Transcranial doppler ultrasound for the assessment of intracranial arterial flow velocity—Part 1. Examination technique and normal values☆
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2022, Clinical Neurology and NeurosurgeryCitation Excerpt :Two 2 MHz ultrasound transducers were placed over the right and the left temporal bone windows and fixed with a headpiece (Multidop®X; Compumedics, Germany), assessing the MCA-BFv at an average depth of 55 mm ( ± 3 mm) [29–31]. The primary outcome was the mean MCA-BFv since it is a central parameter in TCD with good reproducibility and less interindividual variability than the systolic or diastolic peak velocities [31–33]. The time-points of MCA-BFv assessment collected in relation to each block of stimulation were: T0: baseline; T1/online: 30 s after stimulation (immediately after ramp-up); T2/online: 2 min (before ramp-down); T3/offline: immediately after the end of stimulation (after ramp-down); T4/offline: 5 min after stimulation.
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This work was supported by the Deutsche Forschungsgemeinschaft SFB 200/D2 and the Bertelsmann Stiftung, Gütersloh.