Experimental and biological variation of three-dimensional transcranial Doppler measurements.

@article{Thomsen1993ExperimentalAB,
  title={Experimental and biological variation of three-dimensional transcranial Doppler measurements.},
  author={Lise Lykke Thomsen and Helle K. Iversen},
  journal={Journal of applied physiology},
  year={1993},
  volume={75 6},
  pages={2805-10}
}
A new transcranial Doppler system (3-D Transscan, Eden Medizinische Elektronik) was evaluated in relation to sex, age, intersubject, interobserver, side-to-side, and day-to-day variation. Fifty-eight healthy volunteers participated (aged 18-80 yr). Mean velocity was higher in females than in males and decreased with age. The coefficient of variation in the middle cerebral artery was 26% between subjects, 20% between sides, 16% between days, 13% between observers, and 7% during 5 min. The… CONTINUE READING