Key result
Thermodilution RVEF measurements were unaffected by thermistor position (0-10 cm) but significantly decreased when the injection port was 5-7 cm proximal to the tricuspid valve.
Why the study?
Does catheter position affect thermodilution right ventricular ejection fraction measurements in a porcine model?
Population
6 pigs instrumented with an RV thermodilution catheter in the pulmonary artery, an injectate catheter in the…
Design
Preclinical
Authors
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Position-dependent artifacts may compromise thermodilution RVEF reliability at bedside; leaves open need for human validation and standardization.
Does catheter position affect thermodilution right ventricular ejection fraction measurements in a porcine model?
Thermodilution RVEF measurements are independent of thermistor position within the pulmonary artery up to 10 cm, but are significantly reduced by large distances from the injectate port to the tricuspid valve.
Spinale et al. (1991) studied this question. Catheter position variations was evaluated on Thermodilution RVEF measurements. Thermodilution RVEF measurements were unaffected by thermistor position (0-10 cm) but significantly decreased when the injection port was 5-7 cm proximal to the tricuspid valve.
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