Key result
Transit-time ultrasound showed excellent agreement with Doppler ultrasound for measuring flow in aortocoronary bypass grafts in vivo (correlation coefficient 0.990, mean error 1.5 ml).
Why the study?
Does the ultrasound transit-time method accurately measure flow in aortocoronary bypass grafts compared to the Doppler ultrasound method?
Population
In vitro model and in vivo cohort of 9 patients undergoing cardiac surgery with 17 saphenous vein grafts
Comparison
Ultrasound transit-time method for flow… vs Ultrasound Doppler method
Authors
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May support transit-time ultrasound for graft flow assessment; leaves open larger prospective validation before routine adoption.
Observational (n=9)
Does the ultrasound transit-time method accurately measure flow in aortocoronary bypass grafts compared to the Doppler ultrasound method?
Effect estimate: Correlation coefficient 0.990
The ultrasound transit-time method demonstrates excellent accuracy and agreement with the Doppler method for measuring flow in aortocoronary bypass grafts both in vitro and in vivo.
Matre et al. (1994) conducted an observational in Aortocoronary bypass grafts during cardiac surgery (n=9). Transit-time ultrasound method vs. Doppler ultrasound method was evaluated on Agreement of flow measurements in vivo (Correlation coefficient 0.990). Transit-time ultrasound showed excellent agreement with Doppler ultrasound for measuring flow in aortocoronary bypass grafts in vivo (correlation coefficient 0.990, mean error 1.5 ml).
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