Chemiluminescence underestimates nitric oxide concentration in the presence of potent inhalation anaesthetics

We investigated the effect of potent inhalation anaesthetics on nitric oxide (NO) concentration measured by the chemiluminescence method. We found that the NO concentration was increasingly underestimated with increasing concentrations of halothane, isoflurane, enflurane and sevoflurane ( r 2 =0.918–0.997, P r 2 =0.909–0.982, P