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9. A preliminary study on the efficacy of anticoagulants combined with endovascular treatment for subacute and chronic cerebral venous sinus thrombosis assisted by high resolution magnetic resonance black⁃blood thrombus imaging

Author

WANG Wei, FAN Yi⁃mu, JIA Qiang, LI Xu⁃dong, WANG Shi⁃bo, and TONG Xiao⁃guang

Subjects
sinus thrombosis, intracranial, cerebral veins, magnetic resonance imaging, anticoagulants, mechanical thrombolysis, Neurology. Diseases of the nervous system, RC346-429
Abstract

Objective To investigate the efficacy and safety of combined anticoagulants with endovascular treatment for subacute and chronic cerebral venous sinus thrombosis (CVST) under the assistance of high resolution magnetic resonance black⁃blood thrombus imaging (MRBTI). Methods and Results A retrospective study was performed on the patients with CVST who were treated at Department of Neurosurgery of Tianjin Huanhu Hospital from January 2019 to January 2021. Preoperative high resolution MRBTI confirmed 15 patients with subacute and chronic CVST, and endovascular treatment was performed on the basis of systemic anticoagulant therapy. The results showed that 10 cases were in subacute stage and 5 cases were in chronic stage. After treatment, the venous sinus was completely recanalized in 4 cases and partially recanalized in 11 cases. Complications occurred in 2 cases (intracranial hematoma enlarged in one case, microguide wire penetrated straight sinus wall during surgery in one case), contact thrombolytic therapy was continued after the condition stabilized. The mean indwelling time of microcatheter in straight sinus was (6.27 ± 0.21) d and the mean length of hospital stay was (11.53 ± 1.30) d. The degree of impairment of consciousness [Glasgow Coma Scale (GCS) score] was improved at discharge [at discharge (13.67 ± 2.02) score vs. at admission (11.67 ± 2.13) score; t = 9.165, P = 0.000], the degree of neurological impairment [modified Rankin Scale (mRS) score] was improved 6 months after surgery [at 6 months after surgery 1 (0, 2) score vs. at admission 3 (2, 4) score; Z = ⁃ 3.624, P = 0.000]. Conclusions High resolution MRBTI is an effective technique to identify subacute and chronic CVST patients. For these patients, the combination of systemic anticoagulation and endovascular treatment can reduce venous sinus thrombosis load and improve symptoms in a short time, which is a safe, effective and preferred treatment.

Published
2022
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38. EDM machining quality control and parameters optimization

Author

Ren Dalin, Xiao Hanjie, and Wang Shi-bo

Subjects
0209 industrial biotechnology, Engineering, Emulation, business.product_category, business.industry, Mechanical Engineering, media_common.quotation_subject, Control (management), Mechanical engineering, 02 engineering and technology, 021001 nanoscience & nanotechnology, Industrial and Manufacturing Engineering, Computer Science Applications, Functional relation, Machine tool, 020901 industrial engineering & automation, Electrical discharge machining, Machining, Control and Systems Engineering, Ansys software, Quality (business), 0210 nano-technology, business, Software, media_common
Abstract

A rational determination of machining parameters of electrical discharge machining (EDM) is of vital importance to the machining quality. This paper proposes an ANSYS emulation, experimental correction, and numerical fitting method (AEN-XRD method) to determine the relationship between machining parameters and machining indicators of various kinds of machine tools. Firstly, it adopts ANSYS software to make simulation researches of the pit size with different electrical parameters. Theoretical calculation of corresponding machining indicators is presented. Based on the machine data, adjustment is made on the simulation outcome. And thereby, based on the adjusted outcome, numerical fitting method is adopted to determine the functional relation formula of machining parameters and machining indicators. Experiments of different machine tools have shown that there is a relatively high prediction accuracy of machining parameters and they are capable to meet the actual machining demand, which further proves the AEN-XRD method is of great practicability.

Published
2016

45. User Behavior Research of Information Security Technology Based on TAM

Author

Wang Cheng and Wang Shi-bo

Subjects
Engineering, External variable, Knowledge management, General Computer Science, business.industry, Correlation analysis, Social impact, Regression analysis, Information security, Cognitive cost, business, Reliability (statistics)
Abstract

By analyzing the present applying situation and influential factors of the information security technology, considering technological utility, cognitive cost, social impact, individual innovation, computer self-efficacy and other external variables, this paper constructs a model of user behavior of information security technology based on TAM. Through questionnaire to collect data and SPSS to perform reliability analysis, validity analysis, correlation analysis and regression analysis, the model in this paper is verified to be effective. Finally, some relative recommendations for the development of Chinese information security technology are put forward.

Published
2014

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