malformation

畸形
  • 文章类型: Journal Article
    盐酸头孢卡戊酯是孕妇或可能怀孕的妇女经常使用的抗生素。然而,在怀孕的头三个月接触它的安全性尚未评估。在这项研究中,我们旨在阐明妊娠早期暴露对母婴结局的影响.数据来自1988年4月至2017年12月在两家日本机构接受怀孕期间药物使用咨询的孕妇。比较了在妊娠早期服用盐酸头孢布酯(n=270)和对照药物(n=1594)的妇女出生的新生儿在单胎妊娠中主要畸形的发生率。主要畸形发生率的调整比值比使用多变量logistic回归分析计算为在怀孕和母亲年龄期间吸烟。盐酸头孢布酯组的主要畸形发生率为2.6%,对照组为1.8%。盐酸头孢布酯与对照组的发生率无显著差异(调整比值比:1.48[95%置信区间:0.64-3.42],p=0.36)。这项前瞻性队列研究表明,在怀孕的头三个月中暴露于盐酸头孢戊酯与婴儿发生重大畸形的风险增加无关。我们的发现将帮助医疗保健提供者选择合适的药物。
    Cefcapene pivoxil hydrochloride is an antibiotic often used by women who are or may be pregnant. However, the safety of exposure to it during the first trimester of pregnancy has not been assessed. In this study, we aimed to clarify the effects of exposure during the first trimester of pregnancy on maternal and fetal outcomes. Data were obtained from pregnant women who were counseled on drug use during pregnancy at two Japanese facilities from April 1988 to December 2017. The incidence of major malformations in singleton pregnancy was compared between neonates born to women who took cefcapene pivoxil hydrochloride (n = 270) and control drugs (n = 1594) during their first trimester. The adjusted odds ratio of the incidence of major malformations was calculated using multivariate logistic regression analysis adjusted for smoking during pregnancy and maternal age. The incidence of major malformations was 2.6% in the cefcapene pivoxil hydrochloride group and 1.8% in the control group. There were no significant differences in the incidence between the cefcapene pivoxil hydrochloride and control groups (adjusted odds ratio: 1.48 [95% confidence interval: 0.64-3.42], p = 0.36). This prospective cohort study showed that exposure to cefcapene pivoxil hydrochloride during the first trimester of pregnancy was not associated with increased risk of major malformations in infants. Our findings will help healthcare providers in choosing appropriate medicines.
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  • 文章类型: Journal Article
    目的:膈内肺外隔离(EPS)(ID-EPS)很少见,需要额外的手术,例如切开或将膈肌从病变处脱离以进行诊断。本研究旨在描述影像学发现并评估超声和计算机断层扫描(CT)对ID-EPS的诊断准确性。
    方法:隔膜标志,病变边缘的形状,在超声和CT上将静脉引流到腹腔内,使用Fisher精确检验比较ID-EPS和膈上EPS(AD-EPS)患者的超声病变特征。
    结果:3和9例患者被诊断为ID-EPS和AD-EPS,分别。在超声检查下,两组之间的隔膜征(ID-EPS与AD-EPS患者的存在/不存在,2/1对0/9,P=.046),超声/CT上病变边缘的形状(ID-EPS与AD-EPS患者的圆形/喙,3/0vs0/9,CT和超声均为P=.005),超声的病变特征(ID-EPS与AD-EPS患者的病变内存在/不存在囊性区域,0/3vs7/2,P=.046),CT显示引流静脉进入腹部(ID-EPSvsAD-EPS患者存在/不存在;2/1vs0/9,P=0.046)。在超声检查中,腹部未显示引流静脉,两组之间在CT上的分裂图征象的存在/不存在(ID-EPSvsAD-EPS和ID-EPS患者的存在/不存在;0/3vs0/9,P>.999;1/2vs0/9,P=.250)没有显着差异。
    结论:产后超声检查和CT检查的结合可用于预测隔膜内的EPS。
    OBJECTIVE: Extrapulmonary sequestration (EPS) within the diaphragm (ID-EPS) is rare and requires additional procedures such as incision or detachment of the diaphragm from the lesion for diagnosis. This study aimed to describe the imaging findings and evaluate the diagnostic accuracy of ultrasonography and computed tomography (CT) for ID-EPS.
    METHODS: Split diaphragm sign, shape of lesion edge, drainage vein into intra-abdomen on ultrasound and CT, and lesion characteristics on ultrasound were compared between patients with ID-EPS and with above-diaphragm EPS (AD-EPS) using Fisher\'s exact test.
    RESULTS: Three and nine patients were diagnosed with ID-EPS and AD-EPS, respectively. Significant differences were observed between the two groups in the split diaphragm sign on ultrasound (presence/absence in patients with ID-EPS vs AD-EPS, 2/1 vs 0/9, P = .046), shape of lesion edge on ultrasound/CT (round/beak in patients with ID-EPS vs AD-EPS, 3/0 vs 0/9, P = .005 on both CT and ultrasound), lesion characteristics on ultrasound (presence/absence of cystic area within lesion in patients with ID-EPS vs AD-EPS, 0/3 vs 7/2, P = .046), and the drainage vein into the abdomen on CT (presence/absence in patients with ID-EPS vs AD-EPS; 2/1 vs 0/9, P = .046). No drainage veins were visualized in the abdomen on ultrasonography and no significant differences in the presence/absence of the split-diagram sign on CT (presence/absence in patients with ID-EPS vs AD-EPS and ID-EPS; 0/3 vs 0/9, P > .999; 1/2 vs 0/9, P = .250) were observed between the two groups.
    CONCLUSIONS: A combination of postnatal ultrasonography and CT was useful in predicting EPS located within the diaphragm.
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  • 文章类型: Journal Article
    内质网(ER)是蛋白质的最大膜状网络,脂质和类固醇合成,运输和储存。关于ER-cisternae的详细信息,人血细胞中的ER小管和粗面内质网(rER)很少。这项研究描述了六名急性早幼粒细胞白血病(APL)患者的成髓细胞中的一系列巨大内含物和Auer体,通过光学显微镜,透射电子显微镜(TEM)和细胞化学染色。TEM显示,巨大的包裹体和前奥尔体与rER相关,并被成纤维细胞中退化或冗余膜组成的管状结构包围,与ER系统的元素相对应。本文揭示了在APL的成髓细胞中,ER是巨大的夹杂物和奥尔体的来源,并逐渐转化为巨大的夹杂物和奥尔体。
    The endoplasmic reticulum(ER)is the largest membranous network serving as a region for protein, lipid and steroid synthesis, transport and storage. Detailed information about ER-cisternae, ER-tubules and rough endoplasmic reticulum (rER) is scarce in human blood cells. This study describes a series of giant inclusions and Auer bodies in promyeloblasts in six patients with acute promyelocytic leukemia (APL), by light microscopy, transmission electron microscopy (TEM) and cytochemical stains. TEM revealed that giant inclusions and pro-Auer bodies were associated with rER and surrounded by tubular structures composed of degenerated or redundant membrane in promyeloblasts, which corresponded with elements of the ER system. This paper reveals that in the promyeloblasts of APL, ER is the source of and transforms progressively into giant inclusions and Auer bodies.
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  • 文章类型: Journal Article
    背景发育毒性试验非常昂贵,需要大量的动物,而且很耗时。有必要开发一种新方法来简化对发展终点的分析。这些终点之一是畸形,一组正在进行的简化方法是计算机模型。在这项研究中,我们的目标是开发一个定量结构-活动关系(QSAR)模型,并确定预测畸形的最佳算法,以及与畸形相关的最重要和最有效的物理化学性质。方法数据集是从一个名为COMPTOX的可靠数据库中提取的。使用Mordred和RDKit化学信息学软件计算物理化学性质(描述符)。数据被清理了,预处理,然后拆分为训练集和测试集。机器学习算法,如梯度提升(GBM)和逻辑回归(LR),以及深度学习模型,包括用训练集数据和不同描述符集训练的多层感知器(MLP)和神经网络(NN)。然后用测试集和各种统计参数对模型进行了验证,如马修的相关系数(MCC)和平衡精度得分,结果一组包含78%AUC的描述符被确定为最佳描述符组。梯度提升被确定为具有78%预测能力的最佳算法。结论对于开发模型最有效的描述符直接影响畸形的机制,由于其马修斯相关系数(MCC)和平衡精度(BAC),梯度提升是最好的模型。
    UNASSIGNED: Developmental toxicity tests are extremely expensive, require a large number of animals, and are time-consuming. It is necessary to develop a new approach to simplify the analysis of developmental endpoints. One of these endpoints is malformation, and one group of ongoing methods for simplifying is in silico models. In this study, we aim to develop a quantitative structure-activity relationship (QSAR) model and identify the best algorithm for predicting malformations, as well as the most important and effective physicochemical properties associated with malformation.
    UNASSIGNED: The dataset was extracted from a reliable database called COMPTOX. Physicochemical properties (descriptors) were calculated using Mordred and RDKit chemoinformatics software. The data were cleaned, preprocessed, and then split into training and testing sets. Machine learning algorithms, such as gradient boosting model (GBM) and logistic regression (LR), as well as deep learning models, including multilayer perceptron (MLP) and neural networks (NNs) trained with train set data and different sets of descriptors. The models were then validated with test set and various statistical parameters, such as Matthew\'s correlation coefficient (MCC) and balanced accuracy (BAC) score, were used to compare the models.
    UNASSIGNED: A set of descriptors containing with 78% AUC was identified as the best set of descriptors. Gradient boosting was determined to be the best algorithm with 78% predictive power.
    UNASSIGNED: The descriptors that were the most effective for developing models directly impact the mechanism of malformation, and GBM is the best model due to its MCC and BAC.
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  • 文章类型: Journal Article
    背景:颅骨融合是芬兰普遍存在的颅面畸形;然而,全面的基于人群的流行病学数据是有限的。这项研究旨在估计1987年至2010年芬兰颅骨融合的总患病率和出生患病率,并检查时间趋势。
    方法:我们从芬兰卫生与福利和统计研究所维护的全国登记册中收集数据,以及治疗医院,包括活产,死产,终止胎儿畸形,以及怀疑或诊断为颅骨融合症或颅骨变形的婴儿死亡。颅面外科医生和临床遗传学家审查了1878年的医疗记录以进行诊断确认。
    结果:在877例颅骨融合中,83%是单缝骨结膜(所有活产),10%的颅骨融合综合征,和7%的多缝线非综合征性滑膜。1987年至2010年的活产患病率为6.0/10000活产,从1987年的5.0/10,000到2010年的7.5/10,000。总患病率,包括活产,死产,和终止,从1987年的5.0/10,000变化到2010年的8.0/10,000。矢状融合是最常见的融合,活产的患病率为3.9/10,其次是metopic(0.6/10000),单声道(0.4/10,000),和unilambdoid(0.1/10,000)节。
    结论:由于所有亚组的无显著性升高和综合征组的显著升高,所有颅骨融合类型的总合并患病率显著升高。在活产中,仅在综合征亚组中增加显着,主要是由于Muenke综合征患者的增加。综合征患病率的上升需要进一步调查。与欧洲的趋势相反,澳大利亚,和美国,芬兰的异位颅骨融合没有显着增加。
    BACKGROUND: Craniosynostosis is a prevalent craniofacial malformation in Finland; however, comprehensive population-based epidemiological data are limited. This study aimed to estimate the total and birth prevalence of craniosynostosis in Finland from 1987 to 2010 and examine temporal trends.
    METHODS: We collected the data from nationwide registers maintained by the Finnish Institute for Health and Welfare and Statistics Finland, as well as treating hospitals, encompassing live births, stillbirths, terminations for fetal anomalies, and infant deaths with suspected or diagnosed craniosynostosis or skull deformation. A craniofacial surgeon and a clinical geneticist reviewed 1878 medical records for diagnostic confirmation.
    RESULTS: Out of 877 craniosynostosis cases, 83% were single-suture synostoses (all live births), 10% craniosynostosis syndromes, and 7% multisutural non-syndromic synostoses. Live birth prevalence from 1987 to 2010 was 6.0/10,000 live births, ranging from 5.0/10,000 in 1987 to 7.5/10,000 in 2010. Total prevalence, including live births, stillbirths, and terminations, varied from 5.0/10,000 in 1987 to 8.0/10,000 in 2010. Sagittal synostosis was the most common synostosis, with a prevalence of 3.9/10,000 live births, followed by metopic (0.6/10,000), unicoronal (0.4/10,000), and unilambdoid (0.1/10,000) synostoses.
    CONCLUSIONS: The total combined prevalence of all craniosynostosis types significantly increased driven by a nonsignificant rise across all subgroups and a significant increase in the syndrome group. In live births increase was significant only within the syndrome subgroup, primarily due to an increase in Muenke syndrome patients. The rising prevalence of syndromes necessitates further investigation. Contrasting with trends in Europe, Australia, and the USA, Finland showed no significant increase in metopic craniosynostosis.
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  • 文章类型: Journal Article
    目的:先天性巨畸形(CMP)是一种罕见的阴茎畸形,通常需要手术矫正。进行这项研究是为了检查改良的Sugita程序在小儿患者中修复CMP的功效。
    方法:回顾性分析2019年1月至2021年4月在我院接受外科医师采用改良Sugita手术治疗的CMP患儿的临床资料。
    结果:纳入20例患者,他们手术时的中位年龄为70.5个月(范围,60-96个月)。所有手术都很成功,术中无并发症发生。5例患者术后包皮中度水肿,10%高渗盐水浸泡导致水肿在4至8周内消失。随访时间为6至20个月(中位数,10个月)。无其他并发症发生,如裂开或血肿。
    结论:改良的Sugita方法校正CMP可产生出色的外观和较低的并发症发生率。我们的研究表明,改良的Sugita手术是一种安全可行的治疗选择。
    OBJECTIVE: Congenital megaprepuce (CMP) is a rare penile deformity that usually requires surgical correction. This study was performed to examine the efficacy of the modified Sugita procedure for repairing CMP in pediatric patients.
    METHODS: We retrospectively analyzed the clinical data of pediatric patients with CMP treated by a surgeon using the modified Sugita procedure in our hospital from January 2019 to April 2021.
    RESULTS: Twenty patients were enrolled, and their median age at surgery was 70.5 months (range, 60-96 months). All surgeries were successful, and no complications occurred during the operation. The postoperative foreskin had moderate edema in five patients, and soaking in 10% hypertonic saline resulted in disappearance of the edema within 4 to 8 weeks. The follow-up duration was 6 to 20 months (median, 10 months). No other complications occurred, such as dehiscence or hematoma.
    CONCLUSIONS: The modified Sugita procedure for correction of CMP produces excellent cosmesis and a low complication rate. Our study indicates that the modified Sugita procedure is a safe and feasible treatment option.
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  • 文章类型: Journal Article
    背景:原发性磨牙的根尖周感染影响恒牙(前磨牙)的发育。因此,本研究旨在检验4-10岁儿童原发性磨牙慢性根尖周炎(CAP)的原假设。
    方法:回顾性研究,对185例年龄在4-10岁的健康儿童的原始磨牙进行了横断面研究。共有256颗受感染的原发性磨牙(女性为144颗牙齿,分析了男性的112颗牙齿),射线照相,并与对侧245颗健康的初级磨牙进行比较。对永久继任者的卵泡损伤进行了评估,成熟,形态学,和喷发路径的偏差。对初级磨牙的根吸收进行了评估。由于发育异常,排除了患侧的16颗恒牙和对照侧的5颗恒牙。采用t检验和卡方检验对数据进行分析。
    结果:零假设被拒绝。受影响一侧永久继承人的发展状况存在显着差异,与正常一侧相比,在4到7年(p<0.05)。患侧永久继承者异常无显著性别差异(p>0.05)。随着初级磨牙的根吸收增加,在永久继承人中观察到的卵泡损伤也增加(p<0.05),这表明,随着原发性磨牙感染的增加,更多的损害是造成潜在的永久后继(前磨牙)。
    结论:原发性磨牙的根尖周炎阻碍了永久后继(前磨牙)的发育,影响他们的形状,导致卵泡损伤,并改变了喷发路径。
    BACKGROUND: Periapical infection of primary molars affects the development of permanent teeth (premolars). Therefore, the present study was conducted to test the null hypothesis in children aged 4-10 years with chronic apical periodontitis (CAP) of the primary molars.
    METHODS: A retrospective, cross-sectional study was conducted on 185 panoramic radiographs of healthy children aged 4-10 years with CAP in the primary molars. A total of 256 infected primary molars (144 teeth in females, 112 teeth in males) were analyzed, radiographically, and compared with 245 healthy primary molars on the contralateral side. Permanent successors were evaluated for follicular damage, maturation, morphology, and deviation in the eruption path. Primary molars were evaluated for root resorption. Sixteen permanent teeth on the affected side and five teeth on the control side were excluded due to abnormal development. Student\'s t-test and the chi-square test were used to analyze the data.
    RESULTS: The null hypothesis is rejected. There were significant differences in the developmental status of permanent successors on the affected side, compared to the normal side at four to seven years (p<0.05). There were no significant sex differences in the abnormalities of permanent successors on the affected side (p>0.05). As the root resorption of the primary molars increased, the follicular damage observed in the permanent successors also increased (p<0.05), which suggests that, as the infection of primary molars increases, more damage is caused to underlying permanent successors (premolars).
    CONCLUSIONS: Apical periodontitis of the primary molars retards the development of permanent successors (premolars), affects their shape, causes follicular damage, and alters the eruption path.
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  • 文章类型: Journal Article
    使用内皮素受体拮抗剂(ERAs)和利奥西瓜,批准用于治疗肺动脉高压(PH),由于报告的动物致畸性,在怀孕期间是禁忌的。我们的目的是调查这些药物在育龄妇女/女孩中的处方,并探讨暴露于这些药物的怀孕的发生作为次要目标。使用德国药物流行病学研究数据库(GePaRD,来自20%德国人口的索赔数据)我们进行了横断面分析,以确定2004年至2019年期间ERA和riociguat的处方患病率,并描述用户和处方模式。在队列分析中,我们在关键时间窗内评估了暴露于这些药物的妊娠发生情况.总的来说,我们在2004年至2019年间确定了407名服用波生坦≥1次的女性;abrisentan的人数分别为73,182用于Macitentan,31代表西塔克森坦,63分给里奥西加特。在几乎所有的岁月里,超过50%的女孩/妇女年龄≤40岁。2012年和2013年,波生坦的年龄标准化患病率最高(0.04/1,000),2018年和2019年其次是马西坦(0.03/1,000)。我们观察到10次暴露怀孕:波生坦5次,3给ambrisentan,和2到Macitentan。从2014年起,马西坦和利奥西加的患病率增加可能反映了PH治疗的变化。尽管PH是一种罕见的疾病,患有PH的女性应该避免怀孕,特别是如果他们使用电子逆向拍卖,我们确定了暴露于ERA的怀孕。需要进行多数据库研究来评估这些药物对未出生婴儿的风险。
    Use of endothelin receptor antagonists (ERAs) and riociguat, approved for treatment of pulmonary hypertension (PH), is contraindicated during pregnancy due to reported teratogenicity in animals. We aimed to investigate prescribing of these drugs in girls/women of childbearing age and to explore - as a secondary aim - the occurrence of pregnancies exposed to these drugs. Using the German Pharmacoepidemiological Research Database (GePaRD, claims data from 20% of the German population) we conducted cross-sectional analyses to determine prescribing prevalence of ERAs and riociguat between 2004 and 2019 and to characterize users and prescribing patterns. In a cohort analysis, we assessed the occurrence of pregnancies exposed to these drugs in the critical time window. Overall, we identified 407 women with ≥ 1 dispensation of bosentan between 2004 and 2019; the respective number was 73 for ambrisentan, 182 for macitentan, 31 for sitaxentan, and 63 for riociguat. In nearly all years, more than 50% of the girls/women were ≤ 40 years. Age-standardized prevalence was highest for bosentan (0.04/1000) in 2012 and 2013, followed by macitentan (0.03/1000) in 2018 and 2019. We observed 10 exposed pregnancies: 5 to bosentan, 3 to ambrisentan, and 2 to macitentan. The increased prevalence of macitentan and riociguat from 2014 onwards might reflect changes in PH treatment. Even though PH is a rare disease and pregnancy should be avoided in women with PH, particularly if they use ERAs, we identified pregnancies exposed to ERAs. Multi-database studies will be needed to assess the risk of these drugs on the unborn child.
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  • 文章类型: Journal Article
    背景:该研究旨在调查我们单中心8年的产前肾积水(HN)儿童出生后早期的临床特征。
    方法:回顾性分析我中心2012-2020年1137例HN患儿的临床资料。我们研究的变量主要包括不同的畸形和尿路扩张(UTD)分类,主要结局是反复住院,尿路感染(UTI),黄疸,和手术。
    结果:在我们中心的1137名患有产前HN的儿童中,188例(16.5%)在出生后早期得到随访,畸形110例(58.5%)。畸形中反复住院(29.8%)和UTI(72.5%)的发生率较高,但非畸形组黄疸发生率(46.2%)较高(P<0.001)。此外,膀胱输尿管反流(VUR)的UTI和黄疸高于输尿管-骨盆连接部梗阻(UPJO)(P<0.05)。同时,UTDP2和UTDP3患儿易发生复发性UTI,但UTDP0易发生黄疸(P<0.001)。此外,30例(16.0%)手术均有畸形,UTDP2和UTDP3的手术率高于UTDP0和UTDP1(P<0.001)。最后,我们得出结论,第一次随访应该少于7天,第一次评估应该是两个月,随访应至少每3个月一次。
    结论:产前HN患儿在出生后早期发现了许多畸形,高等级UTD更容易发生复发性UTI,甚至手术。所以,有畸形和高级别UTD的产前HN应在产后早期定期随访。
    The study aims to investigate the clinical characteristics of early postnatal period in children with prenatal hydronephrosis (HN) in our single center for 8 years.
    The clinical data of 1137 children with prenatal HN from 2012 to 2020 were retrospectively analyzed in our center. Variables of our study mainly included different malformations and urinary tract dilation (UTD) classification, and main outcomes were recurrent hospitalization, urinary tract infection (UTI), jaundice, and surgery.
    Among the 1137 children with prenatal HN in our center, 188 cases (16.5%) were followed-up in early postnatal period, and 110 cases (58.5%) were found malformations. The incidence of recurrent hospitalization (29.8%) and UTI (72.5%) were higher in malformation, but the incidence of jaundice (46.2%) was higher in non-malformation(P < 0.001). Furthermore, UTI and jaundice were higher in vesicoureteral reflux (VUR) than those in uretero-pelvic junction obstruction (UPJO) (P < 0.05). Meanwhile, Children with UTD P2 and UTD P3 were prone to recurrent UTI, but UTD P0 was prone to jaundice (P < 0.001). In addition, 30 cases (16.0%) of surgery were all with malformations, and the surgical rates of UTD P2 and UTD P3 were higher than those of UTD P0 and UTD P1 (P < 0.001). Lastly, we concluded that the first follow-up should be less than 7 days, the first assessment should be 2 months, and the follow up should be at least once every 3 months.
    Children with prenatal HN have been found many malformations in early postnatal period, and with high-grade UTD were more prone to recurrent UTI, even to surgery. So, prenatal HN with malformations and high-grade UTD should be followed up in early postnatal period regularly.
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  • 文章类型: Journal Article
    背景:Galen畸形静脉(VOGM)是一种罕见的,新生儿危及生命的血管畸形,并接受栓塞治疗。然而,即使在最有经验的中心,患者面临高死亡率和发病率。子宫内治疗选择由于缺乏动物模型或模拟而受到限制。
    目的:创建一种新型超声体模模拟器,用于子宫内胎儿介入治疗VOGM的临床前可行性研究。
    方法:用冷冻凝胶材料设计并构建了两种球形和挡风玻璃形状的新型体模,以模拟胎儿VOGM的显着脉管系统,基于真实患者胎儿MR成像尺寸。在此模型中逼真地模仿了关键解剖结构,并模拟了跨血管超声引导的线圈部署。在处理之前和之后评估每个体模模型以评估靶内的线圈质量沉积。
    结果:对两个体模进行了预处理T2加权MR成像评估,超声引导栓塞,治疗后MR和荧光成像,并对切片的体模进行目视检查,以进行目标栓塞验证。术后MR扫描证实了线圈质量在中央腔内的真实紧凑沉积。幻影栓塞结果作为机构审查委员会和美国食品和药物管理局调查设备豁免批准的一部分提交,用于对VOGM进行胎儿干预的人类首次临床试验。
    结论:用于胎儿VOGM干预的体模模拟器在试验干预期间产生了逼真的结果,消除可行性和安全性评估的障碍,通常由于没有适当的动物模型而被排除在外。该研究为医学模拟的潜在更广泛的应用提供了概念证明,以实现神经干预的新程序进步。
    BACKGROUND: Vein of Galen malformation (VOGM) is a rare, life-threatening vascular malformation in neonates and is treated with embolization. However, even at the most experienced centers, patients face high mortality and morbidity. In utero treatment options have been limited by lack of animal models or simulations.
    OBJECTIVE: To create a novel ultrasound phantom simulator for a preclinical feasibility study of in utero fetal intervention for VOGM.
    METHODS: Novel phantoms were designed and built in two configurations of spherical and windsock shape from cryogel material to mimic the salient vasculature of the fetal VOGM, based on real-patient fetal MR imaging dimensions. Critical anatomy was realistically mimicked within this model and transtorcular ultrasound-guided coil deployment was simulated. Each phantom model was assessed before and after treatment to evaluate coil mass deposition within the target.
    RESULTS: The two phantoms underwent pretreatment T2-weighted MR imaging assessment, ultrasound-guided embolization, post-treatment MR and fluoroscopic imaging, and visual inspection of the sliced phantoms for target embolization verification. Postoperative MR scans confirmed realistic compact deposition of the coil masses within the central cavity. Phantom embolization results were submitted as part of the institutional review board and US Food and Drug Administration investigative device exemption approval for a first-in-humans clinical trial of fetal intervention for VOGM.
    CONCLUSIONS: A phantom simulator for fetal intervention of VOGM produces lifelike results during trial interventions, removing obstacles to feasibility and safety evaluations, typically precluded by non-availability of appropriate animal models. The study provides a proof of concept for potentially wider applications of medical simulation to enable novel procedural advancements in neurointerventions.
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