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中华妇幼临床医学杂志(电子版) ›› 2019, Vol. 15 ›› Issue (03) : 275 -282. doi: 10.3877/cma.j.issn.1673-5250.2019.03.007

所属专题: 文献

论著

MRI对胎儿先天性膈疝的诊断价值
宋燕1, 谢淋旭1, 宁刚1,(), 孙艳1   
  1. 1. 四川大学华西第二医院放射科、出生缺陷与相关妇儿疾病教育部重点实验室,成都 610041
  • 收稿日期:2019-01-17 修回日期:2019-04-29 出版日期:2019-06-01
  • 通信作者: 宁刚

Diagnostic value of MRI in fetal congenital diaphragmatic hernia

Yan Song1, Linxu Xie1, Gang Ning1,(), Yan Sun1   

  1. 1. Department of Radiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
  • Received:2019-01-17 Revised:2019-04-29 Published:2019-06-01
  • Corresponding author: Gang Ning
  • About author:
    Corresponding author: Ning Gang, Email:
  • Supported by:
    National Key Research and Development Project(2017YFC0109004, 2018YFC1002202, 2017YFC0113905)
引用本文:

宋燕, 谢淋旭, 宁刚, 孙艳. MRI对胎儿先天性膈疝的诊断价值[J]. 中华妇幼临床医学杂志(电子版), 2019, 15(03): 275-282.

Yan Song, Linxu Xie, Gang Ning, Yan Sun. Diagnostic value of MRI in fetal congenital diaphragmatic hernia[J]. Chinese Journal of Obstetrics & Gynecology and Pediatrics(Electronic Edition), 2019, 15(03): 275-282.

目的

探讨MRI在胎儿先天性膈疝(CDH)诊断及预后评估中的应用价值。

方法

选择2014年12月至2018年3月,于四川大学华西第二医院进行胎儿MRI检查后,被诊断为CDH的15例胎儿为研究对象,纳入病例组。选取同期于本院进行MRI检查,排除其他疾病,并且与病例组胎儿胎龄相匹配的15例正常胎儿作为对照,纳入对照组。比较2组胎儿MRI检查项目,如左肺体积(LLV)、右肺体积(RLV)及肺总体积(TLV),并且观察病例组胎儿疝口位置、疝内容物、有无肝脏疝入及其疝入体积。对病例组胎儿进行随访,记录其出生后手术治疗及预后情况。计算每例CDH胎儿的实测肺总体积与预期肺总体积比值[TLV(o/e)]。2组胎儿LLV、RLV及TLV比较,采用Mann-Whitney U检验。本研究遵循的程序符合四川大学华西第二医院人体试验委员会制定的标准,经过该伦理委员会批准(批准文号:2014伦理审批第41号)。病例组与对照组胎儿母亲年龄、接受MRI检查时的胎龄分别比较,差异均无统计学意义(P>0.05)。

结果

① 2组胎儿LLV、RLV及TLV比较:病例组胎儿LLV、RLV及TLV分别为1.1 cm3(0.6~4.3 cm3)、15.0 cm3(9.5~24.3 cm3)、16.5 cm3(10.6~28.6 cm3),均显著小于对照组胎儿的21.7 cm3(11.7~32.8 cm3)、29.1 cm3(11.7~32.8 cm3)、58.6 cm3(30.4~86.0 cm3),2组分别比较,差异均有统计学意义(Z=7.521、6.536、22.734,P<0.001)。②病例组15例CDH胎儿的MRI影像学表现为:左侧膈肌存在不同程度缺损,腹腔脏器(肝、脾、肾、胃、小肠、直肠等)通过缺损膈肌疝入胸腔,左肺受压,纵隔右移,部分胎儿右肺受压。其中,6例伴有肝脏疝入,5例伴有脾疝入,1例伴有左肾疝入。6例伴有肝脏疝入的CDH胎儿中,1例存活,肝脏疝入体积为5.1 cm3;2例引产终止妊娠,肝脏疝入体积分别为15.1、14.1 cm3;3例出生后死亡,肝脏疝入体积分别为9.0、15.2、47.1 cm3。③病例组胎儿结局:15例CDH胎儿中,5例引产终止妊娠,其TLV(o/e)为0.17~0.33;剖宫产术分娩者为10例,其中新生儿存活为6例,其TLV(o/e)为0.18~0.55,出生后死亡为4例,其TLV(o/e)为0.17~0.27。④经剖宫产术分娩的10例胎儿中,8例于生后接受外科手术治疗,6例为开腹手术,2例为胸腔镜手术,术中可见疝口位置,均与MRI诊断一致,而术中所见疝内容物,则与MRI诊断不完全一致。

结论

MRI检查可明确CDH胎儿的疝口位置及疝内容物,测量胎肺及肝脏疝入体积,对胎儿健侧肺发育不良及预后评估具有重要价值。

Objective

To study the application value of MRI in diagnosis and prognosis evaluation of fetal congenital diaphragmatic hernia (CDH).

Methods

A total of 15 cases of fetuses from December 2014 to March 2018 who received fetal MRI and were diagnosed as fetal CDH in West China Second University Hospital, Sichuan University were selected research subjects and enrolled into case group. Meanwhile another 15 cases of normal fetuses who received fetal MRI during the same period in the same hospital and whose gestational age were matched with case group were selected as control group. By MRI left lung volume (LLV), right lung volume (RLV) and total lung volume (TLV) of the two groups were measured, and the position of the fetal hernia, hernia contents, liver hernia and hernia volume of the case group were observed. The postnatal surgery and prognosis of fetuses in case group were recorded. Observed-to-expected total lung volume [TLV(o/e)] was calculated for each CDH fetus. Mann-Whitney U test was used to compare LLV, RLV and TLV between two groups. The procedures followed in this study were in line with the standards set by the Human Trials Committee of West China Second University Hospital, Sichuan University, and were approved by the ethics committee [Approval No. 2014(41)]. The maternal age and gestational age of fetuses in case group and control group were compared respectively, and the differences were not statistically significant (P>0.05).

Results

①The LLV, RLV and TLV of fetuses in case group were 1.1 cm3 (0.6-4.3 cm3), 15.0 cm3 (9.5-24.3 cm3), and 16.5 cm3 (10.6-28.6 cm3), respectively, which were significantly smaller than those of 21.7 cm3 (11.7-32.8 cm3), 29.1 cm3 (11.7-32.8 cm3), and 58.6 cm3 (30.4-86.0 cm3) in control group, and all the differences between two groups were statistically significant (Z=7.521, 6.536, 22.734; P<0.001). ②MRI showed that there were different degrees of defects in the left diaphragm of all CDH fetuses in case group, abdominal organs hernia (liver, spleen, kidney, stomach, small intestine, rectum, etc.), and their left lungs were compressed, their mediastinum shifted right, and some fetuses with right lung under compression. Among them, six cases were with hepatic hernia, five cases with splenic hernia, and 1 case with left renal hernia. Among six cases of CDH fetuses with hepatic hernia, one case survived with a hepatic hernia volume of 5.1 cm3; two cases were induced for termination of pregnancy with liver hernia volumes of 15.1 cm3 and 14.1 cm3, respectively; three cases died after birth with liver hernia volumes of 9.0 cm3, 15.2 cm3 and 47.1 cm3, respectively. ③Among the 15 CDH fetuses in case group, five fetuses were induced for termination of pregnancy with TLV(o/e) of 0.17-0.33, and ten cases were delivered by cesarean section, six cases of which were survived with TLV(o/e) of 0.18-0.55, and four cases of which died after birth with TLV(o/e) of 0.17-0.27. ④Among the ten fetuses delivered by cesarean section, eight cases received surgical treatment after birth, six cases received laparotomy, and two cases received thoracoscopic surgery. The location of orificium hernialis found during surgery was consistent with MRI diagnosis, while the intraoperative hernia contents were not completely consistent with MRI diagnosis.

Conclusions

MRI examination can determine the position of orificium hernialis and hernia contents of CDH fetus, and measure the volumes of fetal lung and liver hernia, also it is of great value for the evaluation of uninjured side pulmonary dysplasia and prognosis of CDH fetus.

表1 病例组与对照组胎儿肺体积比较[cm3M(P25P75)]
图1 先天性膈疝胎儿产前MRI影像学表现[图1A:T2WI序列肝脏呈稍低信号(白色箭头所示);图1B:T2WI序列胃泡呈明显高信号(黑色箭头所示);图1C:T2WI序列脾脏呈低信号(红色箭头所示),小肠呈高信号(黄色箭头所示),结肠呈低信号(白色箭头所示);图1D:T1WI序列结肠呈高信号(白色箭头所示)]
图2 先天性膈疝患儿产前、出生后及治疗后MRI影像学表现(图2A:胎龄为30+1周时,产前MRI检查结果显示,胎儿左侧膈疝,胃泡、大部分小肠及部分结肠疝入胸腔;图2B:出生后胸、腹部X射线摄片检查结果显示,直肠、结肠内高密度影,肠管及胃泡疝入胸腔,双肺野显示不清,纵隔右移;图2C:经治疗后,胸、腹部X射线摄片检查结果显示,肠管、胃泡等腹腔脏器复位,左肺复张良好,纵隔居中)
表2 15例先天性膈疝胎儿MRI检查、手术治疗及结局分析
胎儿(No.) 诊断胎龄(周) 剖宫产术分娩/引产终止妊娠胎龄(周) MRI检查所见疝内容物 术中所见疝内容物 手术治疗方式 TLV(o/e) 肝脏疝入体积(cm3) 结局
1 30+1 38+2 胃泡、大部分小肠及部分结肠 全部小肠、部分结肠及脾 开腹手术 0.35 0 存活
2 36 38 胃泡、小肠及大部分结肠 肝左叶、脾、胃、横结肠及部分小肠 开腹手术 0.31 0 存活
3 38+5 38+5 胃泡、大部分小肠及结肠 胃、小肠及肝左叶 胸腔镜手术 0.22 0 存活
4 29+4 35+5 胃泡、脾、肝左外侧段与部分小肠及结肠 部分肝左叶、脾、胃及小肠 胸腔镜手术 0.55 5.1 存活
5 38 38+6 小肠及升结肠 脾、副脾、大部分小肠、横结肠、乙状结肠及大网膜等,伴肠旋转不良 开腹手术 0.28 0 存活
6 37+3 38+2 胃泡、脾、全部小肠与大部分结肠及部分左肾 脾、全部小肠、部分结肠、右侧肾上腺及部分肾 开腹手术 0.18 0 存活
7 30+5 34+3 胃泡、大部分小肠及部分结肠 肝左叶、脾、胃、小肠、大部分结肠 开腹手术 0.22 0 死亡
8 30+4 37 胃泡、肝左叶、脾、大部分小肠及部分结肠,伴胃扭转 外院手术,左侧膈肌完全缺如,疝内容物不清楚 开腹手术 0.27 47.1 死亡
9 27+1 40+4 胃泡、脾、肝左叶外侧段与大部分小肠及结肠,伴胃扭转 0.17 9.0 死亡
10 33+3 40+2 胃泡、小肠与大部分结肠、肝左叶 0.17 15.2 死亡
11 30+6 32+5 胃泡、小肠及大部分结肠 0.33 0 引产
12 24+3 24 胃泡、大部分小肠及结肠 0.32 0 引产
13 26+2 27+2 胃泡、脾、肝左叶与大部分小肠及结肠,伴胃扭转 0.17 15.1 引产
14 26+1 27 胃泡、小肠与大部分结肠及肝左叶 0.32 14.1 引产
15 26+4 27+3 左侧膈肌消失,胃泡、小肠及部分结肠 0.24 0 引产
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