The study of 640-slice CT voiding urography of posterior urethra in the diagnosis of bladder outlet obstruction caused by benign prostatic hyperplasia

doi:10.3877/cma.j.issn.1674-3253.2020.02.006

Abstract

Abstract:

Objective

To investigate the value of 640-slice dynamic computed tomography voiding urography(DVCT VUPU) of posterior urethra in the diagnosis of bladder outflow obstruction (BOO) caused by benign prostatic hyperplasia(BPH).

Methods

The data of 60 patients with clinically diagnosed BOO due to BPH and 34 cases without BOO as control group from December 2013 to December 2018 were analyzed retrospectively. All cases underwent DVCT-VUPU in the same period. The data of all phases were imported into minics. The 3D images of the lower urinary tract with the largest volume were marked. The influence was analyzed by logistic regression and receiver operating characteristic(ROC) curve.

Result

The urethra length and dimension of posterior lobe of prostate gland was independent and valid index for diagnosis of BOO due to BPH. The area under curve(AUC) of dimension of posterior lobe of prostate gland, urethra length was 0.984, 0.961, respectively, The susceptibility to diagnosis of BOO due to BPH was 100% and 93.1%, and the specificity was 86.7% and 93.3%, respectively.

Conclusion

640-slice DVCT voiding urography could display the whole urethra and bladder during the voiding scanning in patients with BPH, which showed advantages including non-invasive, clear images and images could be observed in any direction during the voiding scanning. It provided a technique to make quantitative and comprehensive diagnosis of BOO secondary to BPH.

Key words: Benign prostatic hyperplasia, Tomography, X-ray computed, Urography, Posterior urethral, Urodynamics

Song Li, Jieying Wu, Yunshan Su, Chongwen Mao, Qian Cai. The study of 640-slice CT voiding urography of posterior urethra in the diagnosis of bladder outlet obstruction caused by benign prostatic hyperplasia[J]. Chinese Journal of Endourology(Electronic Edition), 2020, 14(02): 100-105.

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References 21

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项目	无梗阻	前列腺增生导致梗阻	P值	诊断前列腺增生导致梗阻的ROC曲线下面积
前列腺后叶厚度（mm）	11.7±2.7	24.3±6.2.	<0.05	0.984
尿道长度（mm）	32±4	50±10	<0.05	0.961
前列腺体积（cm³）	24±7	49±24	<0.05	0.908
尿道直线长度（mm）	28±4	37±5.	<0.05	0.898
尿道弯曲度	1.16±0.07	1.35±0.15	<0.05	0.892
前列腺上下径（mm）	31±5	42±7.	<0.05	0.880
入口长宽比	1.19±0.12	1.91±0.68	<0.05	0.878
前列腺前后径（mm）	36±7	45±9	<0.05	0.806
前列腺横径（mm）	41±5	48±10	<0.05	0.694
入口长径（mm）	13±4	14±4	0.456	-
尿道表面积（mm²）	1099±263	1122±314	0.792	-
入口面积（mm²）	127±72	91±48	<0.05	0.687
尿道体积（mm³）	1873±737	1197±516	<0.05	0.567
入口短径（mm）	11.3±3.3	7.9±2.5	<0.05	0.621
出口长径（mm）	5.8±1.7	3.4±1.0	<0.05	0.687
尿道平均面积	58±24	25±13	<0.05	0.510
出口短径（mm）	5.03±1.40	2.72±0.98	<0.05	0.490
出口面积（mm²）	24.3±12.7	7.8±5.4	<0.05	0.540

项目	无梗阻	前列腺增生导致梗阻	P值	诊断前列腺增生导致梗阻的ROC曲线下面积
前列腺后叶厚度（mm）	11.7±2.7	24.3±6.2.	<0.05	0.984
尿道长度（mm）	32±4	50±10	<0.05	0.961
前列腺体积（cm³）	24±7	49±24	<0.05	0.908
尿道直线长度（mm）	28±4	37±5.	<0.05	0.898
尿道弯曲度	1.16±0.07	1.35±0.15	<0.05	0.892
前列腺上下径（mm）	31±5	42±7.	<0.05	0.880
入口长宽比	1.19±0.12	1.91±0.68	<0.05	0.878
前列腺前后径（mm）	36±7	45±9	<0.05	0.806
前列腺横径（mm）	41±5	48±10	<0.05	0.694
入口长径（mm）	13±4	14±4	0.456	-
尿道表面积（mm²）	1099±263	1122±314	0.792	-
入口面积（mm²）	127±72	91±48	<0.05	0.687
尿道体积（mm³）	1873±737	1197±516	<0.05	0.567
入口短径（mm）	11.3±3.3	7.9±2.5	<0.05	0.621
出口长径（mm）	5.8±1.7	3.4±1.0	<0.05	0.687
尿道平均面积	58±24	25±13	<0.05	0.510
出口短径（mm）	5.03±1.40	2.72±0.98	<0.05	0.490
出口面积（mm²）	24.3±12.7	7.8±5.4	<0.05	0.540

变量	B	S.E.	Wald	df	Sig.	Exp (B)
前列腺后叶厚度（mm）	1.105	0.474	5.432	1	0.02	3.018
尿道长度（mm)	0.521	0.187	7.816	1	0.005	1.684
常量	-17.566--	7.791	5.083	1	0.024	0

变量	B	S.E.	Wald	df	Sig.	Exp (B)
前列腺后叶厚度（mm）	1.105	0.474	5.432	1	0.02	3.018
尿道长度（mm)	0.521	0.187	7.816	1	0.005	1.684
常量	-17.566--	7.791	5.083	1	0.024	0

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