Development of an ultrasonic probe to measure both radial arterial pressure and diameter change at the same position for early diagnosis of vascular endothelial function: Preliminary study

Mototaka Arakawa, Takumi Saito, Shohei Mori, Shigeo Ohba, Kazuto Kobayashi, Hiroshi Kanai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We have evaluated the viscoelastic properties of arterial walls by measuring the relationship from radial arterial pressure to the change in arterial diameter to evaluate vascular endothelial functions. In our previous study, these parameters were measured at different positions, which caused timing errors. In the present study, a novel probe was developed to measure both radial arterial pressure and the change in arterial diameter at the same position. The central piezoelectric element of the linear array probe was disconnected from the ultrasonic diagnostic equipment and used to measure the arterial pressure. To obtain the blood pressure waveform, the output was integrated and calibrated using the systolic and diastolic pressures measured by a conventional sphygmomanometer. The arterial diameter was measured using the other 191 elements of the ultrasonic diagnostic apparatus via the phased-tracking method. The hysteresis loop, which is the relationship between the change in diameter and instantaneous pressure during a heartbeat, and thus reflects the viscoelasticity of the arterial wall, was measured successfully. The reproducibility for successive two heartbeats was confirmed for two subjects.

Original languageEnglish
Article number111487
JournalSensors and Actuators, A: Physical
Volume297
DOIs
Publication statusPublished - 2019 Oct 1

Keywords

  • Blood pressure
  • Diameter
  • Piezoelectric effect
  • Radial artery
  • Ultrasonic probe
  • Viscoelasticity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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