O2 stands for:

O2 stands for:

• A. Nasogastric
• B. Oxygen
• C. Out of Bed
• D. By Mouth

Answer: (B)

O2 in medical shorthand stands for oxygen, the gas we breathe that cells need to produce energy. In clinical care, oxygen is often given as supplemental therapy via devices like nasal cannulas or masks, and its delivery is described with terms like FiO2. The other options don’t fit the symbol: nasogastric refers to a tube from the nose to the stomach, out of bed is a phrasing about patient movement, and by mouth indicates an oral route for intake or medication. Oxygen is the only term that matches O2.

O2 in medical shorthand stands for oxygen, the gas we breathe that cells need to produce energy. In clinical care, oxygen is often given as supplemental therapy via devices like nasal cannulas or masks, and its delivery is described with terms like FiO2. The other options don’t fit the symbol: nasogastric refers to a tube from the nose to the stomach, out of bed is a phrasing about patient movement, and by mouth indicates an oral route for intake or medication. Oxygen is the only term that matches O2.