO poisoning occurs. Also, if you live in an environment that includes any of the CO sources mentioned above, you should take the appropriate action to repair any leaks or malfunctions in them. Of course, installing CO detectors in your home and place of business, and maintaining them with fresh batteries, is a powerful preventative step, as well. If you do not think ahead and follow a thorough anti-CO strategy, you are most definitely putting yourself, your family, your friends and neighbors, and your employees at great risk.