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A piece-wise non-linear elastic stress expression of human and pig coronary arteries tested in vitro.

Publication ,  Journal Article
Carmines, DV; McElhaney, JH; Stack, R
Published in: Journal of biomechanics
January 1991

Eight human and nineteen pig unembalmed proximal left anterior descending and circumflex coronary arteries were subjected to linear volume changes (2 s ramp time) at three fixed axial extensions while immersed in a physiological saline bath at body temperature. Measured parameters included: lumen pressure, outside diameter, axial force, and axial extension. The deformations were measured using a video dimensional analyzer. The arteries were inflated to pressures well above the physiological range at each axial extension. A latex inner tube was placed inside of each specimen to prevent leakage, and its effects upon the measured stresses were corrected analytically. With this method, the average circumferential and axial stresses could be computed directly from the experimental data. In both directions the average stresses measured displayed two distinct regions: stresses occurring for small diameter changes (physiological pressures) and stresses occurring for large diameter changes (high pressures). The resulting average small strain and large strain stress components were curve-fit separately and, when reassembled, provided a piece-wise model of the stress response of coronary arteries over a wide range of inflation pressures and axial extensions.

Duke Scholars

Published In

Journal of biomechanics

DOI

EISSN

1873-2380

ISSN

0021-9290

Publication Date

January 1991

Volume

24

Issue

10

Start / End Page

899 / 906

Related Subject Headings

  • Viscosity
  • Video Recording
  • Swine
  • Stress, Mechanical
  • Pressure
  • Models, Cardiovascular
  • Humans
  • Elasticity
  • Coronary Vessels
  • Biomedical Engineering
 

Citation

APA
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ICMJE
MLA
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Carmines, D. V., McElhaney, J. H., & Stack, R. (1991). A piece-wise non-linear elastic stress expression of human and pig coronary arteries tested in vitro. Journal of Biomechanics, 24(10), 899–906. https://doi.org/10.1016/0021-9290(91)90168-m
Carmines, D. V., J. H. McElhaney, and R. Stack. “A piece-wise non-linear elastic stress expression of human and pig coronary arteries tested in vitro.Journal of Biomechanics 24, no. 10 (January 1991): 899–906. https://doi.org/10.1016/0021-9290(91)90168-m.
Carmines DV, McElhaney JH, Stack R. A piece-wise non-linear elastic stress expression of human and pig coronary arteries tested in vitro. Journal of biomechanics. 1991 Jan;24(10):899–906.
Carmines, D. V., et al. “A piece-wise non-linear elastic stress expression of human and pig coronary arteries tested in vitro.Journal of Biomechanics, vol. 24, no. 10, Jan. 1991, pp. 899–906. Epmc, doi:10.1016/0021-9290(91)90168-m.
Carmines DV, McElhaney JH, Stack R. A piece-wise non-linear elastic stress expression of human and pig coronary arteries tested in vitro. Journal of biomechanics. 1991 Jan;24(10):899–906.
Journal cover image

Published In

Journal of biomechanics

DOI

EISSN

1873-2380

ISSN

0021-9290

Publication Date

January 1991

Volume

24

Issue

10

Start / End Page

899 / 906

Related Subject Headings

  • Viscosity
  • Video Recording
  • Swine
  • Stress, Mechanical
  • Pressure
  • Models, Cardiovascular
  • Humans
  • Elasticity
  • Coronary Vessels
  • Biomedical Engineering