• J. Oral Maxillofac. Surg. · Jan 1992

    Utility of capnography in predicting venous carbon dioxide partial pressure in sedated patients during outpatient oral surgery.

    • S J Prstojevich, S R Sabol, M S Goldwasser, and C Johnson.
    • Department of Oral and Maxillofacial Surgery, Carle Foundation Hospital, Urbana, IL 61801.
    • J. Oral Maxillofac. Surg. 1992 Jan 1; 50 (1): 37-9; discussion 40.

    AbstractTwelve ASA class I patients scheduled for removal of third molars under intravenous sedation were included in the study. Samples for venous blood gas analysis were drawn every 5 minutes and the venous partial pressure of carbon dioxide was compared to the end-tidal CO2 recorded from a modified nasal cannula at the same time the samples were drawn. Correlation analysis was performed using the Pearson correlation coefficient. The overall correlation between end-tidal CO2 and PVCO2 was .54 (P = .0001). The results of the investigation indicate that through simple modifications of the end-tidal CO2 monitoring device, the correlation between end-tidal CO2 and serum PCO2 in a nonintubated patient can be improved.

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