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Open Journal of Anesthesiology 2015年第1期5卷 7-12页

作者： Piacherski Valery marachkou aliaksei Department of Anesthesiology and Intensive Care Health Care Institution “Mogilev Regional Hospital” Mogilev Republic of Belarus

Background: The aim of the study is to determine the effect of a reduction in dose of local anesthetic blockade on the development of the sciatic nerve. Methods: Forty blocks of sciatic nerve were used in a double-blind randomized research, under ultrasonic guidance, using an electric stimulator with the peripheral nerves. Forty patients were divided into 2 equal groups. In the first group, a sciatic nerve block was performed with 5 ml of 0.75% ropivacaine solution (37.5 mg);in the second group, 10 ml of 0.75% ropivacaine solution (75 mg) was used. The assessment of the time required for developing sensory and motor blocks was carried out from the beginning of local anesthetic solution injection in the fascial sheath of the sciatic nerve. Results: Demographic data of patients were identical in the two sample groups. The time required for achieving a complete sensory block in groups treated with 5 and 10 ml ropivacaine was 45 (40;48) and 30 (28;30) min, respectively, (р 0.05. Conclusions: Complete blockade of the sciatic nerve is developed using 5 ml of 0.75% ropivacaine. Reducing the dose of ropivacaine prolongs the latent period of the LA during the blockade of the sciatic nerve. Time of postoperative analgesia was not significantly changed.

关键词： Ropivacaine Sciatic Nerve Ultrasound Guidance

Features and Principles the Spread of Local Anesthetic Blockade of the Sciatic Nerve at Depends on the Amount of Anesthetic

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Open Journal of Anesthesiology 2014年第2期4卷 31-35页

作者： Piacherski Valery marachkou aliaksei Health Care Institution Mogilev Regional Hospital Mogilev The Republic of Belarus

Aim: To study the features of local anesthetic solution spreading during sciatic nerve block in dependence on the anesthetic solution volume. Material and Methods: One hundred and sixty nine cases of sciatic nerve blocks done under ultrasonic visualization control were analyzed. Sciatic nerve blocks were performed by lidocaine in volumes 30;25;20;15;12.5;10;7.5;6.5;5;4.5 ml. The cross-section area, equal to local anesthetic spreading, was determined;the extension of the anesthetic solution spreading along sciatic nerve was calculated. Results: The anesthetic agent solution spreads along sciatic nerve in proximal and distal direction, forming a kind of cylinder. The minimum volume of the local anesthetic, which covers sciatic nerve in the whole, is 5 ml. A rare (1.77%) variation of sciatic nerve structure was described, in which tibial and common peroneal nerves develop directly from the branches of sacral plexus. Conclusion: The decrease of the local anesthetic volume leads to reduction of its spreading distance and cross-section area. Ultrasonic visualization can provide for sciatic nerve anatomical peculiarities, which can have an effect on the block quality.

关键词： Sciatic Nerve Block Ultrasound-Guided Local Anesthetic Spreading

Comparison of Time Development of the Sciatic Nerve Blockade Performed with 1% Lidocaine Subgluteal and Popliteal Approach under Ultrasound Guidance

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Open Journal of Anesthesiology 2014年第12期4卷 324-331页

作者： Piacherski Valery marachkou aliaksei Brukhnou Andrei Zakhar Kokhan Department of Anesthesiology and Intensive Care Health Care Institution “Mogilev Regional Hospital” Mogilev Republic of Belarus

The existing researches in the field of regional anesthesia of the sciatic nerve show that if popliteal sciatic nerve blockade is performed, the time of the development of the sciatic nerve anesthesia is longer in comparison with subgluteal sciatic nerve blockade. Background: The aim of the research is to compare the time of the development of the sciatic nerve blockade performed with 1% lidocaine with epinephrine (1:200,000) in subgluteal and popliteal areas under ultrasound guidance. Materials and Methods: Patients were divided into two groups. In Group A (20 patients), the subgluteal approach to block the sciatic nerve was taken;in Group B (20 patients), the popliteal approach was applied. All blockades of the sciatic nerve were performed with 1% lidocaine (30 ml of lidocaine with epinephrine (1:200,000)) and electrical stimulation of peripheral nerves under ultrasound guidance. We measured the time of the development of sensory and motor blocks. Results: In Group A, the sciatic nerve sensory block developed in 15 (14 - 16) minutes, a complete motor block developed in 15.5 (15 - 17) minutes. In Group B the sciatic nerve sensory block developed in 40 (38.5 - 42.5) minutes while a complete motor block did not develop in any patient. Conclusion: When the sciatic nerve is blocked in subgluteal area with 30 ml of 1% lidocaine with epinephrine (1:200,000) under ultrasound guidance, sensory blocks develop faster than during the popliteal blockade: 15 (14 - 16) minutes vs. 40 (38.5 - 42.5) minutes respectively. The opportunity to define the place of the introduction of local anesthetic in our research is limited.

关键词： Blockade of the Sciatic Nerve Lidocaine Subgluteal Approach Popliteal Approach Ultrasound Guidance

Effect of open ultraviolet germicidal irradiation lamps on functionality of excimer lasers used in cornea surgery

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International Journal of Ophthalmology(English edition) 2017年第9期10卷 1474-1476页

作者： Jaroslavas Belovickis aliaksei Kurylenka Vadim Murashko Vilnius University Sauletekio 3Vilnius 10222Lithuania Novoe Zrenie Klumova 5aMinsk 220009Belarus

We report on the impact of direct ultraviolet germicidal irradiation（UVGI）on reflective optics,used in the excimer laser system Allegretto *** aim of our work was to confirm our hypothesis based on long-rate observations of obtained anomalies in post-operative results that are attributed to degradation of reflective optics upon ultraviolet *** presence of direct UVGI coupled with humidity in the operating environment caused merging anomalies and unwanted post-operative correction ***-A radiation caused a similar effect on the reflective cover of the mirrors.

关键词： ultraviolet radiation excimer lasers post-operative anomalies laser-assisted in situ keratomileusis mirror degradation

Cyber Power as A Part of Smart Power Strategy in Conflict Resolution

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Cyber Power as A Part of Smart Power Strategy in Conflict Re...

作者： aliaksei Hapeyeu 山东大学

学位级别：硕士

The modern science of world politics has repeatedly addressed the problems of changing the environment of international *** topic has been touched upon in the works of such scientists as Joseph Nye,Robert Cohen,Stephen Krasner,Bjorn Hethne,Michael ***,a number of important questions have not yet been answered:how does the change in the environment of international relations correlate with the role and influence of the state today?What resources and mechanisms can we use to ensure a "managed impact" on the transformation of maintenance of existing conflicts today?Do we have any alternatives?What difficulties will we have to face and what criteria should we follow in conflict resolution?What is effectiveness in foreign policy?The definition of "smart force" is now widely used in the study of global political trends and the prediction of future developments in political *** new interpretation of "smart power" is regarded as an extension of the original definition（a series of numerous domestic and foreign policy instruments based on their effect on international public and expert consciousness）,with the analytical dimension becoming increasingly *** information technology has a huge influence on control,cyberspace is a modern and rapidly evolving technological *** characteristics of cyber domain mitigate certain power imbalances between actors and serve as a good example of the power changes that have characterized global politics this *** a result,the existing system of conflict resolution turns out to be insufficient for resolving international conflicts:modern institutions are deprived of power and,therefore,cannot use new methods of conflict *** is not an anomaly in international relations,but one of the forms of interaction between actors,during which the political picture of the world is updated and modernized.

关键词： Smart Power Cyber power conflict management

Pressure of Local Anesthetic Solution While Performing Sciatic Nerve Blockade in Human Subgluteal Area

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Open Journal of Anesthesiology 2014年第11期4卷 276-280页

作者： Zakhar Kokhan Andrei Brukhnou aliaksei Marochkov Valery Piacherski Department of Anaesthesiology and Intensive Care Mogilev Regional Hospital Mogilev Republic of Belarus

Intraneural introduction of local anesthetic belongs to the existing complications of peripheral nerves blockades. The damage of peripheral nerves is associated with the damaging effect of the injection needle and with the pressure caused by the introduction of local anesthetic. Purpose: Determine the pressure of the local anesthetic in fascial compartment of the sciatic nerve during his administration in the blockade of the sciatic nerve subgluteal access. Materials and Methods: Submitted blockade of the sciatic nerve subgluteal access in 22 patients with peripheral nerve electrostimulation under ultrasound guidance. To measure interstitial pressure system was used with the inclusion of a probe invasive blood pressure. Results: During the introduction of 1 ml in the fascial compartment of the sciatic nerve, the pressure of 0.77 psi (40 mmHg) was registered. In the course of the further introduction of local anesthetic up to 13 ml, the pressure did not alter validly (p > 0.05) and its average was 40 (35;45) mmHg or 0.77 (0.68;0.87) psi. This is the first study that has allowed to determine the pressure of local anesthetic in the fascial compartment of the sciatic nerve at the time of its introduction, the blockade of the sciatic nerve subgluteal access for the first time determined the probable maximum pressure intraneural injection of local anesthetic. The disadvantage of this study is that it is impossible to measure the pressure of administration over 5.8 psi (300 mmHg), and the lack of opportunity to assess the intraneural blood flow in the sciatic nerve during the creation of such pressure.

关键词： Peripheral Blockade Sciatic Nerve Pressure of the Local Anestnetiс Ultrasound Guidance

Comparison of Three Methods of Regional Anesthesia of Peripheral Nerves and Plexuses

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Open Journal of Anesthesiology 2012年第5期2卷 237-243页

作者： Valery Piacherski aliaksei Marochkov Andrei Brukhnou Zakhar Kokhan Department of Anaesthesiology and Intensive Care Mogilev Regional Hospital Mogilev Republic of Belarus.

Aim: There were acquitted 1105 nerve blocks on 762 patients by means of three methods of peripheral nerves and plexuses identification to compare the safety and efficiency of the methods of regional anesthesia. Methods: Depending on the technique of carrying out the peripheral nerve blocks, patients were divided into 3 groups. 1st group: the identification of the correct placement of the injection needle was done by eliciting paresthesia (572 blocks were performed on 395 patients);2nd group: an electrical nerve stimulator was used to locate the nerve (164 blocks on 110 patients);3rd group: the location of the nerve was identified using ultrasonic visual guidance (369 blocks on 257 patients). Results and Conclusion: In 1st group 8 (1.4%) accidental intravascular injections of local anesthetic, 1 case of Horner syndrome (0.17%), 1 case of phrenical nerve were registered. In 17 cases there were performed other methods of anesthesia by reason of inefficiency of the block. In 2nd group 1 case (0.61%) of intravascular injection was noticed. The block was ineffective in single case. There was no complication received in the 3rd group. All the blocks were effective.

关键词： Regional Anesthesia Ultrasound-Guided Efficacy Complications

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双连杆机械臂动力学参数估计模型

科技资讯 2015年第13期13卷 248-250页

作者： ZHUKAU aliaksei 兰州交通大学甘肃兰州730030

该文描述了出现在双连杆机械臂动态参数模型中的问题,并对其性能进行了评估。创建了机械臂的运动模型,连接在绝对空间中链接位移与夹持器中心位置,解决了链接位置的正向运动问题。同时得到一组非线性函数,建立了机械臂的广义坐标和笛卡... 详细信息

该文描述了出现在双连杆机械臂动态参数模型中的问题,并对其性能进行了评估。创建了机械臂的运动模型,连接在绝对空间中链接位移与夹持器中心位置,解决了链接位置的正向运动问题。同时得到一组非线性函数,建立了机械臂的广义坐标和笛卡尔坐标之间的连接。使用Denavit-Hartenberg方法对运动链进行编码。作为解决逆运动学问题的结果,获得一个给定的位置和夹持器输出链路方向的广义坐标方程系统。在数学软件MATLAB(Simulink)中分析得到系统动力学的模型。该文的结论通过数学实验进行证实。

关键词：双连杆机械臂运动链动态模型

Evaluation of EEG β2/θ -ratio and channel locations in measuring anesthesia depth

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Journal of Biomedical Science and Engineering 2010年第1期3卷 39-46页

作者： Zhi-Bin Tan Le-Yi Wang George McKelvey aliaksei Pustavoitau Guang-Xiang Yu Harold Michael Marsh Hong Wang 不详

In this paper, the ratio of powers in the frequency bands of β2 and θ waves in EEG signals (termed as the β2/θ -ratio) was introduced as a potential enhancement in measuring anesthesia depth. The β2/θ -ratio was compared to the relative β-ratio which had been commercially used in the BIS monitor. Sensitivity and reliability of the β2/θ -ratio and EEG measurement locations were analyzed for their effectiveness in measuring anesthesia depth during different stages of propofol induced anesthesia (awake, induction, maintenance, and emergence). The analysis indicated that 1) the relative β -ratio and β2/θ-ratio derived from the prefrontal, frontal, and the central cortex EEG signals were of substantial sensitivity for capturing anesthesia depth changes. 2) Certain channel positions in the frontal part of the cortex, such as , had the combined benefits of substantial sensitivity and noise resistance. 3) The β2/θ-ratio captured the initial excitation, while the relative β -ratio did not. 4) In the maintenance and emergence stages, the β2/θ -ratio showed improved reliability. Implications: The ratio of powers in EEG frequency bands and derived from the frontal cortex EEG channels has combined benefits of substantial sensitivity and noise resistance in measuring anesthesia depth.

关键词： Anesthesia Depth EEG (Electroencephalogram) EEG Channels β2/θ -Ratio Relative β-Ratio

Comparison of Three Methods of Regional Anesthesia of Peripheral Nerves and Plexuses

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