[Use of nitrous oxide as a component of general anesthesia monitored by pulse oximetry during one-lung ventilation]. / Primenenie zakisi azota kak komponenta obshchei anestezii pod kontrolem pul'sooksimetrii vo vremia odnolegochnoi ventiliatsii.

Pulse oximetry was employed to monitor the arterial blood oxygenation during surgery of 300 patients with pulmonary carcinomas. N2O2 anesthesia in 2:1 ratio was administered to all the patients. Change for one-lung ventilation did not lead to changes of SpO2 in 59% of the patients, whereas in 41% of the patients this value reduced below 93%. Change of the gas ratio to 1:1 in 35% of the cases was found sufficient to elevate the SpO2 value to the norm and only in 6% of the patients N2O2 had to be excluded from the anesthesia scheme for the period of one-lung ventilation and artificial ventilation with pure oxygen had to be resorted to.