Velocity fields in the stenosed porcine abdominal aorta: A comparison between pulsed Doppler ultrasound and hot-film anemometry

To evaluate a newly designed Doppler ultrasound transducer for registration of turbulence, simultaneous point blood velocity measurements using hot-film anemometry were performed downstream of smooth graded stenoses on the abdominal aorta in pigs. Signal analysis included ensemble averaging, turbulence analysis and visualization of one-dimensional velocity profiles. We conclude, that pulsed Doppler ultrasound as compared to hot-film anemometry is able to register one-dimensional velocity profiles and estimate turbulent stresses in the poststenotic flow field.