AI Article Synopsis
- This study investigates the stiffness of human carotid arteries, particularly focusing on layers affected by atherosclerosis (type II and III lesions).
- Researchers conducted uniaxial tests on 71 specimens from six carotid arteries, categorizing them by axial and circumferential orientations of the media and adventitia layers.
- The results indicated that the adventitia is significantly stiffer than the media in both directions, with mean stiffness values of 3570 kPa (axial) and 2960 kPa (circumferential) for adventitia, compared to 1070 kPa (axial) and 1800 kPa (circumferential) for media.
Article Abstract
Arteries can be considered as layered composite material. Experimental data on the stiffness of human atherosclerotic carotid arteries and their media and adventitia layers are very limited. This study used uniaxial tests to determine the stiffness (tangent modulus) of human carotid artery sections containing American Heart Association type II and III lesions. Axial and circumferential oriented adventitia, media, and full thickness specimens were prepared from six human carotid arteries (total tissue strips: 71). Each artery yielded 12 specimens with two specimens in each of the following six categories; axial full thickness, axial adventitia (AA), axial media (AM), circumferential full thickness, circumferential adventitia (CA), and circumferential media (CM). Uniaxial testing was performed using Inspec 2200 controlled by software developed using labview. The mean stiffness of the adventitia was 3570 ± 667 and 2960 ± 331 kPa in the axial and circumferential directions, respectively, while the corresponding values for the media were 1070 ± 186 and 1800 ± 384 kPa. The adventitia was significantly stiffer than the media in both the axial (p = 0.003) and circumferential (p = 0.010) directions. The stiffness of the full thickness specimens was nearly identical in the axial (1540 ± 186) and circumferential (1530 ± 389 kPa) directions. The differences in axial and circumferential stiffness of media and adventitia were not statistically significant.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5686769 | PMC |
| http://dx.doi.org/10.1115/1.4037794 | DOI Listing |
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