End-tidal oxygen concentration and pulse oximetry for monitoring oxygenation during intratracheal jet ventilation

摘要: Objective. In this study, we evaluated the usefulness of end-tidal oxygen monitoring during intratracheal jet ventilation (ITJV) for endolaryngeal laser surgery.Methods. A total 20 consecutive patients both genders scheduled procedures under general anesthesia were studied. Inspiratory concentration and respiratory rate varied, with serving as their own controls. Readings pulse oximetry, airway oxygen, carbon dioxide concentrations recorded, arterial blood samples gas analysis taken.Results. At cycle rates cycles/min, (ETo2) indicated alveolar hypoxia 30 to 60 sec before hypoxemia was detected by oximetry. Jet mixing inspiratory expiratory caused a larger difference between than normally seen conventional ventilation. Correlations ETo2 concentrations, saturations, levels depended on concentration; correlations stronger at low high rates.Conclusions. should be maintained well over 21% ITJV prevent hypoxia. Monitoring cycles/min less verifies safe surgery, confirms adequate oxygenation.