The O2 fail-safe is intended to prevent delivery of hypoxic gas mixtures by what action when O2 pressure falls?

The O2 fail-safe is intended to prevent delivery of hypoxic gas mixtures by what action when O2 pressure falls?

• A. Shutting off N2O and air
• B. Increasing pipeline pressure
• C. Decreasing monitoring
• D. Activating the vacuum

Answer: (A)

The oxygen fail-safe works by automatically reducing or shutting off the flow of all non-oxygen gases when the oxygen supply pressure falls below a preset threshold. By cutting back nitrous oxide (and often other diluents like air), the machine prevents delivery of a hypoxic gas mixture and helps ensure that the patient continues to receive a safe level of oxygen. It does not raise pipeline pressure, change monitoring, or activate a vacuum.

The oxygen fail-safe works by automatically reducing or shutting off the flow of all non-oxygen gases when the oxygen supply pressure falls below a preset threshold. By cutting back nitrous oxide (and often other diluents like air), the machine prevents delivery of a hypoxic gas mixture and helps ensure that the patient continues to receive a safe level of oxygen. It does not raise pipeline pressure, change monitoring, or activate a vacuum.