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Delayed neurological dysfunction following posterior laminectomy with lateral mass screw fixation:A case report and review of literature

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World Journal of Clinical Cases 2024年第7期12卷 1356-1364页

作者： Rui-Zhong Yan Chao Chen Chu-Ran lin Yan-Hui Wei Zhi-Jian Guo Ya-Kun Li Quan Zhang He-Yi Shen hao-lin sun Department of Orthopedics Taiyuan Central HospitalTaiyuan 030009Shanxi ProvinceChina Department of Orthopedics Graduate School Shanxi University of Traditional Chinese MedicineTaiyuan 030024Shanxi ProvinceChina Department of Orthopedics Peking University First HospitalBeijing 100034China

BACKGROUND While most complications of cervical surgery are reversible,some,such as symptomatic postoperative spinal epidural hematoma(SEH),which generally occurs within 24 h,are associated with increased morbidity and *** neurological dysfunction is diagnosed in cases when symptoms present>3 d *** to its rarity,the risk factors for delayed neurological dysfunction are ***,this condition can result in irreversible neurological deficits and serious *** this paper,we present a case of postoperative SEH that developed three days after hematoma *** SUMMARY A 68-year-old man with an American Spinal Injury Association(ASIA)grade C injury was admitted to our hospital with neck pain and tetraplegia following a *** C3-C7 posterior laminectomy and the lateral mass screw fixation surgery were performed on the tenth ***,the patient showed no changes in muscle strength or ASIA *** patient experienced neck pain and subcutaneous swelling on the third day postoperatively,his muscle strength decreased,and his ASIA score was grade *** resonance imaging showed hypointense signals on T1 weighted image(T1WI)and T2WI located behind the epidural space,with spinal cord *** surgical intervention for the hematoma was performed 12 h after *** hypoproteinemia and pleural effusion did not improve in the perioperative period,the patient recovered to ASIA grade C on day 30 after surgery,and was transferred to a functional rehabilitation exercise *** This case shows that amelioration of low blood albumin and pleural effusion is an important aspect of the perioperative management of cervical *** to relieve the pressure on the spinal cord should be performed as soon as possible to decrease neurological disabilities.

关键词： Delayed postoperative spinal epidural hematoma Complications Spinal surgery Hypoproteinemia Risk factor Case report

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Acute deep venous thrombosis induced by May-Thurner syndrome after spondylolisthesis surgery:A case report and review of literature

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World Journal of Clinical Cases 2021年第25期9卷 7490-7497页

作者： Lei Yue hao-Yong Fu hao-lin sun Department of Orthopedics Peking University First HospitalBeijing 100034China

BACKGROUND Deep venous thrombosis(DVT)is a serious complication of lumbar spine *** guidelines recommend pharmacomechanical prophylaxis for patients at high risk of DVT after spine ***-Thurner syndrome(MTS),a venous anatomical variation that may require invasive intervention,is an often overlooked cause of *** date,no case reports of symptomatic MTS caused by isthmic spondylolisthesis or subsequent acute DVT after posterior lumbar surgery have been *** SUMMARY We here present a case of a patient who developed acute DVT 4 h after spondylolisthesis surgery,and MTS was only considered after surgery,during a review of a gynecological enhanced computed tomography image taken before the *** In conclusion,clinicians should consider MTS in the presence of a dangerous triad:spondylolisthesis,elevated D-dimer levels,and sonographically indicated unilateral deep vein *** with a vascular surgeon is also essential to MTS management.

关键词： Spondylolisthesis Spine surgery Deep venous thrombosis May-Thurner syndrome Complication Case report

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Low-intensity extracorporeal shock wave therapy for midshaft clavicular delayed union: A case report and review of literature

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World Journal of Clinical Cases 2021年第27期9卷 8242-8248页

作者： Lei Yue hao Chen Tian-hao Feng Rui Wang hao-lin sun Department of Orthopaedics Peking University First HospitalBeijing 100034China Department of Rehabilitation Peking University First HospitalBeijing 100034China

BACKGROUND One of the most common complications following surgery for midshaft clavicle fracture is nonunion/delayed *** shock wave therapy(ESWT)is an alternative to promote new bone formation without surgical *** date,no literature has reported low-intensity ESWT(LI-ESWT)in delayed union of midshaft clavicle *** SUMMARY We reported a 66-year-old Chinese amateur cyclist with clavicle delayed union treated with 10 sessions of LI-ESWT(radial,0.057 mJ/mm^(2),3 Hz,3000 shocks).No anesthetics were applied,and no side effects *** the 4 mo and 7 mo follow-ups,the patient achieved clinical and radiographical recovery,*** In conclusion,our findings indicated that LI-ESWT could be a good option for treating midshaft clavicular delayed union.

关键词： Shockwave therapy Clavicle fracture Delayed union Extracorporeal shock wave therapy Case report

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A new type of anionic surfactant with four carboxylates for the preparation of mesoporous materials

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Frontiers of Materials Science 2012年第3期6卷 268-277页

作者： lin-hao sun Song WANG Wei-lin SHI Shuming ZHANG Xi CHEN Qiang CAI Department of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Department of Materials Science and Engineering WhitingSchoolof EngineeringJohns Hopkins University3400 N.Charles St.BaltimoreMD 21218USA

In this paper, a new type of anionic surfactant containing four carboxylates was synthesized by a four-step synthetic reaction including bromination reaction and primary amide protective reaction. Intermediates and final products of each step in the whole synthetic process were characterized by IH NMR and MS. Purification of the anionic surfactant was accomplished through combination of recrystallization and silica gel column chromatography. The structure and the critical micelle concentration （CMC） of this surfactant at different temperatures were also investigated. Unlike traditional mono- carboxylate surfactant easy to form lamellar mesostructure, this surfactant has the hexagonal mesophase structure and comparatively low CMC, *** to be applied in the preparation of mesoporous metal oxides.

关键词： surfactant four carboxylates hexagonal mesosphase critical micelleconcentration (CMC)

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Thoracolumbar surgery for degenerative spine diseases complicated with tethered cord syndrome:A case report

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World Journal of Clinical Cases 2022年第28期10卷 10375-10383页

作者： Yue-Tian Wang Guan-Zhang Mu hao-lin sun Department of Orthopedics Peking University First HospitalBeijing 100034China

BACKGROUND Tethered cord syndrome(TCS) secondary to split cord malformation(SCM) is rare in *** is as yet no consensus about the optimal treatment method for adult patients with SCMs and degenerative spine diseases such as lumbar stenosis,spondylolisthesis and ossification of the ligamentum flavum(OLF).The tethered cord poses a great challenge to the decompression and fusion procedures for the intraoperative stretching of the spinal cord,which might lead to deteriorated neural ***,we report on a case to add our treatment experience to the medical *** SUMMARY We treated a 67-year-old female patient with type II SCM suffering from lumbar disc herniation,degenerative lumbar spondylolisthesis and thoracic *** patient underwent thoracolumbar spinal fusion and decompression surgery for severe lower back pain,extensive left lower limb muscle weakness and intermittent *** the thoracolumbar surgery,without stretching the tethered cord,the patient achieved complete relief of pain and lower extremity weakness at final *** For adult patients with underlying TCS secondary to SCM coupled with thoracic OLF and lumbar spondylolisthesis,a thoracolumbar fusion surgery could be safe and effective with the tethered cord *** is critical to design individualized surgical protocols to reduce the stretch of the low-lying spinal cord.

关键词： Tethered cord syndrome Split cord malformations Ossification of ligamentum flavum Spondylolisthesis Thoracolumbar surgery Case report

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Synthesis of novel thiol-functionalized mesoporous silica nanorods and their sorbent properties on heavy metals

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Frontiers of Materials Science 2012年第3期6卷 278-282页

作者： Xi CHEN Qiang CAI lin-hao sun Wei ZHANG Xing-Yu JIANG Department of Materials Science and Engineering Tsinghua UniversityBeijing 100084China National Center for Nanoscience and Technology Beijing 100190China

Novel thiol-functionalized mesoporous silica nanorods （MSNRs） were synthesized through a base co-condensation method, in which two organoalkoxysilanes, tetraethoxylsilane （TEOS） and bis[3-（triethoxysilyl）propyl]tetrasulfide （TESPT）, were used as silica precursors simultaneously. TESPT was firstly used for both morphology control and inner surface functionalization of mesoporous silica hybrid materials. The micro- structures as well as porous character of the MSNRs were characterized by means of SEM, XRD, TEM and N2 sorption measurements. Infrared spectrum analysis and heavy metal ions （Ag＋ and Cd2＋） adsorption measurements were carried out to confirm the functionalized framework of MSNRs.

关键词： nanocomposite porous material morphology control inner surfacefunctionalization sorbent

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Parallel Computing Based Solution for Reliability-constrained Distribution Network Planning

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1147-1158页

作者： Yaqi sun Wenchuan Wu Yi lin Hai Huang hao Chen State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Sichuan Energy Internet Research Institute Tsinghua UniversityChengduChina State Grid Fujian Electric Power Co.Ltd. FuzhouChina

The main goal of distribution network(DN)expan-sion planning is essentially to achieve minimal investment con-strained by specified reliability *** reliability-constrained distribution network planning(RcDNP)problem can be cast as an instance of mixed-integer linear programming(MILP)which involves ultra-heavy computation burden espe-cially for large-scale *** this paper,we propose a parallel computing based solution method for the RcDNP *** RcDNP is decomposed into a backbone grid and several lateral grid problems with ***,a parallelizable aug-mented Lagrangian algorithm with acceleration method is devel-oped to solve the coordination planning *** lateral grid problems are solved in parallel through coordinating with the backbone grid planning ***-Seidel iteration is adopted on the subset of the convex hull of the feasible region constructed by *** mild conditions,the opti-mality and convergence of the proposed method are *** tests show that the proposed method can significant-ly reduce the solution time and make the RcDNP applicable for real-worldproblems.

关键词： Distribution network expansion planning reliability parallel computing

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Radiological and clinical outcomes of midline lumbar fusion on sagittal lumbar-pelvic parameters for degenerative lumbar diseases

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World Journal of Clinical Cases 2022年第35期10卷 12880-12889页

作者： Yue-Tian Wang Bing-Xu Li Shi-Jun Wang Chun-De Li hao-lin sun Department of Orthopedics Peking University First HospitalBeijing 100034China

BACKGROUND Improving the sagittal lumbar-pelvic parameters after fusion surgery is important for improving clinical *** impact of midline lumbar fusion(MIDLF)on sagittal lumbar-pelvic alignment for the management of degenerative lumbar diseases is still *** To analyze the effects of short-segment MIDLF and minimally invasive transforaminal lumbar interbody fusion(MIS-TLIF)on sagittal lumbar-pelvic *** We retrospectively analyzed 63 patients with degenerative lumbar diseases who underwent single-segment MIDLF or *** imaging data of patients were collected before surgery and at the final *** radiological sagittal parameters included the lumbar lordosis(LL),lower LL,L4 slope(L4S),L5 slope(L5S),L5 incidence(L5I),L1 axis and S1 distance(LASD),pelvic incidence(PI),pelvic tilt(PT),sacral slope(SS),and PI-LL mismatch(PI-LL).Additionally,the clinical outcomes,including lower back and leg pain visual analog scale(VAS)and Oswestry disability index(ODI)scores,were also *** In both groups,LL and Lower LL significantly increased,while L5I and LASD significantly decreased at the final follow-up compared to that recorded prior to operation(P0.05).However,the PI-LL in both groups was significantly reduced compared to that recorded prior to operation(P0.05).In addition,the change in sagittal lumbar-pelvic parameters did not differ significantly,except forΔLASD withi

关键词： Minimally invasive Interbody fusion Cortical bone trajectory Sagittal lumbar-pelvic parameters

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A game-theoretic approach for federated learning:A trade-off among privacy,accuracy and energy

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Digital Communications and Networks 2024年第2期10卷 389-403页

作者： Lihua Yin Sixin lin Zhe sun Ran Li Yuanyuan He Zhiqiang hao Cyberspace Institute of Advanced Technology Guangzhou UniversityGuangzhou510006China School of Cyber Science and Engineering Huazhong University of Science and TechnologyWuhan430074China China Industrial Control Systems Cyber Emergency Response Team Beijing100040China

Benefiting from the development of Federated Learning(FL)and distributed communication systems,large-scale intelligent applications become *** devices not only provide adequate training data,but also cause privacy leakage and energy *** to optimize the energy consumption in distributed communication systems,while ensuring the privacy of users and model accuracy,has become an urgent *** this paper,we define the FL as a 3-layer architecture including users,agents and *** order to find a balance among model training accuracy,privacy-preserving effect,and energy consumption,we design the training process of FL as game *** use an extensive game tree to analyze the key elements that influence the players’decisions in the single game,and then find the incentive mechanism that meet the social norms through the repeated *** experimental results show that the Nash equilibrium we obtained satisfies the laws of reality,and the proposed incentive mechanism can also promote users to submit high-quality data in *** the multiple rounds of play,the incentive mechanism can help all players find the optimal strategies for energy,privacy,and accuracy of FL in distributed communication systems.

关键词： Federated learning Privacy preservation Energy optimization Game theory Distributed communication systems

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A reduced combustion mechanism of ammonia/diesel optimized with multi-objective genetic algorithm

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Defence Technology（防务技术） 2024年第4期34卷 187-200页

作者： Wanchen sun Shaodian lin hao Zhang Liang Guo Wenpeng Zeng Genan Zhu Mengqi Jiang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025China

For the deep understanding on combustion of ammonia/diesel,this study develops a reduced mechanism of ammonia/diesel with 227 species and 937 *** sub-mechanism on ammonia/interactions of N-based and C-based species(N—C)/NOx is optimized using the Non-dominated Sorting Genetic Algorithm II(NSGA-II)with 200 *** optimized mechanism(named as 937b)is validated against combustion characteristics of ammonia/methane(which is used to examine the accuracy of N—C interactions)and ammonia/diesel *** ignition delay times(IDTs),the laminar flame speeds and most of key intermediate species during the combustion of ammonia/methane blends can be accurately simulated by 937b under a wide range of *** for ammonia/diesel blends with various diesel energy fractions,reasonable predictions on the IDTs under pressures from 1.0 MPa to5.0 MPa as well as the laminar flame speeds are also achieved by *** particular,with regard to the IDT simulations of ammonia/diesel blends,937b makes progress in both aspects of overall accuracy and computational efficiency,compared to a detailed ammonia/diesel *** kinetic analysis reveals that the reaction pathway of ammonia during the combustion of ammonia/diesel blend mainly differs in the tendencies of oxygen additions to NH_2 and NH with different equivalence ratios.

关键词： Ammonia Diesel Combustion Kinetic mechanism Multi-objective optimization

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