Longitudinal stress and strain of normal human vascular system of the extremities, and the blood vessels following venous repair / 中华骨科杂志

ABSTRACT

Objective To investigate the longitudinal residue strain and stress-strain relation of normal human vascular system of the extremities and the relation between the different defect length and the option of repair, as well as a comparison of the different selection of the methods of repair judged from the longitudinal biomechanical effect. Methods A mechanical analysis including stretch experiment and longitudinal stretch ratio measurement were undertaken to evaluated the longitudinal residue strain and stress-strain relation of arteries and veins of the extremities in human. The results of different methods for repair of the defect of the same kind of vessels were compared with Student-t test. The length precinct to repair arterial injuries between end-to-end anastomoses and vein graft through 95％ distribution region was evaluated. Results The longitudinal stretch ratio of arterial system of the extremities decreased from the proximal to the distal ends of the vascular branches and the stress-strain relation curve of artery turned gradually to the right side, while that of veinous system exhibited a contrary picture. There was significant difference among the stretch ratio of artery and those of branchiocephalic vein or great saphenous vein (P