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Radiology:这一前列腺MRI测量值,可实现对前列腺切除术后尿失禁的无创预测!

2022-03-10 shaosai MedSci原创

根治性前列腺切除术(RP)后的尿失禁是决定患者生活质量的一个重要因素。在一项荟萃分析中,RP术后1年的尿失禁发生率为4%至31%。

根治性前列腺切除术(RP)后的尿失禁是决定患者生活质量的一个重要因素。在一项荟萃分析中,RP术后1年的尿失禁发生率为4%至31%。有关前列腺癌预后研究发现,只有35%的男性在RP后12个月内能完全控制尿液。在做出治疗建议或决定时,预测RP后尿失禁的发生率为进一步的治疗规划提供重要信息

在许多研究中部分临床特征被用来预测RP后尿失禁的恢复情况,包括年轻、较低的体重指数和较低的临床肿瘤分期。术前MRI的一些影像征象也与尿失禁的恢复有关,包括较小的前列腺体积、较长的尿道膜部(MUL)、提肛肌与尿道膜部之间的距离以及尿道膜部与前列腺轴的角度(aMUP)

现阶段尿道膜部被认为是造成RP后尿失禁的主要因素。在进行手术解剖时,括约肌及其神经可能被损坏,因此导致括约肌无力和尿失禁。然而这方面的研究并不完善需要对MUL与临床参数和其他潜在的基于MRI解剖学的尿失禁预测措施进行全面评估,以确定MUL在常规临床护理中的作用。

近日,发表在Radiology杂志的一项研究评估了将基于MRI的预测尿失禁的解剖学征象(冠状线MUL、内侧切除距离、外侧切除距离、aMUP、耻骨尿道角、前列腺体积)纳入多变量分析的临床模型,确定解剖学测量的测量者间的一致性,为术前个性化评估尿失禁的发生率提供了技术参考依据

项回顾性队列研究中,对2015年8月-2019年10月期间接受RP的男性进行了排尿结果评估。术前基于MRI的解剖学测量由四位腹部放射科医生回顾性测量得出建立了单独的临床变量、单独的MRI变量和综合变量的Logistic回归模型预测RP后3个月、6个月和12个月的尿失禁情况。使用类内相关系数(ICCs)来评估MRI变量的相互间一致性。

共有586名男性被纳入研究(平均年龄±标准差:63岁±7)。基线时尿失禁患者的比例为0.2%(589人中有1人),3个月时为27%(529人中有145人),6个月时为14%(465人中有63人),12个月时为9%(425人中有37人)。在纳入临床和MRI预测因素的模型中,较长的MUL所有时间点的尿失禁几率均较高(每1毫米的几率比:0.86 [95% CI: 0.80, 0.93], P < .001; 0.86 [95% CI: 0.78, 0.95], P = .003; 和 0.79 [95% CI: 0.67, 0.91], P = .002)。其他MRI变量均不具有预测性。年龄和基线尿液功能评分是每个时间点上唯一的其他预测性临床变量。在接受过专门的前列腺MRI测量培训的读者中,MUL的校对一致性中等(ICC,0.62),而在没有接受过培训的读者中,校对一致性较差(ICC,0.38)。

 矢状(A)和冠状(B,C)T2 MRI图像显示尿道膜部长度(MUL)测量。MUL被定义为从前列腺顶端到尿道进入阴茎球部的距离。A和B中的黄线代表MUL。

 

总之,研究结果支持使用冠状位尿道膜部长度(MUL)与临床变量相结合来预测根治性前列腺切除术后的尿失禁发生率本研究数据指出对放射科医生进行MUL测量的专门培训可显著提高测量者之间的一致性。

 

原文出处

Hannah Lamberg,Prasad R Shankar,Karandeep Singh,et al.Preoperative Prostate MRI Predictors of Urinary Continence Following Radical Prostatectomy.DOI:10.1148/radiol.210500.

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    2022-05-30 疏通下水道

    MUL在所有时间点的尿失禁几率均较高??

    0

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