摘要
为脐带静脉作为小口径移植材料的临床应用提供蠕变特性指标。对产妇年龄在22～28岁,胎龄37～40周自然分娩正常胎儿脐带静脉近胎盘段和远胎盘段各10个试样在日本岛津电子万能试验机上进行蠕变实验,模拟人体温在36.5±0.5℃的温度场下以0.01 Mpa/s的应力增加速度对试样施加应力,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蠕变方程。两组试样蠕变曲线是以指数关系变化的,胎儿脐带静脉近胎盘段和远胎盘段7 200 s蠕变量差异显著(P<0.05)。胎儿脐带静脉近胎盘段和远胎盘段具有不同的蠕变特性。
To provide the creep properties index for the clinical application of making the umbilical cord as small diameter graft material.Taking the natural childbirth normal fetuses' umbilical vein sample that the age was in 22~28,the gestational age was in 38~40 weeks,and then put ten samples of the proximal placenta segment and the distal placenta segment respectively on the electronic universal testing machine to do the creep test.The human body′s temperature was simulated at 36.5±0.5℃,and the stress was applied to the sample with 0.01MPa/s stress increases speed,the setting time was 7 200 s.100 data were collected,then the normalized analysis method was used to calculate the two samples' normalized creep equation.The creep curves of two groups′ samples were changed with logarithmic relationship,the creeps of proximal placenta segment and the distal placenta segment of fetus umbilical cord vein at 7200s had significant difference(P<0.05).The proximal placenta segment and the distal placenta segment of fetus umbilical cord vein have different creep properties.
出处
《生物医学工程研究》
2012年第2期103-106,共4页
Journal Of Biomedical Engineering Research
关键词
胎儿
脐带静脉
近胎盘段
远胎盘段
蠕变
对比分析
Fetus
Umbilical cord vein
Proximal placenta segment
Distal placenta segment
Creep contrast analysis
