顺应性测试条件对纺织人工血管径向顺应性的影响

发布时间：2018-12-10 14:13

【摘要】：目的分析纺织人工血管试样的预加张力和测试位置,探讨影响人工血管径向顺应性的因素。方法基于人工血管动态顺应性测试仪,通过变化试样轴向预加张力以及调整试样直径测试观察点位置,对3种内直径8 mm的纺织人工血管试样,测试不同脉动压力值及其所对应的径向直径值。根据ISO 7198-1998顺应性计算方法,获得不同实验条件下的径向顺应性值。结果随着预加张力的增大,3种纺织人工血管径向顺应性也随之增大,当预加张力达到500~550 mN时,径向顺应性值达到最大(1.03~1.72)%/100 mmHg(1 mmHg=0.133 kPa),之后随着预加张力的增大而降低。此外,PET波纹化经编人工血管的径向顺应性值显示波谷径向顺应性值略大于波峰,而波峰的径向顺应性值稳定性好于波谷。结论预加张力和测试位置对纺织人工血管径向顺应性有较大的影响,在测试时应给试样的预加张力为500~550 mN,对于波纹化纺织人工血管应选择波峰处为测试位置,结果更加稳定,数据更加可靠。
[Abstract]:Objective to investigate the factors affecting radial compliance of textile artificial blood vessels. Methods based on the dynamic compliance tester of artificial blood vessel, three kinds of textile artificial blood vessel samples with 8 mm internal diameter were tested by changing the axial pretension and adjusting the observation point position of the sample diameter. The values of different pulsating pressures and their corresponding radial diameters were measured. According to the ISO 7198-1998 compliance calculation method, the radial compliance values under different experimental conditions were obtained. Results the radial compliance of the three textile artificial blood vessels increased with the increase of pretension. When the pre-tension reached 500 ~ 550 mN, the radial compliance reached the maximum value (1.03 卤1.72)% / 100 mmHg (1 mmHg=0.133 kPa),). Then it decreases with the increase of pretension. In addition, the radial compliance of PET corrugated warp-knitted artificial blood vessels shows that the radial compliance of the trough is slightly greater than that of the peak, and the stability of the radial compliance of the wave peak is better than that of the trough. Conclusion Pre-tension and test location have great influence on the radial compliance of textile artificial blood vessels. The pre-tension should be 500 ~ 550 mN, for corrugated textile artificial blood vessels, and the test results are more stable. The data are more reliable.
【作者单位】：东华大学纺织学院纺织面料技术教育部重点实验室;
【基金】：国家教育部博士点基金项目(20100075110001) 高等学校学科创新引智计划资助项目(B07024)
【分类号】：R318.1

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