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Lancet:宫内磁共振成像在胎儿脑畸形诊断中的应用

2016-12-15 xing.T MedSci原创

iuMRI可以提高胎儿脑部异常诊断的准确性和可信度,导致大部分病例临床管理发生变化。这一发现,连同患者的可接受程度,导致研究者认为经超声检查发现的疑似脑异常胎儿应该进行iuMRI检查以更好地告知咨询和管理决策。

宫内MRI(iuMRI)有望作为一种辅助超声的诊断手段,但对诊断性能尚未较好的进行界定。近日,顶级医学期刊Lancet上发表了一篇研究文章,旨在评估运用iuMRI能否提高大脑发育异常胎儿产前诊断的诊断准确性和可信度,以及评估iuMRI的临床影响和患者接受情况。

研究人员在英国16个胎儿医学中心进行了一项多中心、前瞻性队列研究。年龄超过16岁,并在孕周18周后经超声检查发现胎儿脑部异常,没有iuMRI禁忌的孕妇被纳入研究。经超声检查怀疑有脑异常胎儿的孕妇在超声检查后14天内完成iuMRI检查。结果由两个独立的专家小组进行审查,并用来估计诊断的准确性和可信度,以及与诊断结果进行比较。另外评估了iuMRI所带来的诊断、预后和临床管理方面的变化和患者的接受程度。

在2011年7月29日和2014年8月31日期间参与者被招募入该研究,该队列被细分为孕周大于18周但小于24周的胎儿组(n=369),和孕周大于24周胎儿组(n=201)。在孕周大于18周但小于24周的胎儿组诊断的准确率提高了23%(95%可信区间为18-27),在孕周大于24周胎儿组为29%(23-36)(两组均有P<0.0001)。总的诊断准确率超声检查为68%,iuMRI检查为93%(差异为25%,95%可信区间为21-29)。主要诊断报告高可信度在超声检查为465/570例(82%),在iuMRI检查为544/570例(95%)。iuMRI为387/783例(49%)患者提供了更多的诊断信息,改变了至少157例(20%)患者的预后信息,并导致超过1/3的患者临床管理的变化。iuMRI也有较高的患者接受程度,至少95%的女性说如果将来妊娠并发胎儿脑部异常时,他们愿意进行iuMRI检查。

由此可见,iuMRI可以提高胎儿脑部异常诊断的准确性和可信度,导致大部分病例临床管理发生变化。这一发现,连同患者的可接受程度,导致研究者认为经超声检查发现的疑似脑异常胎儿应该进行iuMRI检查以更好地告知咨询和管理决策。

原始出处:

Paul D Griffiths,et al. Use of MRI in the diagnosis of fetal brain abnormalities in utero (MERIDIAN): a multicentre, prospective cohort study. Lancet. 14 December 2016.

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    2017-10-06 howi
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    2016-12-16 wushaoling
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