Knowra Carbon monoxide poisoning Carbon monoxide poisoning Carbon monoxide poisoning is illness caused by inhaling carbon monoxide, which binds hemoglobin and impairs oxygen delivery to tissues. It can also disrupt cellular respiration and injure the heart and brain.
Carboxyhemoglobin : Carboxyhemoglobin is hemoglobin bound to carbon monoxide, reducing the blood’s capacity to carry oxygen. Its formation is the central blood-level event in carbon monoxide poisoning.
Pulse oximetry : Pulse oximetry estimates arterial oxygen saturation using light transmitted through tissue. Standard devices can mistake carboxyhemoglobin for oxyhemoglobin and give falsely reassuring readings.
Carbon monoxide poisoning from fires : Carbon monoxide poisoning from fires results from inhaling gas produced by incomplete combustion during a fire. Fire smoke can combine carbon monoxide exposure with airway injury and other toxicants.
Cyanide poisoning : Cyanide poisoning is illness caused by cyanide inhibiting cellular respiration, especially through cytochrome c oxidase. Both can impair cellular oxygen use, but cyanide does not primarily form carboxyhemoglobin.
Carbon monoxide poisoning symptoms : Carbon monoxide poisoning symptoms include headache, dizziness, nausea, confusion, chest pain, and loss of consciousness. These nonspecific symptoms often resemble flu or other common illnesses.
Hemoglobin : Hemoglobin is the iron-containing protein in red blood cells that transports oxygen and some carbon dioxide. Carbon monoxide binds hemoglobin far more strongly than oxygen, disrupting oxygen transport.
Co-oximetry : Co-oximetry measures multiple hemoglobin species, including oxyhemoglobin, carboxyhemoglobin, and methemoglobin. It directly quantifies carboxyhemoglobin, unlike ordinary pulse oximetry.
Carbon monoxide poisoning from generators : Carbon monoxide poisoning from generators occurs when engine exhaust accumulates in enclosed or poorly ventilated spaces. Portable generators are a preventable source of severe household and storm-related exposures.
Methemoglobinemia : Methemoglobinemia is a disorder in which oxidized hemoglobin cannot effectively bind and transport oxygen. It also disrupts oxygen delivery, but produces methemoglobin rather than carboxyhemoglobin.
Carbon monoxide poisoning diagnosis : Carbon monoxide poisoning diagnosis combines exposure history, clinical findings, and blood measurement of carboxyhemoglobin. Prompt suspicion matters because symptoms and ordinary oxygen readings can be misleading.
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