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2015 International Conference on Biomedical Engineering and Computational Technologies (SIBIRCON)最新文献

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Computer modeling of stress-strain state of the intact portion of the coronary artery with circular irregular stenosis 环形不规则狭窄冠状动脉完整部分应力-应变状态的计算机模拟
P. Alexey, V. Alexey
According to the world health organization, diseases of the cardiovascular system occupy a leading place among the pathologies on disability and mortality in developed countries, and the defeat of coronary arteries, in turn, leads to coronary heart disease. The simulation of condition and parameters of coronary arteries with atherosclerotic lesions is an actual problem of modern biomechanics. The aim of the present work was to study the stress-strain state of the intact portion of the coronary artery with uniform circular stenosis. 3D computer modeling of the stress - strain state of the intact portion of the coronary artery with a circular irregular stenosis, the study of its mechanical parameters in accordance with the load on it with the atherosclerotic plaque and during stenting was performed. Comparative analysis of the influence of boundary conditions fixing the coronary arteries relative to the epicardium and geometric characteristics of the stenosis on the basic mechanical parameters of the stress-strain state of an artery was realized. The results of this analysis allow to minimize the dimension of the input data that affect the computer simulation. The results of study suggest of the necessity of development and creation of expert decision support system for interventional cardiologist in the field of stent size selection and balloon blowup pressure to reduce the traumatization of the endothelial vessel's layer during the operation, as well as reducing the duration of the procedure.
据世界卫生组织(who)统计,在发达国家导致残疾和死亡的疾病中,心血管疾病占据了首位,冠状动脉的衰竭导致冠心病。冠状动脉粥样硬化病变的状态和参数模拟是现代生物力学中的一个实际问题。本研究的目的是研究均匀圆形狭窄的冠状动脉完整部分的应力-应变状态。对环形不规则狭窄的冠状动脉完整段的应力-应变状态进行了三维计算机建模,研究了冠状动脉粥样硬化斑块对其施加的载荷和支架置入期间的力学参数。对比分析了冠状动脉相对于心外膜的固定边界条件和狭窄的几何特征对动脉应力-应变状态基本力学参数的影响。这种分析的结果允许最小化影响计算机模拟的输入数据的维度。研究结果提示有必要开发和创建介入心脏病专家在支架尺寸选择和气囊充气压力方面的专家决策支持系统,以减少手术过程中对内皮血管层的创伤,缩短手术时间。
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引用次数: 0
Multiplex detection of IgG class antibodies to Toxoplasma gondii, Rubella virus, Cytomegalovirus and Herpes virus using a novel multiplex flow immunoassay 用一种新的多重流免疫分析法检测刚地弓形虫、风疹病毒、巨细胞病毒和疱疹病毒IgG类抗体
S. Dolgushin, S. Selishchev, E. Loseva, E. Odintsova, A. Tronin
Preclinical tests of a novel multiplex immunoassay for the detection of TORCH infections in human serum using flow cytometry are presented. The immunoassay is intended for the qualitative detection of specific human IgG class antibodies to Toxoplasma gondii, Rubella virus Cytomegalovirus and Herpes virus in human serum. Multiplex analysis is performed in vitro on polystyrene microspheres encoded with organic dye. The diagnostic sensitivity of the kit is evaluated to be not less than 95%.
一种新型的多重免疫分析法用于检测TORCH感染在人血清中使用流式细胞术的临床前试验。本方法适用于人血清中弓形虫、风疹病毒、巨细胞病毒和疱疹病毒特异性IgG类抗体的定性检测。多重分析进行了体外与有机染料编码聚苯乙烯微球。经评估,试剂盒的诊断灵敏度不低于95%。
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引用次数: 1
Development of microbicide equipment and research in pathogen inactivation by cold argon plasma 杀微生物设备的研制及冷氩等离子体灭活病原体的研究
A. Semyonov, B. Baldanov, Ts. V. Ranzhurov, E. Nikolayev, S. Gomboyeva
The high bactericidal effect of cold argon plasma generated by low-current spark discharge plasma jets at atmospheric pressure has been presented. It has been found that the direct contact of low-current spark plasma jets helps perform effective inactivation of bacteria.
介绍了常压下小电流火花放电等离子体射流产生的冷氩等离子体的高杀菌效果。研究发现,低电流火花等离子体射流的直接接触有助于有效地灭活细菌。
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引用次数: 0
Diagnostic nanoprobes based on the conjugates of quantum dots and single-domain antibodies for cancer biomarkers detection in immunohistochemistry and flow cytometry 基于量子点和单域抗体偶联物的诊断纳米探针在免疫组织化学和流式细胞术中检测癌症生物标志物
A. Sukhanova, J. Millot, M. Pluot, J. Cohen, I. Nabiev
Monoclonal antibodies (mAbs) are often too big for the nanoparticle targeting purpose and the conditions used for their conjugation provide nanoprobes with irregular orientation of mAbs on the surface of nanoparticle. Here, we are reviewing our recent publications reporting on ultra-small nanoprobes engineered through oriented conjugation of quantum dots (QDs) with 13-kDa single-domain antibodies (sdAbs) derived from llama and produced in E. coli. Developed nanoprobes with hydrodynamic diameter below 12 nm contain four homogeneously oriented copies of sdAbs on the surface of each QD. They demonstrated excellent specificity and sensitivity for the quantitative detection of rare biomarker-expressing cells using flow cytometry. The higher diffusibility of sdAbs enables immunohistochemical analysis of thick tissues not accessible to mAbs. The data shows that sdAbs-QD conjugates lead to biopsy tissue labelling displaying an equivalent or even better quality than that obtained with gold standard immunohistochemical diagnostics. Developed sdAbs-QD nanoprobes should find numerous applications in multiplexed high-throughput diagnostics and FRET-based detection platforms.
单克隆抗体(mab)对于纳米颗粒的靶向作用来说通常太大,并且它们的偶联条件使得纳米探针在纳米颗粒表面具有不规则的单克隆抗体取向。在这里,我们回顾了我们最近发表的关于量子点(QDs)与13kda单域抗体(sabs)定向偶联的超小型纳米探针的报道,这些抗体来源于羊驼,并在大肠杆菌中产生。所开发的水动力直径小于12 nm的纳米探针在每个量子点表面含有4个均匀取向的单克隆抗体拷贝。它们在流式细胞术中对表达罕见生物标志物的细胞进行定量检测时表现出极好的特异性和敏感性。单克隆抗体的高扩散性使得单克隆抗体无法对厚组织进行免疫组化分析。数据显示,sabs - qd偶联物导致活检组织标记显示出与金标准免疫组织化学诊断获得的相同甚至更好的质量。开发的sds - qd纳米探针应该在多路高通量诊断和基于fret的检测平台中找到许多应用。
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引用次数: 1
Patient-specific 1D model of the human cardiovascular system 人体心血管系统患者特异性1D模型
I. Kiselev, F. Kolpakov, E. Biberdorf, V. Baranov, T. G. Komlyagina, I. Suvorova, V. Melnikov, S. Krivoschekov
A technique of parameter personalization of a 1d hemodynamic model is discussed and validated against physiological data of 1546 examined patients. Different parameter combinations were used, with the quality of prediction of the systolic and diastolic pressures used as the principle validation criterion. It is shown that with an appropriate personalization the model can provide adequate predictions (correlations near 0.9), where the decisive role is played by the total peripheral resistance parameter. Meanwhile parameters of the largest arteries do not play a significant role in the prediction.
本文讨论了一维血流动力学模型的参数个性化技术,并对1546例检查患者的生理数据进行了验证。采用不同的参数组合,以预测收缩压和舒张压的质量作为主要验证标准。结果表明,通过适当的个性化,该模型可以提供足够的预测(相关性接近0.9),其中决定性作用由总外围电阻参数起作用。同时,大动脉参数在预测中作用不显著。
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引用次数: 2
Digraph based medical treatment planning 基于有向图的医疗计划
M. Levin
The paper focuses on framework of combinatorial planning for medical treatment on the basis of digraph with three-component vertices (analysis/diagnosis, de-sign/implementation, analysis/decision). A generalized medical treatment plan is considered as a route/trajectory over the digraph. The set of used underlying problems involves: (a) multicriteria analysis/diagnosis, (b) multicriteria selection/design, (c) selection of the treatment direction. Combinatorial synthesis based on morphological clique is used (i.e., Hierarchical Morphological Design). An illustrative numerical example corresponds to children asthma.
本文重点研究了基于三分量顶点有向图(分析/诊断、设计/实施、分析/决策)的医疗组合规划框架。广义的医疗计划被认为是有向图上的一条路线/轨迹。所使用的潜在问题包括:(a)多标准分析/诊断,(b)多标准选择/设计,(c)治疗方向的选择。采用基于形态团的组合合成(即层次形态设计)。一个说明性的数值例子对应于儿童哮喘。
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引用次数: 1
The potential of lasing in quantum dots for sensing and diagnostic applications 量子点激光在传感和诊断应用中的潜力
S. Dayneko, I. Nabiev
Sensing with semiconductor colloidal quantum dots (QDs) is driven by attractive properties of these fluorophores such as spectrally narrow and tunable emission and broad absorption spectra, which enable simultaneous excitation of fluorescence of different colors. The possibility of lasing upon inclusion of QDs into microcavities offers new opportunities for highly sensitive sensing. Here, we discuss the fundamental properties of QDs, the principles of lasing from QDs, and potential applications of the effect of QD lasing to diagnostics and ultrasensitive sensing.
半导体胶体量子点(QDs)的传感是由这些荧光团的吸引特性驱动的,如光谱窄和可调谐的发射光谱和宽吸收光谱,这使得能够同时激发不同颜色的荧光。将量子点包含在微腔中产生激光的可能性为高灵敏度传感提供了新的机会。本文讨论了量子点的基本性质,量子点的激光原理,以及量子点激光在诊断和超灵敏传感方面的潜在应用。
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引用次数: 0
Linguistic view on brain-computer interface 脑机接口的语言学观点
Mariya K. Timofeeva
Being a sort of communication, Brain-Computer Interface (BCI) uses a language, and therefore can be an object of linguistic consideration. This fact gives rise to two questions. What analogies can be found between BCI and linguistic approaches, methods, experience; what hypothesis about applicability of linguistics to BCI can be proposed? What challenges for linguistics can result from prospective development of BCI? The paper considers both issues. For the first it draws parallels between BCI (particularly training the BCI skill) and field linguistics. For the second the paper considers challenges connected with general and semantic linguistic issues.
脑机接口(BCI)作为一种通信方式,使用一种语言,因此可以成为语言学研究的对象。这一事实引起了两个问题。脑机接口和语言学的方法、方法、经验有什么相似之处?关于语言学对脑机接口的适用性,可以提出什么假设?脑机接口的未来发展会给语言学带来哪些挑战?本文考虑了这两个问题。首先,它将脑机接口(特别是训练脑机接口技能)与现场语言学相提并论。其次,本文考虑了与一般语言学和语义语言学问题相关的挑战。
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引用次数: 1
Effect of electron-beam irradiation on electrospinning produced scaffolds 电子束辐照对静电纺丝制备支架的影响
A. Stepanova, M. V. Korobeinikov, A. S. Yunoshev, P. Laktionov
The influence of electron beam irradiation on the stiffness, stability and biocompatibility of electrospun scaffolds, produced from Nylon 6, polycaprolactone (PCL) and poly(DL-lactic-co-glicolic acid) (PLGA) was investigated. It was shown that irradiation of the matrices with an electron beam generated by the electron beam accelerator ILA-6 (2.2 MeV, 400 mA 10 Hz, “Radiochemical technologies Ltd”) can potentially be used for sterilization of the matrices (irradiation by a dose of 25 kGy does not interfere with the mechanical properties of all studied matrices). Irradiation of the matrices produced from PCL by a dose of 100 kGy increases the proportional limit of the material and allowed us to introduce durable regions into the vascular grafts by irradiating the graft through the template with open areas. Electron beam irradiation of the matrices does not interfere with the capacity of the matrices to support adhesion and viability of primary human endotheliocytes at the surfaces of these matrices, as it was shown using Alamar Blue assay.
研究了电子束辐照对尼龙6、聚己内酯(PCL)和聚乳酸-羟基乙酸(PLGA)制备的电纺丝支架的刚度、稳定性和生物相容性的影响。结果表明,用电子束加速器ILA-6 (2.2 MeV, 400 mA 10 Hz,“放射化学技术有限公司”)产生的电子束照射基质可以潜在地用于基质的灭菌(25 kGy的剂量照射不会干扰所有研究基质的机械性能)。以100 kGy的剂量照射PCL产生的基质增加了材料的比例限制,并允许我们通过具有开放区域的模板照射移植物,从而将耐久区域引入血管移植物。正如Alamar Blue实验所显示的那样,电子束照射基质不会干扰基质在这些基质表面支持粘附和原代人内皮细胞活力的能力。
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引用次数: 1
Microcubes aided photonic jet scalpel tips for potential use in ultraprecise laser surgery 微立方体辅助光子射流手术刀尖端在超精密激光手术中的潜在应用
O. Minin, I. Minin, Nikita A. Kharitoshin
The task of development of compact light-focusing tools for biomedical applications is challenging due to subwavelength focusing in such devices. In this study we have shown that it is possible to focusing light beyond the diffraction limit by 3D mesoscale particles in application to laser scalpel tips for potential use in ultraprecise laser surgery. The focusing properties as a single as a chain of cubic particles including metamaterials are discussed to form ultraprecise subdiffraction area both axisymmetrical and curvelinear (photonic hook scalpel).
由于此类设备中的亚波长聚焦,开发用于生物医学应用的紧凑型光聚焦工具的任务具有挑战性。在这项研究中,我们已经证明,在激光手术刀尖端的应用中,3D中尺度粒子可以聚焦超过衍射极限的光,从而有可能用于超精密激光手术。讨论了包括超材料在内的单一立方粒子链在形成轴对称和曲线(光子钩刀)超精密亚衍射区域时的聚焦特性。
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引用次数: 8
期刊
2015 International Conference on Biomedical Engineering and Computational Technologies (SIBIRCON)
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