caa a22 4500 465740049 CHVBK 20180323111806.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02364615 doi (NATIONALLICENCE)springer-10.1007/BF02364615 A new geometric procedure for In vivo pulsed doppler evaluation of velocity distribution inside the diametrical section of large arteries in humans [Elektronische Daten] [Patrice Flaud, Aziz Bensalah, Jean Counord, Jaime Levenson, Alain Simon] A new geometric procedure determination of velocity profiles inside large human arteries, such as the brachial and femoral, has been developed. The procedure requires the use of two crystal element Doppler probes and a highly precise micromanipulator with three degrees of freedom. Precise positioning is needed to obtain the required high degree of parallelism between the vessel axis and the plane containing the two crystal elements. Once the appropriate degree of parallelism is achieved, a controlled translation of the probe, perpendicular to the ultrasonic beam plane, allows velocity waveforms to be recorded at sequential radial positions across the measured artery. Velocity profiles obtained with this geometric procedure depended on the type of artery investigated. the profiles measured with the geometric procedure were more symmetrical than those found using the electronic range-gated time system of reception. While the geometric and electronic methods were almost identical in determining the diameter values of the three arteries measured, the geometric procedure enabled greater accuracy for detailed analysis of velocity profiles in the peripheral large arteries in humans. Although the present methodology is not applicable in clinical practice due to prolonged data acquisition time (approximately 45 s) it is expected that future equipment improvements will reduce this time significantly. Pergamon Press plc, 1990 Flaud Patrice Laboratoire de Biorhéologie et d'Hydrodynamique Physiologique (LBHP) UA CNRS 343, Université Paris VII, 2 Place Jussieu, 75005, Paris, France aut Bensalah Aziz Laboratoire d'Informatique et de Mathématiques Appliquées, CNCPRST, BP 1346 R.P., Rabat, Maroc aut Counord Jean Laboratoire de Biorhéologie et d'Hydrodynamique Physiologique (LBHP) UA CNRS 343, Université Paris VII, 2 Place Jussieu, 75005, Paris, France aut Levenson Jaime INSERM U-28, Hôpital Broussais, 96 Rue Didot, 75674, Paris Cedex 14 aut Simon Alain INSERM U-28, Hôpital Broussais, 96 Rue Didot, 75674, Paris Cedex 14 aut Annals of Biomedical Engineering Kluwer Academic Publishers 18/5(1990-09-01), 519-531 0090-6964 18:5<519 1990 18 10439 https://doi.org/10.1007/BF02364615 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02364615 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Flaud Patrice Laboratoire de Biorhéologie et d'Hydrodynamique Physiologique (LBHP) UA CNRS 343, Université Paris VII, 2 Place Jussieu, 75005, Paris, France aut NATIONALLICENCE 700 1- Bensalah Aziz Laboratoire d'Informatique et de Mathématiques Appliquées, CNCPRST, BP 1346 R.P., Rabat, Maroc aut NATIONALLICENCE 700 1- Counord Jean Laboratoire de Biorhéologie et d'Hydrodynamique Physiologique (LBHP) UA CNRS 343, Université Paris VII, 2 Place Jussieu, 75005, Paris, France aut NATIONALLICENCE 700 1- Levenson Jaime INSERM U-28, Hôpital Broussais, 96 Rue Didot, 75674, Paris Cedex 14 aut NATIONALLICENCE 700 1- Simon Alain INSERM U-28, Hôpital Broussais, 96 Rue Didot, 75674, Paris Cedex 14 aut NATIONALLICENCE 773 0- Annals of Biomedical Engineering Kluwer Academic Publishers 18/5(1990-09-01), 519-531 0090-6964 18:5<519 1990 18 10439 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer