Which gas is specifically reduced in Nitrox to lower exposure risks?

Prepare for the IANTD Enriched Air (Nitrox) Test. Enhance your understanding with multiple choice questions and explanations. Boost your confidence and readiness!

In the context of using Nitrox, which is a mixture of oxygen and nitrogen, the primary gas that is reduced to lower exposure risks is nitrogen. Diving with air involves a significant amount of nitrogen, which contributes to the risk of nitrogen narcosis and decompression sickness due to its solubility in body tissues. By employing Nitrox, which has a higher concentration of oxygen and a lower percentage of nitrogen compared to air, divers can effectively mitigate these risks.

This reduced nitrogen exposure allows for longer dive times at certain depths without as high a risk of developing decompression sickness, as the nitrogen uptake by the body is less compared to diving with regular air. Additionally, the increased oxygen level in Nitrox helps to reduce the effects of fatigue and improve the diver's overall experience.

In contrast, gases such as helium, carbon dioxide, and hydrogen do not play a significant role in the typical exposure risk reduction associated with Nitrox diving. Helium is often used in technical diving for deep dives due to its low narcotic properties but is not reduced in standard Nitrox mixtures. Carbon dioxide is a byproduct of respiration and is not a primary concern related to dive mixtures in the context of Nitrox. Hydrogen, while relevant in other areas of diving

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