What CO-oximetry value is common for a heavy smoker?

For a heavy smoker, a CO-oximetry value that typically ranges between 10% to 15% carboxyhemoglobin (COHb) is expected. Smoking introduces significant amounts of carbon monoxide into the bloodstream, leading to elevated levels of COHb.

In heavy smokers, these levels can be quite pronounced due to the frequency and intensity of their smoking habits. While some lighter smokers may exhibit lower COHb levels, heavy smoking tends to consistently produce values within this range. The upper limit of the range indicates that it's possible for heavy smokers to experience even higher concentrations, but the 10-15% range is well documented as a common finding.

Higher COHb levels, such as those in the 15-20% or 20-25% ranges, are typically associated with acute carbon monoxide poisoning or severe exposure scenarios rather than everyday smoking habits. Therefore, the 10-15% range is a more accurate representation of what would be expected from a heavy smoker under normal conditions.