Utility of capnography in predicting venous carbon dioxide partial pressure in sedated patients during outpatient oral surgery.
Twelve 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.
Prstojevich
S J
SJ
Department of Oral and Maxillofacial Surgery, Carle Foundation Hospital, Urbana, IL 61801.
Sabol
S R
SR
Goldwasser
M S
MS
Johnson
C
C
D000293:Adolescent; D000328:Adult; D000556:Ambulatory Surgical Procedures; D000766:Anesthesia, Dental; D001944:Breath Tests / Q000379:methods*; D002245:Carbon Dioxide / Q000032:analysis* / Q000097:blood; D002404:Catheterization; D016292:Procedural Sedation; D005260:Female; D006801:Humans; D008297:Male; D008964:Molar, Third / Q000601:surgery*; D010313:Partial Pressure; D012044:Regression Analysis; D013990:Tidal Volume; D014680:Veins
D002245:Carbon Dioxide