carbogen

Definition / meaning of carbogen

An inhalant consisting of hyperoxic gas (95%-98% oxygen and 2%-5% carbon dioxide) with radiosensitizing properties. Inhaled carbogen reduces diffusion-limited tumor hypoxia, increasing tumor radiosensitivity due to the increased availability of molecular oxygen for cytotoxic radiation-induced oxygen free radical production.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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