Predictive value of Hounsfield unit on CT during flexible ureteroscopy with holmium laser lithotripsy

doi:10.3877/cma.j.issn.1674-3253.2017.05.003

Abstract

Abstract:

Objective

To evaluate the effect of Hounsfield unit (Hu) value of flexible ureteroscopy with holmium laser lithotripsy.

Methods

From September 2014 to December 2016, a total of 98 cases of renal calculi in Danyang People's Hospital were collected, 72 patients among them with similar stone sizes and localization, and their preoperative Hu value were measured. According to the Hu value above 1000 Hu (>1 000 Hu) or below 1000 Hu (1 000 Hu), patients were divided into two groups. Then the operative time, complications, and the stone-free rate at postoperative 3 months were compared between the two groups.

Results

The age, male to female ratio and the stone size between the two group had no significant differences (P>0.05). The operative time of the two groups were (82±13) min and (113±13) min, respectively, which had significant differences (P<0.01); the incidence of complications were 5% and 14.7%, respectively, which had no significant differences (P=0.334); Stone-free rate at postoperative 3 months were 94.7% and 91.1%, respectively, which had no significant differences (P=0.955).

Conclusions

Preoperative measurement of stone HU value could be an indicator to assess time and effeciency of flexible and effeciency ureteroscopy with holmium laser lithotripsy efficiency, help the urologists to evaluate the difficulty and the risk of surgery.

Key words: Flexible ureteroscopy, Holmium laser, Stone hounsfield units

Yi Peng, Qiang Bu, Suobing Qing, Dongfang Jiang, Minghui Zeng, Songyi Ning. Predictive value of Hounsfield unit on CT during flexible ureteroscopy with holmium laser lithotripsy[J]. Chinese Journal of Endourology(Electronic Edition), 2017, 11(05): 302-305.

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References 15

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组别	例数	年龄（岁）	性别（例）		肾下盏结石（例）	合并症（例）	结石直径（cm，±s）	手术时间（min，±s）	并发症[例（%）]	术后3个月清石率[例（%）]
组别	例数	年龄（岁）	男	女	肾下盏结石（例）	合并症（例）	结石直径（cm，±s）	手术时间（min，±s）	并发症[例（%）]	术后3个月清石率[例（%）]
低CT值组	38	40±10	26	12	21	4	1.74±0.28	082±13	2(5%)	36(94.7%)
高CT值组	34	39±12	20	14	14	6	1.84±0.26	113±13	5(14.7%)	31(91.1%)
统计值	?	t=0.397^a	χ²=0.613^b		χ²=2.013^b	χ²=0.142^c	t=-1.97^a	t=-11.6^a	χ²=0.934^c	χ²=0.003^c
P值	?	0.692a	0.434b		0.156b	0.706	0.52a	<0.001	0.334c	0.955c

组别	例数	年龄（岁）	性别（例）		肾下盏结石（例）	合并症（例）	结石直径（cm，±s）	手术时间（min，±s）	并发症[例（%）]	术后3个月清石率[例（%）]
组别	例数	年龄（岁）	男	女	肾下盏结石（例）	合并症（例）	结石直径（cm，±s）	手术时间（min，±s）	并发症[例（%）]	术后3个月清石率[例（%）]
低CT值组	38	40±10	26	12	21	4	1.74±0.28	082±13	2(5%)	36(94.7%)
高CT值组	34	39±12	20	14	14	6	1.84±0.26	113±13	5(14.7%)	31(91.1%)
统计值	?	t=0.397^a	χ²=0.613^b		χ²=2.013^b	χ²=0.142^c	t=-1.97^a	t=-11.6^a	χ²=0.934^c	χ²=0.003^c
P值	?	0.692a	0.434b		0.156b	0.706	0.52a	<0.001	0.334c	0.955c

变量	OR	95%CI		Wald	P值
变量	OR	上限	下限	Wald	P值
年龄	1.024	0.995	01.106	3.239	0.082
男性因素	3.723	0.406	33.234	1.526	0.235
Hu>1 000	0.803	0.148	04.341	0.049	0.719

变量	OR	95%CI		Wald	P值
变量	OR	上限	下限	Wald	P值
年龄	1.024	0.995	01.106	3.239	0.082
男性因素	3.723	0.406	33.234	1.526	0.235
Hu>1 000	0.803	0.148	04.341	0.049	0.719

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