Anesthesia · single question
The minimum concentration of nitrous oxide generally needed to produce clinical analgesia/sedation is approximately:
Show answer and explanation
Correct answer: C. 30%
- A. Generally insufficient for a clinical effect.
- B. Usually below the effective threshold for most patients.
- C. Correct. Clinically useful sedation/analgesia generally begins around 30% N2O (titrate as needed; do not exceed ~50–70%).
- D. 70% approaches/exceeds the safe upper limit and risks hypoxia.