共查询到14条相似文献,搜索用时 54 毫秒
1.
目的:比较实时三维超声输卵管造影与X线造影检查诊断女性不孕症患者输卵管病变的临床应用价值。方法:选择2014年3月至2016年12月我院诊治的不孕症患者60例作为研究对象,所有患者都于月经干净后3-7 d同时随机实施实时三维超声输卵管造影与X线造影检查,观察并记录造影图像质量与诊断结果,比较两种方法的诊断效果。结果:实时三维超声输卵管造影与X线造影的图像质量优良率分别为98.3%和86.7%,实时三维超声输卵管造影的图像质量明显高于X线造影(P0.05)。实时三维超声输卵管造影与X线造影诊断不孕症患者输卵管不通畅率分别为56.7%和46.7%,实时三维超声输卵管造影组显著高于X线造影组(P0.05)。输卵管通畅性评价金标准腹腔镜下通液术诊断发现输卵管不通畅35例,在此基础上实时三维超声输卵管造影与X线造影检查不孕症的敏感性分别为97.1%和80.0%,特异性均为100.0%,超声诊断的敏感性明显高于X线(P0.05)。结论:相对于X线造影,实时三维超声输卵管造影检查不孕症患者输卵管病变的图像质量更好,有利于疾病的判断,对输卵管通畅度判断更精确,利于后期治疗及疾病预防,还可提高诊断敏感性。 相似文献
2.
摘要 目的:探讨不孕症女性三维子宫输卵管造影联合阴道二维超声的诊断意义。方法:2019年3月至2020年10月选择在西安医学院第二附属医院和陕西省人民医院诊治的不孕症女性患者90例,所有患者都给予三维子宫输卵管造影联合阴道二维超声检查,记录成像质量与疼痛情况。以X线子宫输卵管造影为金标准,判断诊断价值。结果:检查过程中三维超声造影患者的疼痛评分高于二维超声,对比差异无统计学意义(P>0.05)。三维超声造影的成像质量优良率为100.0 %(90/90),高于二维超声的93.3 %(84/90),对比差异有统计学意义(P<0.05)。在90例患者中,三维超声造影判断为卵巢周围组织弥散1级59例,2级16例,3级10例,4级5例。三维子宫输卵管造影联合阴道二维超声判断为输卵管通畅55例,通而不畅25例,阻塞10例。X线子宫输卵管造影判断为输卵管通畅53例,通而不畅26例,阻塞11例,三维子宫输卵管造影联合阴道二维超声诊断的准确性为96.7 %(87/90)。结论:三维子宫输卵管造影联合阴道二维超声在不孕症女性的应用并不会增加患者疼痛,且能提高成像质量,也有利于合理评价与判断患者的输卵管通畅情况。 相似文献
3.
摘要 目的:探讨高频超声与超声造影对甲状腺癌侵袭性的诊断价值。方法:2016年2月至2019年10月选择在本院诊治的甲状腺癌患者88例作为研究对象,所有患者都给予高频超声与超声造影诊断,记录影像学特征。检测所有患者侵袭性指标表达情况并判断诊断价值。结果:在88例患者中,病理检出颈部转移性淋巴结22例(转移组),检出率为25.0 %。转移组的病灶钙化、边界模糊、纵横比≥1、内部血流信号、低回声等比例都显著高于非转移组(P<0.05)。转移组的淋巴结长径、短径显长于非转移组(P<0.05),两组长短径比值对比无差异(P>0.05)。转移组的峰值强度(Peak intensity,PI)、平均通过时间(Mean transit time,MTT)、达峰时间(Peak time,TIP)值显著高于非转移组(P<0.05)。转移组的ADAM9、Notch-1、CXCR4 mRNA相对表达水平都显著高于非转移组(P<0.05)。高频超声与超声造影对甲状腺癌侵袭性的诊断敏感性为95.2 %和95.5 %,特异性为100.0 %和100.0 %。结论:高频超声与超声造影对甲状腺癌侵袭性都有很好的诊断敏感性与特异性,可为甲状腺癌颈部淋巴结转移的诊断提供补充性的定性和定量分析的方法。 相似文献
4.
目的:调查与分析四维子宫输卵管超声造影假阳性与假阴性的原因.方法:选择2015年6月到2019年8月在本院妇产科临床初步诊断为输卵管不孕症患者125例,所有患者都给予X线子宫输卵管碘油造影(Hysterosalp ingography,HSG)与四维子宫输卵管超声造影,记录诊断效果、不良反应,判断假阳性与假阴性的发生原... 相似文献
5.
目的:探讨与评价全氟显子宫输卵管四维超声造影(4D-HyCoSy)与经阴道三维超声输卵管造影(3D-HyCoSy)对输卵管性不孕症患者的诊断效果。方法:选择2018年8月到2021年11月选择在本院诊治的女性不孕症患者84例作为研究对象,都给予全氟显4D-HyCoSy与3D-HyCoSy诊断,记录图像质量与不良反应发生情况。金标准为腹腔镜检查,判断诊断效果。结果:在84例患者中,全氟显4D-HyCoSy的图像质量优良率为100.0%,高于3D-HyCoSy的92.9%(P<0.05)。全氟显4D-HyCoSy诊断为输卵管通畅14例,输卵管通而不畅23例,输卵管阻塞47例。3D-HyCoSy诊断:22例输卵管通畅,21例输卵管通而不畅,41例输卵管阻塞。腹腔镜诊断:15例输卵管通畅,21例输卵管通而不畅,48例输卵管阻塞。全氟显4D-HyCoSy、3D-HyCoSy对输卵管性不孕症患者的诊断敏感性为100.0%(36/36)、97.2%(35/36),特异性为97.9%(47/48)、83.3%(40/48)。84例患者在全氟显4D-HyCoSy、3D-HyCoSy检查期间发生的不... 相似文献
6.
目的:研究全氟丙烷人血白蛋白微球注射液(简称全氟丙烷白蛋白)在评价输卵管通畅性的临床应用效果。方法:96例不孕症患者分为两组,分别应用全氟丙烷白蛋白和Sono Vue进行子宫输卵管造影,实时观察造影剂在子宫、输卵管及盆腔显影情况,判断输卵管通畅性并记录病人即时疼痛指数。其中全氟丙烷白蛋白组中19例进行X线子宫输卵管造影。结果:两组超声造影结果对比,显影清晰率、图像质量及即时疼痛指数无统计学差异,一致性较好。全氟丙烷白蛋白Hy Co Sy组19例同时进行X线子宫输卵管造影,两种方法一致程度较好。结论:应用全氟丙烷白蛋白进行子宫输卵管超声造影可作为临床评价输卵管通畅性的一种有效方法。 相似文献
7.
目的:分析超声弹性成像与超声造影对肝肿瘤的诊断效果。方法:收集我院2015年3月至2016年3月收治的肝肿瘤患者76例,术前均行超声弹性成像和超声造影检查,比较超声弹性成像和超声造影与病理诊断(黄金标准)的结果。结果:超声弹性成像与病理检查结果比较无统计学差异(P0.05);超声造影与病理检查结果无统计学差异(P0.05);超声弹性成像和超声造影的敏感性、特异性、准确性无统计学差异(P0.05)。结论:超声弹性成像、超声造影对肝肿瘤诊断中均有重要价值,建议二者联合检测,提高肝肿瘤检出准确率。 相似文献
8.
目的:探讨实时三维经胸超声心动图检测左心房(LA)功能以评价二尖瓣成形术(MVR)疗效的价值。方法:选择87例二尖瓣关闭不全患者(病例组)分别在MVR术前及术后1 w、24 w采取实时三维经胸超声心动图检测LA的最大容积(maximum volume of LA,LAV_(max))、最小容积(the minimum volume of LA,LAV_(min))、收缩前容积(systolic volume,LAV_p)及射血分数(ejection fraction,LAEF)、被动射血分数(passive ejection fraction,LAPEF)及主动射血分数(active ejection fraction,LAAEF)等指标,并与同期80例健康志愿者作对照。结果:病例组术前LAV_(max)I、LAV_(min)I、LAV_pI、LAEF、LAPEF、LAAEF值与对照组比较差异有统计学意义(P0.05),术后1 w、24 w,LAV_(max)I、LAV_(min)I、LAV_pI、LAEF、LAPEF持续改善(P0.05),LAPEF无明显变化(P0.05)。术后24 w,LA严重扩张由术前58.6%降低到12.6%,67.8%发生LA重构。结论:实时三维经胸超声心动图显示MVR术后LA容积与功能好转,对评价MVR的疗效有一定价值。 相似文献
9.
摘要 目的:探讨系统活检联合超声造影及弹性成像靶向活检在前列腺活检中的应用价值。方法:回顾性分析2015年1月至2019年12月我院收治的394例可疑前列腺癌患者的临床资料。分为前期组(2015年1月至2017年4月,采用12针系统活检法,共186例),和近期组(2017年5月至2019年12月,采用8针系统活检联合新技术(超声造影及弹性成像)靶向活检法,共208例)。前期组行12+X针系统穿刺活检。近期组患者先行彩虹灌注及实时弹性成像检查,确定可疑区域后,于该区域行靶向穿刺活检,然后行8针系统穿刺活检,有重复区域者适当减少穿刺针数。结果:近期组阳性患者99例;前期组阳性患者63例,前列腺癌检出率分别为47.6%(99/208)、33.87%(63/186),差异具有统计学意义(P<0.05);近期组与前期组总穿刺针数分别为1929、2200针,近期组平均9.0 1.8针,前期组平均11.8 1.6针,差异具有统计学意义(P<0.05);近期组与前期组穿刺针数阳性率分别为23.89%(461/1929)、11.82%(260/2200),差异具有统计学意义(P<0.05);近期组与前期组并发症发生率分别为27.40%(57/208)、43.01%(80/186),差异具有统计学意义(P<0.05)。结论:系统活检联合超声造影及弹性成像靶向活检对前列腺癌具有较高应用价值。 相似文献
10.
摘要 目的:探讨实时三维超声心动图(RT-3DE)联合血清N末端脑钠肽前体(NT-proBNP)、肾上腺髓质素前体中段肽(MR-proADM)、可溶性人基质裂解素2(sST2)对心力衰竭(HF)患者诊断及预后的评估价值。方法:选择2020年3月至2022年10月阳光融和医院收治的112例HF患者(HF组),另选择同期体检健康的50例志愿者(对照组)。所有受试者均接受RT-3DE检查,同时检测血清NT-proBNP、MR-proADM、sST2水平。对比两组RT-3DE参数和血清NT-proBNP、MR-proADM、sST2水平。HF患者出院后随访6个月,统计患者预后情况;根据预后将患者分为预后不良组(37例)和预后良好组(75例)。受试者工作特征(ROC)曲线分析RT-3DE参数联合血清NT-proBNP、MR-proADM、sST2诊断HF的临床价值及对预后不良的预测价值。结果:HF组左室收缩末期容积(LVESV)、左室舒张末期容积(LVEDV)、左室舒张末期容积指数(LVEDVI)、收缩末期容积指数(LVESVI)、血清NT-proBNP、MR-proADM、sST2水平高于对照组(P<0.05),左室射血分数(LVEF)低于对照组(P<0.05)。RT-3DE参数联合血清NT-proBNP、MR-proADM、sST2诊断HF的曲线下面积(AUC)为0.902,高于各指标单独诊断。预后不良组LVESV、LVEDV、LVEDVI、LVESVI、血清NT-proBNP、MR-proADM、sST2水平高于预后良好组(P<0.05),LVEF低于预后良好组(P<0.05)。RT-3DE参数联合NT-proBNP、MR-proADM、sST2预测HF预后不良的AUC为0.937,高于各指标单独预测。结论:HF患者LVESV、LVEDV、LVEDVI、LVESVI、血清NT-proBNP、MR-proADM、sST2水平增高,LVEF降低,联合RT-3DE参数和血清NT-proBNP、MR-proADM、sST2可提高对HF诊断和预后预测的效能。 相似文献
11.
Both estrogen and leptin play an important role in the regulation of physiological processes of endochondral bone formation in linear growth. Estrogen receptors (ERα and ERβ) are known as members of the superfamily of nuclear steroid hormone receptors and are detected in all zones of growth plate chondrocytes. They can be regulated in a ligand-independent manner. Whether leptin regulates ERs in the growth plate is still not clear. To explore this issue, chondrogenic ATDC5 cells were used in the present study. Messenger RNA and protein analyses were performed by quantitative PCR and Western blotting. We found that both ERα and ERβ were dynamically expressed during the ATDC5 cell differentiation for 21 days. Leptin (50 ng/ml) significantly upregulated ERα and ERβ mRNA and protein levels 48 h after leptin stimulation (P<0.05) at day 14. The up-regulation of ERα and ERβ mRNA by leptin was shown in a dose-dependent manner, but the most effective dose of leptin was different (100 and 1,000 ng/ml, respectively). Furthermore, we confirmed that leptin augmented the phosphorylation of ERK1/2 in a time-dependent manner. A maximum eightfold change was observed at 15 min. Finally, a specific ERK1/2 inhibitor, UO126, blocked leptin-induced ERs regulation in ATDC5 cells, indicating that ERK1/2 mediates, partly, the effects of leptin on ERs. These data demonstrate, for the first time, that leptin regulates the expression of ERs in growth plate chondrocytes via ERK signaling pathway, thereby suggesting a crosstalk between leptin and estrogen receptors in the regulation of bone formation. 相似文献
12.
Hartmut Kayser Karlheinz Mann Manfred Nimtz Shirley A. Müller 《Journal of molecular biology》2009,389(1):74-89
The abundant blue hemolymph protein of the last instar larvae of the moth Cerura vinula was purified and characterized by protein-analytical, spectroscopic and electron microscopic methods. Amino acid sequences obtained from a large number of cleavage peptides revealed a high level of similarity of the blue protein with arylphorins from a number of other moth species. In particular, there is a high abundance of the aromatic amino acids tyrosine and phenylalanine amounting to about 19% of total amino acids and a low content of methionine (0.8%) in the Cerura protein. The mass of the native protein complex was studied by size-exclusion chromatography, analytical ultracentrifugation, dynamic light scattering and scanning transmission electron microscopy and found to be around 500 kDa. Denaturating gel electrophoresis and mass spectrometry suggested the presence of two proteins with masses of about 85 kDa. The native Cerura protein is, therefore, a hexameric complex of two different subunits of similar size, as is known for arylphorins. The protein was further characterized as a weakly acidic (pI ∼ 5.5) glycoprotein containing mannose, glucose and N-acetylglucosamine in an approximate ratio of 10:1:1. The structure proposed for the most abundant oligosaccharide of the Cerura arylphorin was the same as already identified in arylphorins from other moths. The intense blue colour of the Cerura protein is due to non-covalent association with a bilin of novel structure at an estimated protein subunit-to-ligand ratio of 3:1. Transmission electron microscopy of the biliprotein showed single particles of cylindrical shape measuring about 13 nm in diameter and 9 nm in height. A small fraction of particles of the same diameter but half the height was likely a trimeric arylphorin dissociation intermediate. Preliminary three-dimensional reconstruction based on averaged transmission electron microscopy projections of the individual particles revealed a double-trimeric structure for the hexameric Cerura biliprotein complex, suggesting it to be a dimer of trimers. 相似文献
13.
Cristina Pagliano Jon Nield Francesco Marsano Tillmann Pape Simone Barera Guido Saracco James Barber 《BBA》2014
In higher plants a variable number of peripheral LHCII trimers can strongly (S), moderately (M) or loosely (L) associate with the dimeric PSII core (C2) complex via monomeric Lhcb proteins to form PSII–LHCII supercomplexes with different structural organizations. By solubilizing isolated stacked pea thylakoid membranes either with the α or β isomeric forms of the detergent n-dodecyl-D-maltoside, followed by sucrose density ultracentrifugation, we previously showed that PSII–LHCII supercomplexes of types C2S2M2 and C2S2, respectively, can be isolated [S. Barera et al., Phil. Trans. R Soc. B 67 (2012) 3389–3399]. Here we analysed their protein composition by applying extensive bottom-up and top-down mass spectrometry on the two forms of the isolated supercomplexes. In this way, we revealed the presence of the antenna proteins Lhcb3 and Lhcb6 and of the extrinsic polypeptides PsbP, PsbQ and PsbR exclusively in the C2S2M2 supercomplex. Other proteins of the PSII core complex, common to the C2S2M2 and C2S2 supercomplexes, including the low molecular mass subunits, were also detected and characterized. To complement the proteomic study with structural information, we performed negative stain transmission electron microscopy and single particle analysis on the PSII–LHCII supercomplexes isolated from pea thylakoid membranes solubilized with n-dodecyl-α-D-maltoside. We observed the C2S2M2 supercomplex in its intact form as the largest PSII complex in our preparations. Its dataset was further analysed in silico, together with that of the second largest identified sub-population, corresponding to its C2S2 subcomplex. In this way, we calculated 3D electron density maps for the C2S2M2 and C2S2 supercomplexes, approaching respectively 30 and 28 Å resolution, extended by molecular modelling towards the atomic level. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: Keys to Produce Clean Energy. 相似文献
14.
《Journal of molecular biology》2021,433(20):167124
The prediction of highly ordered three-dimensional structures of amyloid protein fibrils from the amino acid sequences of their monomeric self-assembly precursors constitutes a challenging and unresolved aspect of the classical protein folding problem. Because of the polymorphic nature of amyloid assembly whereby polypeptide chains of identical amino acid sequences under identical conditions are capable of self-assembly into a spectrum of different fibril structures, the prediction of amyloid structures from an amino acid sequence requires a detailed and holistic understanding of its assembly free energy landscape. The full extent of the structure space accessible to the cross-β molecular architecture of amyloid must also be resolved. Here, we review the current understanding of the diversity and the individuality of amyloid structures, and how the polymorphic landscape of amyloid links to biology and disease phenotypes. We present a comprehensive review of structural models of amyloid fibrils derived by cryo-EM, ssNMR and AFM to date, and discuss the challenges ahead for resolving the structural basis and the biological consequences of polymorphic amyloid assemblies. 相似文献

