Radiology:双能量CT碘浓度评价胰十二指肠切除术后胰瘘

2022-08-15 shaosai MedSci原创

双能量CT(DECT)是CT领域的一个进步,有利于绝对碘定量和基于多物质分解算法的脂肪分数分析。

众所周知术后胰腺瘘(POPF)是胰腺十二指肠切除术后最常见且可能危及生命的并发症。对POPF进行准确的风险预测和分层可提示外科医生有选择地使用预防措施以减少并发症的发生。瘘管风险评分在估计POPF发展方面起着核心作用,该评分将公认的变量,包括诊断或病理结果、胰腺导管大小、胰腺纹理和估计失血量,纳入一个临床相关的评分系统。然而,这个评分是一个术中风险指标,取决于外科医生的主观估计。因此,需要建立一个准确易于使用的术前识别方法以进行POPF高风险患者的识别

术前成像的几个形态特征已被多项研究证明与POPF有关,包括胰腺厚度、残余体积和主胰管直径。据报道,胰腺脂肪变性和无纤维化会软化腺体,因此与发展POPF的高风险有关。因此,临床花了很多精力试图用术前的MRI来预测POPF的风险,方法包括扩散加权成像评估体内不相干运动的灌注分数、T1加权MRI评估信号强度比、MR弹性成像和磁化转移成像评估胰腺硬度。然而,MR弹性成像昂贵且成像复杂,而磁化转移成像并不是一种广泛可用的术前评估。虽然us弹性成像十分方便,但缺乏可重复性是主要缺点。

双能量CT(DECT)是CT领域的一个进步,有利于绝对碘定量和基于多物质分解算法的脂肪分数分析。目前,DECT研究的一个重要领域是评估碘和脂肪值。据我们所知,使用DECT来估计POPF风险在文献中还没有得到很好的证实。

近日,发表Radiology杂志的一项研究评估了术前DECT对碘浓度(IC)和脂肪部分的量化以实现POPF的预测,并进一步评估了潜在的组织病理学变化。

项回顾性研究纳入了2020年1月-2020年12月期间接受胰十二指肠切除术和DECT(包括胰腺实质、门静脉和延迟相扫描)的患者。使用逻辑回归分析法分析了DECT得出的定量IC和脂肪分数以及增强图像的CT衰减值与POPF风险的关系。IC的预测性能与CT值的预测性能进行了比较。用多变量线性回归分析评估了IC的组织病理学基础。

共有107名患者(中位年龄,65岁;四分位数范围,57-70岁;56名男性)被纳入研究。其中,23人(21%)患有POPF。胰腺实质与门静脉期IC比值(调整后的几率比[OR],13;95%CI:2,162;P < .001)是POPF发生的独立预测因素。胰腺实质-门静脉期IC比值预测POPF的准确性高于相同阶段的CT值比值(78% vs 65%,P < .001)。胰腺实质-门静脉期IC比值与胰腺纤维化独立相关(β=-1.04;95%CI:-0.44,-1.64;P=.001)。


图 盒须图显示胰腺实质期与门静脉期的碘浓度比值(P/V IC比值)与纤维化显著相关(r = -0.529,P , .001)。框内表示上下四分位数,框内横线表示中位数,晶须表示范围

本研究表明,使用双能量CT(DECT)测定的术前定量碘浓度可作为胰十二指肠切除术患者术后胰瘘(POPF)的客观术前影像标志。本研究结果对外科医生在识别手术前POPF的高风险患者,从而改善个人围手术期护理和术中决策起到了重要的指导作用。

 

原文出处:

Hong-Yuan Shi,Zi-Peng Lu,Ming-Na Li,et al.Dual-Energy CT Iodine Concentration to Evaluate Postoperative Pancreatic Fistula after Pancreatoduodenectomy.DOI:10.1148/radiol.212173

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    2022-08-17 huagfeg
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    2022-08-17 膀胱癌
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本研究旨在评价传统磁共振(MR)成像参数和MR弹性成像与胰腺组织学特征和术后胰瘘(POPF)的相关性,并将结果发表在Radiology上。

Ann Surg:圆韧带覆盖远端胰腺切除术的切缘,对术后胰瘘发生率的影响

本研究的目的是分析圆韧带覆盖切缘对远端胰腺切除术(DP)后胰瘘发生率的影响。术后胰瘘(POPF)是DP术后最重要的并发症。回顾性研究显示,圆韧带修补覆盖切缘可能有益。这项前瞻性随机对照研究(DISCOVER试验)共纳入152例患者,在2010年10月至2014年7月接受DP。根据有或无圆韧带修补覆盖切缘,分为试验组(n = 76)和对照组(n = 76)。主要终点是POPF发生率,次要终点包括术后

Pancreatology:术中胰液淀粉酶水平可作为胰十二指肠切除术后胰瘘的简单预测指标

胰十二指肠切除术(PD)后,胰腺的残留的软组织通常被认为是术后胰瘘(POPF)发生的危险因素。但是,其评估是偏主观的。因此,本项研究的目的是评估术中胰液淀粉酶