Changes in blood flow velocity in the radial artery after 1-hour of ultrasound monitoring using a diagnostic 1 - 5 MHz transcranial probe – a pilot study

Petr Bardoň (1) , David Školoudík (2, 3) , Kateřina Langová (4) , Roman Herzig (5) , Petr Kaňovský (5)

1 Neurology
2 Neurology
3 Neurology
4 Department of Biometry
5 Neurology

Purpose: Multiple biological effects of ultrasound on the human body have been described. The aim was to monitor changes in blood flow velocities in the radial artery (RA) during continuous pulsed wave Doppler monitoring (DM). Methods: Fifteen healthy volunteers (8 males; mean age 54.7±17.0 years) underwent 1-hour DM the left RA using a diagnostic transcranial 2-MHz probe. The measurements of blood flow velocities in 2-minute intervals were performed twice. During both sessions, the peak systolic velocity (PSV), end-diastolic velocity (EDV), mean flow velocity (MFV), pulsatile index (PI), and resistive index (RI) were recorded. During the first session, the recording was intermittent (monitoring period <10 s). During the second session 2 weeks later, continual DM was performed. Results: Irregular changes in the measured parameters were recorded during both sessions. The changes in the blood flow parameters during the intermittent measurement were similar in positive and negative deflections. In contrast, an increase in EDV, and decreases in PI and RI were significantly higher during the continual DM (p=0.04, p=0.04, and p=0.03, respectively). The changes in PSV and MFV did not differ between both measurements. Conclusions: One-hour ultrasound Doppler monitoring using a 2-MHz diagnostic transcranial probe may lead to repetitive peripheral vasodilatation in humans.

Mots clés: Medicine

Petr Bardoň, David Školoudík, Kateřina Langová, Roman Herzig, Petr Kaňovský. Changes in blood flow velocity in the radial artery after 1-hour of ultrasound monitoring using a diagnostic 1 - 5 MHz transcranial probe – a pilot study. Journal of Clinical Ultrasound, 2010, 38 (9), pp.493. ⟨10.1002/jcu.20732⟩. ⟨hal-00572612⟩