The Effects of Anesthetics on anIn-vivoOxygen Electrode

Abstract

The IBC in-vivo oxygen electrode may be used during anesthesia. The possibility that three common inhalation anesuietics—halothane, enflurane, and methoxyflurane—might be reduced at the electrode, thereby changing the P_o2 value, was tested. Enflurane and methoxyflurane do not affect die current produced at the electrode; halothane significantly increases P_o2 readings at oxygen tensions below 105 torr. It is suggested that Pa_o2 readings below 105 torr be confirmed by the standard bench method.