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Insensitivity of tensile failure properties of human bridging veins to strain rate: implications in biomechanics of subdural hematoma.

Authors
  • Lee, M C1
  • Haut, R C
  • 1 Institute of Biomedical Engineering, National Yang-Ming Medical College, Taipei, Taiwan, R.O.C. , (Taiwan)
Type
Published Article
Journal
Journal of Biomechanics
Publisher
Elsevier
Publication Date
Jan 01, 1989
Volume
22
Issue
6-7
Pages
537–542
Identifiers
PMID: 2808439
Source
Medline
License
Unknown

Abstract

The effects of strain rate on tensile failure properties of human parasagittal bridging veins were studied in eight unembalmed cadavers. While bathed in physiological saline at 37 degrees C, the intact vessel was stretched axially by a servo-controlled hydraulic testing machine at either a low strain rate of 0.1-2.5 s-1 or a high rate of 100-250 s-1. The mean ultimate stretch ratios for low and high strain rates, respectively, were 1.51 +/- 0.24 (S.D. n = 29) and 1.55 +/- 0.15 (n = 34), and the ultimate stresses were 3.24 +/- 1.65 (n = 17) and 3.42 +/- 1.38 MPa (n = 20). Neither difference between strain rates was significant (p greater than 0.45). Thus, our results do not support the hypothesis that sensitivity of the ultimate strain of bridging veins to strain rate explains the acceleration tolerance data for subdural hematoma in primates [Gennarelli, R. A. and Thibault, L. E. (1982) Biomechanics of acute subdural hematoma. J. Trauma 22, 680-686].

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