![]() Typical symptoms of carbon Monoxide poisoning It is important for everyone to be aware of the “onset” symptoms of CO poisoning these are summarised in the following Table. Therefore, exposure to relatively small amounts of CO, for many, can increase health risks. Smokers will have raised CO levels of between 20 and 40 ppm. Most healthy people will have existing levels of CO in their blood between 0 and 10 ppm this can vary greatly depending on exposure to (for example) inner city road traffic and poorly maintained domestic appliances. Occupational Safety and Health Administration (OSHA) defines two limits for unhealthy CO exposure: an upper limit of 100 parts per million (ppm) in unventilated spaces and, an average exposure over 8 hours of 55 ppm. CO also reacts, chemically, with other proteins and enzymes in the blood which can lead to damage to the brain, heart and nervous system. In this respect, the symptoms are very similar to Hypoxia. This has a direct affect on the performance of those parts of our physiology that rely on Oxygen for proper functioning. When inhaled CO is absorbed easily into the bloodstream where it attaches itself to haemoglobin with an affinity over 200 times that of Oxygen. ![]() For example, in the UK alone: 50 people die, 200 people are hospitalised and 4,000 admitted to Accident & Emergency units annually, due to CO poisoning. ![]() Known as the “silent killer”, poisoning from CO is responsible for more than 400 deaths per annum in the USA and a similar number in Europe these are typically in industrial and domestic situations. Prolonged and repeat exposures at lower concentrations can lead to the same conclusions.ĬO is a colourless, odourless and tasteless gas, and is a by-product of the incomplete combustion of carbon-containing materials. Carbon Monoxide (CO) is a highly poisonous gas and exposure can quickly lead to short-term symptoms, long-term health issues, and even death.
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