动态排粪造影的采集速度选择及其对功能性出口梗阻性便秘的诊断价值

Velocity selection of dynamic defecography and its diagnostic value in constipation of functional outlet obstruction

目的:研究动态排粪造影在功能性出口梗阻性便秘检查中的采集速度选择及其诊断价值。方法:采用数字胃肠机对便秘患者进行动态排粪造影检查,分别选用1帧/s、3帧/s及4帧/s的采集速度造影68、76及73例,然后分别对直肠前突、会阴下降及耻骨直肠肌痉挛综合征3类疾病进行测量。将3种采集速度检查所测数值进行统计学分析,寻求动态排粪造影的最佳采集速度,并评价其诊断价值。结果:1帧/s采集速度的动态排粪造影检查在3类疾病的测量及显示上与3帧/s和4帧/s检查的比较均有显著性差异,以后两种采集速度为好。而3帧/s与4帧/s采集速度的检查在3类疾病的测量与显示上无统计学意义的差别。结论:选用3帧/s及4帧/s的采集速度进行动态排粪造影检查,均能很好且准确地显示功能性出口梗阻性便秘的3类疾病,但综合患者接受射线剂量及X光机球管损耗的因素分析,3帧/s采集速度的动态排粪造影是最佳的检查方法。

Objective： To study the velocity selection of dynamic defecography in constipation of functional outlet obstruction, and evaluate its diagnostic value. Methods： The 217 patients with constipation of functional outlet obstruction underwent digital fluoroscopic imaging. The velocity selection of dynamic defeeography were selected as I frame per second, 3 and 4 frames per second. The imaging materials including all kinds of velocity and morphologie change of three kinds diseases were analyzed by a blind study, and the data were processed by statistics. Results： Significant differences in constipation of functional outlet obstruction were observed between I frame per second and 3 or 4 frames per second. The dynamic defeeography with 3 or 4 frames per second was superior to 1 frame per second. There were no differences between 3 frames per second and 4 frames per second. Conclusion： The dynamic defeeography with 3 or 4 frames per second can both present three kinds of diseases. But thinking o[ the X-ray dose which patient accepted and the waste of X-ray unit, the dynamic defeeography with 3 frames per second is a satisfactory method in diagnosing constipation of functional outlet obstruction.