Abstract：
:A novel apparatus for the multifaceted evaluation of artery function was developed. It measures endothelial and smooth muscle functions and the pressure-strain elastic modulus (E p). A rigid airtight chamber with an ultrasound probe was attached to the upper arm to manipulate the transmural pressure of the brachial artery. Endothelial function was measured via a standard flow-mediated dilation (FMD) protocol. Smooth muscle function was evaluated via a myogenic contraction of the artery following the application of negative pressure to the chamber and was named pressure-mediated contraction (PMC). E p was obtained by measuring the instantaneous increase in the artery diameter following the negative pressure application. The PMC and FMD values had a significant negative correlation with age, indicating that the age-related decrease in FMD is caused by the decay of endothelial and smooth muscle function. A consideration of PMC may help improve the accuracy of artery function measurement. E p in subjects aged >40 years was found to be significantly higher in the supra-physiological pressure range than in the physiological one (p = 0.02); this did not occur in younger subjects. Artery stiffening may begin in the supra-physiological range, and this stiffness may also be used for the diagnosis of atherosclerosis.
journal_name
Ann Biomed Engjournal_title
Annals of biomedical engineeringauthors
Yaguchi T,Cong Y,Shimo K,Kurokawa T,Sugita S,Nagayama K,Masuda H,Matsumoto Tdoi
10.1007/s10439-017-1810-zsubject
Has Abstractpub_date
2017-06-01 00:00:00pages
1487-1495issue
6eissn
0090-6964issn
1573-9686pii
10.1007/s10439-017-1810-zjournal_volume
45pub_type
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