Objective: to explore the causes of constipation by displaying the functional and anatomic abnormalities of continuity between anal canal and rectum with defecography.
目的通过便秘患者的排粪造影资料显示其肛管直肠形态及功能，寻找便秘原因。
Objective: to explore the causes of constipation by displaying the functional and anatomic abnormalities of continuity between anal canal and rectum with defecography.
目的通过便秘患者的排粪造影资料显示其肛管直肠形态及功能，寻找便秘原因。
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