EFFECT OF STOOL SIZE AND CONSISTENCY ON DEFECATION
EFFECT OF STOOL SIZE AND CONSISTENCY ON DEFECATION
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DOI：
10.1136/gut.28.10.1246
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发表时间：
1987-10-01
期刊：
影响因子：
24.5
通讯作者：
READ, NW
中科院分区：
文献类型：
--
作者：
BANNISTER, JJ;DAVISON, P;READ, NW
受试者从直肠排出模拟不同特征粪便的对象的能力进行了评估，在配对的研究中进行了总共58名正常人和25名严重便秘的年轻女性。我们的研究结果表明，正常受试者和便秘患者的百分比较低，能够通过一个1.8厘米的不可压缩的球体相比，一个50毫升的可变形的气球，虽然便秘患者发现它比正常受试者更难排出两种类型的模拟粪便。对于正常受试者来说，通过软的可压缩的硅橡胶刺激的粪便比由圆柱形乳胶封套中包含的不可压缩的1 cm木质球体组成的粪便更困难，但这两种物体都比松散放置在直肠内的相同数量的1 cm球体更容易通过。当正常受试者被指示排出放置在直肠壶腹中的不同大小的单个不可压缩球体时，直肠内压力和通过这些物体所需的时间与它们的直径成反比。这些结果表明，如果粪便小而硬，比大而软，则需要更多的努力才能将粪便从直肠排出。
The ability of subjects to expel from the rectum objects simulating stools of different characteristics was assessed in paired studies carried out in a total of 58 normal subjects and 25 young women with severe constipation. Our results showed that a lower percentage of normal subjects and a lower percentage of constipated patients were able to pass a 1.8 cm incompressible sphere compared with a 50 ml deformable balloon, although constipated patients found it more difficult than normal subjects to expel both types of simulated stool. It was also more difficult for normal subjects to pass a soft compressible silicon rubber stimulated stool than a stool made up of a similar volume of incompressible 1 cm wooden spheres contained in a cylindrical latex envelope, but both objects were much easier to pass than the same number of 1 cm spheres placed loose within the rectum. When normal subjects were instructed to expel single incompressible spheres of different sizes placed in the rectal ampulla, the intrarectal pressure and the time needed to pass these objects varied inversely with their diameter. These results suggest that more effort is required to expel stools from the rectum if they are small and hard than if they are large and soft.