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首页> 外文期刊>Journal of Biomechanics >Regional distribution of wall thickness and failure properties of human abdominal aortic aneurysm.
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Regional distribution of wall thickness and failure properties of human abdominal aortic aneurysm.

机译：人腹主动脉瘤壁厚和衰竭特性的区域分布。

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摘要

The regional distribution of wall thickness and failure properties in human abdominal aortic aneurysm (AAA) was explored. Three unruptured and one ruptured AAA were harvested as a whole during necropsy. Thickness was measured at about every 1.5 cm(2) wall surface area for an average of 100 measurement sites per AAA. Multiple longitudinally oriented rectangular specimen strips were cut at various locations from each AAA for a total of 48 strips. The strips were subjected to uniaxial extension until failure. Wall thickness varied regionally and between AAA from as low as 0.23 mm at a rupture site to 4.26 mm at a calcified site (median=1.48 mm). Wall thickness was slightly lower in the posterior and right regions. The failure tension (ultimate) of specimen strips varied regionally and between AAA from 5.5 N/cm close to a blister site in the ruptured AAA to 42.3N/cm at the undilated neck of a 4 cm diameter unruptured AAA (median=14.8 N/cm). Failure stress (ultimate) varied from 33.6 to 235.1N/cm(2) (median=126.6N/cm(2)). There was no perceptible pattern in failure properties along the circumference. Failure tension of specimen strips at or close to blisters was mostly low. The rupture site in the ruptured aneurysm had the lowest recorded wall thickness of 0.23 mm with only slightly higher readings within a 1cm radius. The failure tension of the specimen strip close to the rupture site was low (11.1 N/cm) compared to its neighborhood in the ruptured aneurysm.
机译：探讨了人腹主动脉瘤（AAA）壁厚和衰竭特性的区域分布。尸检期间整体收获了3枚未破裂的AAA和1枚破裂的AAA。在大约每1.5 cm（2）壁表面积处测量厚度，每个AAA平均测量100个测量位置。从每个AAA的不同位置切下多个纵向取向的矩形样品条，总共48条。将条带进行单轴延伸直到破坏。壁厚在区域内变化，在AAA范围内从破裂部位的0.23毫米到钙化部位的4.26毫米（中位数= 1.48毫米）不等。后壁和右壁的壁厚略低。样品条的破坏张力（最终）在区域内变化，在AAA范围内从AAA破裂的水泡附近的5.5 N / cm到直径为4 cm的AAA的未扩张颈部的42.3N / cm（中位数为14.8 N /厘米）。破坏应力（最终）从33.6到235.1N / cm（2）（中位数= 126.6N / cm（2））不等。沿圆周的破坏特性没有可察觉的模式。在水泡处或接近水泡处的试样带的破坏张力大多较低。破裂的动脉瘤中的破裂部位记录的最低壁厚为0.23 mm，在1cm半径范围内读数略高。与破裂动脉瘤附近相比，靠近破裂部位的标本条的破坏张力低（11.1 N / cm）。

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