Which of the following is a potential risk of using Nitrox?

Using Nitrox presents various benefits for divers, primarily the reduction of nitrogen in their breathing gas, but it also introduces potential risks. One significant risk is oxygen toxicity, which can occur when divers use gas mixtures with elevated levels of oxygen, typical in Nitrox blends.

As the percentage of oxygen increases, so does the likelihood that exposure to higher partial pressures could lead to toxic effects during dives, particularly at greater depths. Symptoms of oxygen toxicity can include visual disturbances, muscle twitching, and convulsions, which pose a serious hazard to divers.

In contrast, increased nitrogen levels are not a concern with Nitrox since the nitrogen content is lower compared to standard air, reducing the risk of related issues like decompression sickness, which primarily stems from nitrogen. Decompression sickness and lack of air supply are also concerns but are more associated with factors other than just using Nitrox specifically. Understanding oxygen toxicity is critical for divers to manage their gas mixtures safely and effectively.