![]() ![]() Carbon monoxide poisoning (CO poisoning) is caused by the inhalation or absorption of carbon monoxide from the exhaust of gasoline- or propane-powered appliances or cigarette smoke. As carboxyhemoglobin levels of poisoned patients do not correlate with symptoms or outcome, their greatest utility is a marker of exposure.Ĭarbon monoxide poisoning carboxyhemoglobin.Ĭopyright© Undersea and Hyperbaric Medical Society. Carbon monoxide (chemical formula: CO) is an odourless, colourless gas produced from the incomplete combustion of hydrocarbons in propane and gasoline. Conversely, a low level does not exclude significant exposure under certain circumstances. A level over 9% is almost always due to exogenous carbon monoxide exposure, even among smokers. Carboxyhemoglobin levels are typically lower than 2% in non-smokers and lower than 5% in smokers. When inhaled in large quantities, CO enters the bloodstream and binds to hemoglobin molecules with a much greater affinity than oxygen, creating carboxyhemoglobin. For clinical purposes, arterial and venous carboxyhemoglobin levels can be considered to be equivalent. Carbon monoxide (CO) is a poisonous gas produced through burning fuel. Carboxyhemoglobin levels are quite stable and can be accurately measured on a transported blood sample. Carboxyhemoglobin levels cannot be measured with conventional pulse oximetry, can be approximated with pulse CO-oximetry, and are most accurately measured with a laboratory CO-oximeter. ![]() While patients with carbon monoxide poisoning are often said to be "cherry-red," such discoloration is rarely seen. The client reports severe left shoulder pain (pain score of 10 on a 1 to 10 scale). The client is being assessed for intra-abdominal injuries. Following a motor vehicle collision, a client is brought to the ED for evaluation and treatment. One of carbon monoxide's several mechanisms of toxicity is binding with circulating hemoglobin to form carboxyhemoglobin, resulting in a functional anemia. is the antidote for acetaminophen toxicity.
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