Hounsfield units on computerized tomography predict stone-free rates after extracorporeal shock wave lithotripsy
Hounsfield units on computerized tomography predict stone-free rates after extracorporeal shock wave lithotripsy
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DOI：
10.1097/01.ju.0000055608.92069.3a
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发表时间：
2003-05-01
影响因子：
6.6
通讯作者：
Fracchia, JA
中科院分区：
文献类型：
--
作者：
Pareek, G;Armenakas, NA;Fracchia, JA
目的：研究表明，非对比计算机断层扫描的HU值可以预测粉碎尿路结石的能力。我们确定是否在体内泌尿系结石的HU可以用来预测体外冲击波lithotripsy.Materials和方法后的结石清除率：我们评估了50例接受体外。冲击波碎石术治疗5 ~ 10 mm上尿路结石对每个结石进行化学分析和HU计算，治疗后影像学评估将患者分为无结石组或残留结石组。统计分析采用学生t检验比较平均HU值在2 group.Results：患者32（64%）是无结石和18（36%）有残留结石。无结石组和残留结石组的平均值+/-SEM存在显著差异（551.20 +/- 46.66与926.20 +/- 51.42 HU，p < 0.0001）。共有30例结石（60%）位于输尿管，其中无结石组21例，残留结石组9例，平均值分别为505.10 +/- 46.66和888.70 +/- 102.00 HU，差异显著（p = 0.0005）。共20个结石（40%）位于肾脏，其中无结石组11个，残留结石组9个，平均值分别为558.40 ± 62.38和905.10 ± 61.49 HU，差异有统计学意义结论：这些发现表明，治疗前非对比CT上的尿结石HU测量可以预测结石清除率。这些信息可能有助于为尿路结石患者选择首选治疗方案。
Purpose: Studies suggest that HU values on noncontrast computerized tomography may predict the ability to fragment urinary calculi. We determined whether the HUs of in vivo urinary stones could be used to predict the stone-free rates after extracorporeal shock wave lithotripsy.Materials and Methods: We evaluated 50 patients who underwent extracorporeal. shock wave lithotripsy for 5 to 10 mm. upper urinary tract stones. Chemical analyses and HU calculations were performed for each stone and posttreatment radiographic assessment categorized patients into a stone-free or a residual stone group. Statistical analysis was performed using the Student t test to compare mean HU values in the 2 groups.Results: Of the patients 32 (64%) were stone-free and 18 (36%) had residual stones. Mean values +/-SEM for the stone-free and residual stone groups were significantly different (551.20 +/- 46.66 versus 926.20 +/- 51.42 HU, p < 0.0001). A total of 30 calculi (60%) were located in the ureter, including 21 in the stone-free group and 9 in the residual stone group with a mean value of 505.10 +/- 46.66 and 888.70 +/- 102.00 HU, respectively, which was significantly different (p = 0.0005). A total of 20 calculi (40%) were located in the kidney, including 11 in the stone-free group and 9 in the residual stone group with a mean value of 558.40 +/- 62.38 and 905.10 +/- 61.49 HU, respectively, which was significantly different (p = 0.001).Conclusions: These findings suggest that HU measurement of urinary calculi on pretreatment noncontrast computerized tomography may predict the stone-free rate. This information may be beneficial for selecting the preferred treatment option for patients with urinary calculi.