Laser treatments can be hazardous when delivered in the presence of?

Laser treatments can be particularly hazardous when delivered in the presence of compressed oxygen due to the highly flammable nature of oxygen under pressure. When lasers are used, they generate intense heat and light, which can ignite materials or cause combustion in an oxygen-rich environment. This poses significant risks to both the operator and the client, as it can potentially lead to fire hazards or injuries.

In contrast, while moisture can affect the laser's efficacy and may obscure the treatment area, it does not pose the same level of fire risk. Similarly, carbon dioxide and helium are not combustible in the same way oxygen is, making them less risky in the context of laser safety. Understanding the specific hazards associated with various environmental factors is crucial for ensuring safety during laser treatments.