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

Journal of China Clinic Medical Imaging ›› 2007, Vol. 18 ›› Issue (2) : 130-132.

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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

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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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constipation / diagnostic techniques / digestive system

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LEI Zhi-dan;JIA Wu-lin;WEN Ze-jun;LI Jian-min;REN Jin-xiang. Velocity selection of dynamic defecography and its diagnostic value in constipation of functional outlet obstruction[J]. Journal of China Clinic Medical Imaging. 2007, 18(2): 130-132