Key result
Continuous SVO2 measurement using the Opticath pulmonary arterial catheter showed strong correlation with standard oximeters (r=0.92 and 0.89; p<0.0001) during elective coronary bypass surgery.
Why the study?
Does the Opticath fiberoptic pulmonary artery catheter accurately measure SVO2 and correlate with hemodynamic changes in patients undergoing elective coronary bypass surgery?
Observational (n=13)
Does the Opticath fiberoptic pulmonary artery catheter accurately measure SVO2 and correlate with hemodynamic changes in patients undergoing elective coronary bypass surgery?
Effect estimate: r = 0.92 and 0.89
p-value: p=<0.0001
The Opticath continuous SVO2 monitor provides accurate oxygen saturation measurements that reliably correlate with significant hemodynamic changes during coronary bypass surgery.
Cautions against routine adoption in CABG; leaves open prospective validation of continuous SVO2 monitoring.
A new pulmonary arterial catheter (Opticath), containing the standard pulmonary artery catheter features plus two fiberoptic filaments to permit continuous measurement of oxygen saturation (SVO2) by a companion oximeter, was studied in 13 patients undergoing elective coronary bypass surgery. The study was designed to evaluate the accuracy of Opticath SVO2 measurements, to determine the incidence of catheter-related problems, and to correlate changes in SVO2 with hemodynamic changes. A good correlation was found between the SVO2 determined by the Opticath and that measured by American Optical and Radiometer Oximeters (r = 0.92 and 0.89 respectively; p less than 0.0001). There was a significant correlation between increases or decreases in values of SVO2 greater than or equal to 5% and corresponding changes in cardiac index, stroke index, and left ventricular stroke work index (p less than 0.001), and an 86% probability that SVO2 decrease greater than or equal to 5% reflected a significant decline in cardiac index.
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Waller et al. (1982) conducted an observational in Elective coronary bypass surgery (n=13). Opticath pulmonary arterial catheter vs. American Optical and Radiometer Oximeters was evaluated on Accuracy of Opticath SVO2 measurements compared to standard oximeters (r = 0.92 and 0.89, p=<0.0001). Continuous SVO2 measurement using the Opticath pulmonary arterial catheter showed strong correlation with standard oximeters (r=0.92 and 0.89; p<0.0001) during elective coronary bypass surgery.
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