中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (16): 2956-2960.doi: 10.3969/j.issn.2095-4344.2013.16.015

• 细胞外基质材料 extracellular matrix materials • 上一篇    下一篇

胎儿脐静脉移植材料的应力松弛特性

许东辉1,李东原1,李新颖1,丁红月2   

  1. 1吉林大学中日联谊医院神经外科,吉林省长春市  130031
    2长春吉柴医院妇产科,吉林省长春市  130031
  • 收稿日期:2012-07-10 修回日期:2012-08-09 出版日期:2013-04-16 发布日期:2013-04-16
  • 通讯作者: 许东辉,主治医师,吉林大学中日联谊医院神经外科,吉林省长春市 130031
  • 作者简介:许东辉★,男,1971年生,朝鲜族,吉林省长春市人,2005年吉林大学毕业,硕士,主治医师,主要从事神经外科科临床与生物医学工程研究。 mahs@jlu.edu.cn

Stress relaxation properties of fetal umbilical cord vein grafts

Xu Dong-hui1, Li Dong-yuan1, Li Xin-ying1, Ding Yue-hong2   

  1. 1 Department of Neurosurgery, China-Japan Union Hospital of Jilin University, Changchun  130031, Jilin Province, China
    2 Department of Gynecology and Obstetrics, Jichai Hospital of Changchun, Changchun  130031, Jilin Province, China
  • Received:2012-07-10 Revised:2012-08-09 Online:2013-04-16 Published:2013-04-16
  • Contact: Xu Dong-hui, Department of Neurosurgery, China-Japan Union Hospital of Jilin University, Changchun 130031, Jilin Province, China mahs@jlu.edu.cn
  • About author:Xu Dong-hui★, Master, Attending physician, Department of Neurosurgery, China-Japan Union Hospital of Jilin University, Changchun 130031, Jilin Province, China

摘要:

背景:人脐静脉是动脉移植物的良好替代材料,在移植时除了考虑脐静脉与宿主动脉相匹配外,还应注意其顺应性。
目的:检测胎儿脐静脉近胎盘段和远胎盘段试样的应力松弛特性。
方法:取22-28岁、胎龄38-40周、自然分娩产妇的正常胎儿脐静脉近胎盘段和远胎盘段各10个试样,在电子万能实验机上进行应力松弛实验,在(36.5±0.5) ℃的温度场下,以0.1%/s的应变增加速度对试样施加应变,设定时间为7 200 s。采集100个数据,采用归一化分析的方法计算两组试样的归一化应力松弛方程。
结果与结论:脐静脉近胎盘段组7 200 s应力下降了0.275 MPa,脐静脉远胎盘段组7 200 s应力下降了0.203 MPa,两组7 200 s应力下降量差异有显著性意义(P < 0.05)。两组试样应力松弛曲线是以对数关系变化的,并且胎儿脐静脉近胎盘段和远胎盘段具有不同的应力松弛特性。

关键词: 生物材料, 细胞外基质材料, 胎儿, 脐静脉, 近胎盘段, 远胎盘段, 应力松弛, 对比分析

Abstract:

BACKGROUND: Human umbilical cord vein can serve as a good substitute for arterial grafts. Compliance of graft materials is a key problem during the transplantation expect for the matching between the umbilical   cord vein and host’s artery.
OBJECTIVE: To detect the stress relaxation properties of fetal umbilical vein samples proximal and distal to the placenta.
METHODS: Fetal umbilical vein samples at the gestational age of 38-40 were taken from spontaneous delivery parturient women aged 22-28 years. Ten proximal placenta segments and 10 distal placenta segments were taken and placed on the electronic universal testing machine to do the stress relaxation test at (36.5±0.5) ℃. The strain was applied to the samples at a strain increases speed of 0.1%/s, and the setting time was 7 200 seconds. Totally 100 data were collected; and then, the normalized analysis method was employed to calculate the normalized stress relaxation equation.
RESULTS AND CONCLUSION: The stress at 7 200 seconds was decreased by 0.275 MPa in the proximal placenta segment group and 0.203 MPa in the distal placenta segment group. There was a significant difference between the two segment samples (P < 0.05). The stress relaxation curves of the two groups were changed with logarithmic relationship, and the proximal placenta segment and the distal placenta segment of fetal umbilical cord vein had different stress relaxation properties.

Key words: biomaterials, extracellular matrix materials, fetus, umbilical cord vein, proximal placenta segment, distal placenta segment, stress relaxation, contrast analysis

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