Abstract
A mathematical model is outlined which describes the elastic modulus of an arterial segment in terms of the changes in phase of the harmonic components of the maximum blood velocity waveforms recorded at the extremities of the segment under study. An experimental method of obtaining the information transcutaneously using ultrasonic Doppler flow meters is described. Twelve subjects (8 male, 4 female) were taken and each subjected to whole body tilts feet down through 45°. Simultaneous measurements were made of the elastic constant and pulse wave velocity between the popliteal artery at the back of the knee and the posterior tibial at the side of the ankle in both the horizontal and tilted positions. A quantitative relationship was obtained between the elastic constant and the pulse wave velocity. A second group of ten males was taken and examined at weekly intervals over a period of one month. On each occasion they were tilted feet down through 45°; measurements were made of central arterial blood pressure and pulse wave velocity over the length of the lower limb. The elastic constant and mean blood pressure in the segment were calculated for both the horizontal and tilted position. The results obtained were compared with those reported elsewhere.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
