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Cranial nerve monitoring in endoscopic endonasal surgery of skull base tumors (observing of 23 cases)

Chinese Neurosurgical Journal 2019年第1期5卷 21-29页

作者： A.N.Shkarubo I.v.Chernov A.A.Ogurtsova v.E.Chernov O.v.Borisov k.v.koval D.N.Andreev Department of Neurooncology Federal State Autonomous Institution"N.N.Burdenko National Medical Research Center of Neurosurgery"of the Ministry of Health of the Russian FederationMoscowRussia Department of Neurophysiology Federal State Autonomous Institution"N.N.Burdenko National Medical Research Center of Neurosurgery"of the Ministry of Health of the Russian FederationMoscowRussia Department of Neurosurgery N.N.Burdenko Main Military Clinical Hospital of the Ministry of Defense of the Russian FederationMoscowRussia Laboratory of Molecular Human Genetics Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological AgencyMoscowRussia

Background:Preservation of anatomic integrity and function of the cranial nerves during the removal of skull base tumors is one of the most challenging procedures in endoscopic endonasal *** is possible to use intraoperative mapping and identification of the cranial nerves in order to facilitate their *** purpose of this study was to evaluate the effectiveness of intraoperative trigger electromyography in prevention of iatrogenic damage to the cranial ***:Twenty three patients with various skull base tumors(chordomas,neuromas,pituitary adenomas,meningiomas,cholesteatomas)underwent mapping and identification of cranial nerves during tumor removal using the endoscopic endonasal approach in Department of Neurooncology of Federal State Autonomous Institution"*** National Medical Research Center of Neurosurgery"of the Ministry of Health of the Russian Federation from 2013 to *** the surgical interventions,mapping and identification of the cranial nerves were carried out using electromyography in triggered *** effectiveness of the method was evaluated based on a comparison with a control group(41 patients).Results:In the main group of patients,44 nerves were examined during surgery using triggered *** the study,the III,v,vI,vII,and XII cranial nerves were identified *** cranial nerve deficiency was observed in 5 patients in the study group and in 13 patients in the control *** average length of hospitalization was 9 ***:We did not receive statistically significant data supporting the fact that intraoperative identification of cranial nerves using trigger electromyography reduces the incidence of postoperative complications in the form of cranial nerve deficits(p=0.56),but the odds ratio(0.6)suggests a less frequent occurrence of complications in the study *** on our experience,the trigger electromyography methodology appears quite promising and req

关键词： Electromyography T-EMG Intraoperative cranial nerve identification Endoscopic endonasal approach Skull base tumor surgery

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Surface alloying of Al films/Ti substrate based on high-current pulsed electron beams irradiation

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Rare Metals 2014年第2期33卷 155-160页

作者： Xian-Xiu Mei Jian-Qiang Fu Xiao-Na Li v.P.Rotshtein N.N.koval Teng-Cai Ma key Laboratory of Materials Modification by Laser Ion and Electron Beams Ministry of Education Dalian University of Technology Institute of High Current Electronics Siberian Branch Russian Academy of Sciences

Ti–Al surface alloy was fabricated using a cyclic pulsed liquid-phase mixing of predeposited 100 nm Al film with a-Ti substrate by low-energy high-current electron beam. Electron probe micro-analysis（EPMA）,grazing incidence X-ray diffraction analysis（GIXRD）,transmission electron microscopy（TEM）, and nanoindentation were used to investigate the characterization of Ti–Al surface alloy. The experimental results show that the thickness of alloy layer is ＊3 lm, and the content of Al in the ＊1 lm thickness surface layer is ＊60 at%. The tetragonal TiAl and TiAl2intermetallics were synthesized at the top surface, which have nanocrystalline *** main phase formed in the ＊2.5 lm thick surface is TiAl, and there are few TiAl2and Ti3Al phase for the *** is enhanced in the alloyed layer. The nanohardness of Ti–Al surface alloy increased significantly compared with a-Ti substrate due to the nanostructure and enhanced dislocation. Since the e-beam remelted repeatedly, the Ti–Al surface alloy mixed sufficiently with Ti substrate. Moreover, there is no obvious boundary between the alloyed layer and substrate.

关键词： Ti–Al surface alloy layer High-current pulse electron beam irradiation Microstructural characterization

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基体脉冲偏压对TiN/Cu纳米复合薄膜组织结构、力学及耐磨性能的影响（英文）

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稀有金属材料与工程 2018年第11期47卷 3284-3288页

作者：赵彦辉赵升升任玲 v.v.Denisov N.N.koval 杨柯于宝海中国科学院金属研究所辽宁沈阳110016 深圳职业技术学院机电工程学院广东深圳518055 俄罗斯科学院西伯利亚分院强流电子研究所俄罗斯托木斯克634055

采用轴向磁场增强电弧离子镀在高速钢基体上沉积了Ti N/Cu纳米复合薄膜,研究了基体脉冲偏压幅值对薄膜成分、结构、力学性能及耐磨性能的影响。结果表明,薄膜中铜含量随着脉冲偏压幅值的增加先增加而后降低,在一个较低的范围内(1.3 at%... 详细信息

采用轴向磁场增强电弧离子镀在高速钢基体上沉积了Ti N/Cu纳米复合薄膜,研究了基体脉冲偏压幅值对薄膜成分、结构、力学性能及耐磨性能的影响。结果表明,薄膜中铜含量随着脉冲偏压幅值的增加先增加而后降低,在一个较低的范围内(1.3 at%～2.1 at%)。X射线衍射结果表明所有的薄膜均出现Ti N相,并未观察到Cu相。薄膜的择优取向随着脉冲偏压幅值的增加而改变。薄膜的最高硬度为36 GPa,是在脉冲偏压幅值为-200 v时得到的,对应了1.6 at%的Cu含量。与纯的Ti N薄膜相比,Cu的添加明显增强了薄膜的耐磨性能。

关键词：电弧离子镀磁场:脉冲偏压显微结构力学性能

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蒙古-鄂霍次克内陆活动带斑岩铜矿化勘查

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地质地球化学 1991年第1期19卷 19-23页

作者： P.v.koval 张锡濂中国矿产经济研究院

在蒙古-鄂霍次克内陆活动带蒙古早中生代岩浆区内发现有斑岩铜矿化。内陆活动带的斑岩铜矿化与碱度较高的安山岩和玄武安山岩的火山活动带有关,该火山活动带围绕正常碱度的钙碱性岩浆作用的内带分布。矿区内的典型岩浆环境包括早期花岗... 详细信息

在蒙古-鄂霍次克内陆活动带蒙古早中生代岩浆区内发现有斑岩铜矿化。内陆活动带的斑岩铜矿化与碱度较高的安山岩和玄武安山岩的火山活动带有关,该火山活动带围绕正常碱度的钙碱性岩浆作用的内带分布。矿区内的典型岩浆环境包括早期花岗闪长岩-花岗岩组合以及构成单独岩浆系的粗玄安山岩-粗安岩组合和斑岩组合。对蒙古中部巴彦-乌拉含矿岩浆系统进行了勘探,该岩浆系统被认为是一个大的层状火山-侵入型弱侵蚀系统,其矿化形成深度为1.5—2km,延伸距离超过500m。热液交代岩系由各种青磐岩、黑云母-石英-钠长石交代岩、石英-绢云母交代岩、石英-电气石交代岩、石英-电气石角砾岩、几乎由单一矿物石英形成的交代岩以及泥质岩组成。含矿岩浆系统伴有指示元素的区域异常(B、Bi、As)和局部异常(Sn、Mo、Cu、Zn、Pb、Ag、Sb等)以及正磁异常和明显的电导异常;指示元素异常在基岩、土壤和河流沉积物中反映出来,正磁异常在隐伏侵入岩钟区显示出来。这些异常和多元素地球化学组合的分布图形与矿田内的交代分带和构造断块的分布一致。指示元素的分带顺序是:(Sn、Mo、Cu)—(Ag、Pb、Zn)—(As、Bi、Sb)。在预测评价阶段,应对古地磁环境(尤其是中心型构造)以及航空磁测、航空放射性测量,构造地质解释和矿化证据进行综?

关键词：铜矿矿床铜矿化勘探斑岩蒙古

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Magnetoelectric coupling at microwave frequencies observed in bismuth ferrite-based multiferroics at room temperature

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Journal of Materials Science & Technology 2023年第6期137卷 100-103页

作者： Man Zhang vladimir koval Yu Shi Yajun Yue Chenglong Jia Jiagang Wu Giuseppe viola Haixue Yan School of Engineering and Materials Science Queen Mary University of LondonMile End RoadLondon E14NSUK Institute of Materials Research Slovak Academy of SciencesWatsonova 47Kosice 04001Slovakia key Laboratory for Magnetism and Magnetic Materials of MOE Lanzhou UniversityLanzhou 730000China Department of Chemistry Queen Mary University of LondonMile End RoadLondon E14NSUK Department of Materials Science Sichuan UniversityChengdu 610064China

***,In the search for advanced multifunctional materials for next generation sensors and logic devices,magnetoelectric multifer-roics exhibiting simultaneously ferromagnetism and ferroelectric-ity within the same phas... 详细信息

关键词： microwave coupling ferroelectric

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volar locking distal radius plates show better short-term results than other treatment options: A prospective randomised controlled trial

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World Journal of Orthopedics 2016年第10期7卷 687-694页

作者： Herwig Drobetz Lidia koval Patrick Weninger Ruth Luscombe Paula Jeffries Stefan Ehrendorfer Clare Heal Orthopaedic Department Mackay Base Hospital James Cook University School of Medicine and Dentistry Orthopaedic Department the Prince Charles Hospital Orthopaedic Hospital Speising Mathematical Science School Queensland University of Technology Orthopaedic Department Kantons Hospital Uri Department of General Practice Mackay Base Hospital James Cook University School of Medicine and Dentistry Anton Breinl Research Centre for Health Systems Strengthening James Cook University

AIM To compare the outcomes of displaced distal radius fractures treated with volar locking plates and with immediate postoperative mobilisation with the outcomes of these fractures treated with modalities that necessitate 6 wk wrist *** A prospective, randomised controlled single-centre trial was conducted with 56 patients who had a displaced radius fracture were randomised to treatment either with a volar locking plate(n = 29), or another treatment modality(n = 27; cast immobilisation with or without wires or external fixator). Outcomes were measured at 12 wk. Functional outcome scores measured were the Patient-Rated Wrist Evaluation(PRWE) Score; Disabilities of the Arm, Shoulder and Hand and activities of daily living(ADLs). Clinical outcomes were wrist range of motion and grip strength. Radiographic parameters were volar inclination and ulnar *** Patients in the volar locking plate group had significantly better PRWE scores, ADL scores, grip strength and range of extension at three months compared with the control group. All radiological parameters were significantly better in the volar locking plate group at 3 mo. CONCLUSION The present study suggests that volar locking plates produced significantly better functional and clinical outcomes at 3 mo compared with other treatment modalities. Anatomical reduction was significantly more likely to be preserved in the plating group. Level of evidence: Ⅱ.

关键词： volar locking distal radius plate Prospective randomised controlled Postoperative mobilisation Distal radius fracture Short-term outcome

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Endoscopic endonasal transclival removal of tumors of the clivus and anterior region of the posterior cranial fossa (results of surgical treatment of 140 patients)

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Chinese Neurosurgical Journal 2018年第4期4卷 219-232页

作者： Alexey N. Shkarubo konstantin v. koval Ilia v. Chernov Dmitry N. Andreev Alexey B. kurnosov Andrey A. Panteleyev Federal State Autonomous Institution N.N. Burdenko National Medical Research Center of Neurosurgery of the Ministry of Health of the Russian Federation (N.N. Burdenko NMRCN) 4-ya Tverskaya-YAmskaya street 16 Moscow Russian Federation

Background: Until recently, tumors of the clivus and the anterior region of the posterior cranial fossa were considered extremely difficult to access and often inoperable using standard transcranial approaches. With the introduction into the neurosurgical practice of minimally invasive methods utilizing endoscopic techniques, it became possible to effectively remove hard-to-reach tumors, including central tumors of the anterior region of the posterior cranial fossa. Methods: From 2008 to the present time, the inpatient institution has operated on 140 patients with various tumors of the base of the skull, localized to the clivus and anterior region of the posterior cranial fossa (65 men and 75 women). The age of patients ranged from 3 to 74 years. Tumor distribution according to the histopathological features was as follows: chordomas, 103 (73.57%);meningiomas, 12 (8.57%);pituitary adenomas, 9 (6.43%);fibrous dysplasia, 4 (2.86%);cholesteatoma, 3 (2.14%);craniopharyngiomas, 2 (1.43%);plasmacytomas, 2 (1.43%);and other tumors (giant cell tumor, neurohypophyseal glioma, osteoma, carcinoid, chondroma), 5 (3.57%). The tumors had the following size distribution: giant (more than 60 mm), 35 (25%);large (35–59 mm), 83 (59.3%);medium (21–35 mm), 21 (15%);and small (less than 20 mm), 1 (0.7%). In 11 cases, intraoperative monitoring of the cranial nerves was performed (21 cranial nerves were identified). Results: Upper, middle, and lower transclival approaches provide access to the anterior surface of the upper, middle, and lower neurovascular complexes of the posterior cranial fossa. The chordoma cases were distributed as follows according to extent of removal: total removal, 68 (66.02%);subtotal removal, 25 (24.27%);and partial removal, 10 (9.71%). The adenomas of the pituitary gland were removed totally in 6 cases, subtotally in 1 case and partially in 2 cases. The meningiomas were removed totally in 1 case, subtotally in 5 cases, and partially in 5 cases, with less than 50

关键词： Clivus Clival chordoma Endoscopic endonasal transclival approach Monitoring of cranial nerves Posterior cranial fossa Skull base anatomy Skull base surgery

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矿产勘查中区域岩石地球化学的作用

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国外地质勘探技术 1986年第2期 41-44页

作者： P.v.koval 杨少平

前言区域岩石地球化学为地球化学研究提供了基础,因此,特殊岩浆杂岩的地球化学特征与其地质背景及其矿床有关。这种方法对成矿作用的研究和找矿也是很重要的。本文中区域岩石地球化学的应用是用于评价与蒙古-鄂霍茨克板块之间活动带有... 详细信息

前言区域岩石地球化学为地球化学研究提供了基础,因此,特殊岩浆杂岩的地球化学特征与其地质背景及其矿床有关。这种方法对成矿作用的研究和找矿也是很重要的。本文中区域岩石地球化学的应用是用于评价与蒙古-鄂霍茨克板块之间活动带有关的中生带岩浆岩省(图1)。通常,与某些更详细的研

关键词：岩石地球化学岩浆花岗岩类中生代花岗岩蒙古人民共和国稀有金属矿黑云母成矿带矿化带发射光谱定量分析中生代岩浆岩杂岩矿产勘查

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Change of oxide ceramics microhardness under action of high current pulsed beamof lowenergy electrons

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广东有色金属学报 2005年第2期15卷 129-131页

作者： Surzhikov A.P. Frangulyan T.S. Ghyngazov S.A. koval N.N. Devyatkov v.N. Tomsk Polytechnic University TomaskRussia Institute of High Current Electronics TomskRussia

The main point of the process of impact of a high-current pulsed beam for low-energy electrons (HPBLE) is that a kinetic energy of accelerated particles turns into a thermal energy.

关键词：陶瓷氧化物显微硬度电子机械性能

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聚酰亚胺薄膜热膨胀系数的不稳定性研究

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绝缘材料 2005年第2期38卷 34-35,38页

作者：王晓燕耿洪滨何世禹刘勇 Yu O Pokhyl k.v.koval 哈尔滨工业大学黑龙江哈尔滨150001 乌克兰低温物理研究所特种技术设计局乌克兰哈尔克夫61103

测量了聚酰亚胺薄膜在冷热循环过程中各温度点的热膨胀系数。结果表明:聚酰亚胺薄膜的热膨胀系数具有不稳定性。

关键词：聚酰亚胺薄膜热膨胀系数热循环

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