Chinese Journal of Clinical Anatomy >
Nonlinear finite element simulations of perforator vessels twist in perforator pedicled propeller flaps
Received date: 2013-09-09
Online published: 2014-04-21
Objectives To investigate the effects of some parameters (tension-stretch, number of concomitant vein and interval between perforator artery and vein) on the vascular patency after twisting of the perforator pedicle in perforator pedicled propeller flaps. Methods LSDYNA software was used to establish a three-dimensional nonlinear digital model of perforator consisting of an artery and a vein with both ends fixed. In Group 1, the perforator pedicle was twisted in isometric and isotonic conditions; in Group 2, the perforator pedicle was twisted with 1 concomitant vein and 2 concomitant veins; and in Group 3, the pedicle was twisted in the interval of 0 mm, 2 mm, 4 mm and 6 mm between the perforator artery and vein, respectively. In each group, all perforator pedicles were rotated from 0° to 180°. The effective strain was obtained to represent the perforator patency. Results In Group 1, the effective strain of perforator pedicle in isotonic condition was smaller (more patency) than that in isometric; in Group 2, the effective strain of perforator pedicle with 2 concomitant veins was larger than that of 1 concomitant vein, but the total lumen open area of the 2 veins was still greater than 1 vein; in Group 3, the effective strain of perforator pedicle increased (less patency) as the interval increased from 0 mm to 6 mm. Conclusions (1) The patency of the twisted perforator vessels is decreased when tension-stretching is added on the perforator pedicle. (2) The venous patency of preserving 2 concomitant veins is better than that of only 1 vein after the perforator-pedicle torsion. (3) The patency of the perforator is decreased when the interval between perforator artery and vein is increased.
DAO You-Lun , ZHANG Shi-Min , CHEN Wen-Long , ZHANG Yang-Qi , WANG Xin , LIU Tian-Yi , MA Fei , GU Yu-Dong . Nonlinear finite element simulations of perforator vessels twist in perforator pedicled propeller flaps[J]. Chinese Journal of Clinical Anatomy, 2014 , 32(2) : 201 -205 . DOI: 10.13418/j.issn.1001-165x.2014
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