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| Velocity selection of dynamic defecography and its diagnostic value in constipation of functional outlet obstruction |
| LEI Zhi-dan, JIA Wu-lin, WEN Ze-jun, LI Jian-min, REN Jin-xiang |
| Henan Provincial People’s Hospital, Zhengzhou 450003, China |
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Abstract 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 defecography were selected as 1 frame per second, 3 and 4 frames per second. The imaging materials including all kinds of velocity and morphologic 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 1 frame per second and 3 or 4 frames per second. The dynamic defecography 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 defecography with 3 or 4 frames per second can both present three kinds of diseases. But thinking of the X-ray dose which patient accepted and the waste of X-ray unit, the dynamic defecography with 3 frames per second is a satisfactory method in diagnosing constipation of functional outlet obstruction.
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Received: 07 July 2006
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2007, Vol. 18 
