MECHANICAL PROPERTY STUDIES OF HUMAN GALLSTONES

被引:6
作者
STRANNE, SK [1 ]
COCKS, FH [1 ]
GETTLIFFE, R [1 ]
机构
[1] DUKE UNIV,SCH ENGN,DEPT MECH ENGN & MAT SCI,DURHAM,NC 27706
来源
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH | 1990年 / 24卷 / 08期
关键词
D O I
10.1002/jbm.820240807
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
The recent development of gallstone fragmentation methods has increased the significance of the study of the mechanical properties of human gallstones. In the present work, fracture strength data and microhardness values of gallstones of various chemical compositions are presented as tested in both dry and simulated bile environments. Generally, both gallstone hardness and fracture strength values were significantly less than kidney stone values found in previous studies. However, a single calcium carbonate stone was found to have an outer shell hardness exceeding those values found for kidney stones. Diametral compression measurements in simulated bile conclusively demonstrated low gallstone fracture strength as well as brittle fracture in the stones tested. Based on the results of this study, one may conclude that the wide range of gallstone microhardnesses found may explain the reported difficulties previous investigators have experienced using various fragmentation techniques on specific gallstones. Moreover, gallstone mechanical properties may be relatively sensitive to bile‐environment composition. Copyright © 1990 John Wiley & Sons, Inc.
引用
收藏
页码:1049 / 1057
页数:9
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