小径人工血管的径向顺应性测定

Measurement of Radial Compliances of Small Diameter Artificial Vascular Graft

【目的】设计小径人工血管的径向顺应性测量的方法和装置。【方法】由激光测微器、压力传感器、A/D卡、微电脑和脉动循环回路等部件制成血管顺应性测定装置,血管外径信号由激光测微器记录,内腔压力信号由压力传感器记录,经A/D转换和微电脑处理,两者的波形和数值均在显示器上实时和同步显示。【结果】该装置的压力测量范围0～300mmHg,分辨率0.015mmHg,直径测量范围0～9mm,分辨率0.005mm,对各种尺寸和性质的人工血管的径向顺应性的测量结果表明,能满足使用要求。【结论】该装置和方法可测量内径2～4mm,顺应性大于1.0×10-2·%/mmHg的各种规格小径人工血管的径向顺应性,是小径人工血管性能研究的一种工具。

To design a method and a device to measure radial compliances of small diameter artificial vascular graft.A device was made by a laser micromete r,a pressure transducer,a A /D card,a computer,and a pulsed circulation loop.The size signals of grafts external diameter were picked by the laser micrometer,the pressure sign als were picked by the pressure transducer and transforme d by A /D card and the computer to wave f orms and digital data,that were displayed synchronously o n the monitor of computer in real time .For the device diameter measured was in the range of0～9mm and the resolution was in 0.005mm,the pressure measured was in the range of 0～300mmH g and the resolution was in 0.015mmHg .Small diameter artificial vascular grafts with different dimension and property were measured.The results showed that the device could meet demands for mea suring radial compliance of those grafts.[Conclusion]This device can measure artificial vascu lar grafts with internal diameter in2～4mm and radial compliance in more than 1.0×10 -2 ·%/mmHg.It is a new tool for studying p roperty of artificial vascular graft.