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新乡市部分介入放射工作人员眼晶状体剂量和年有效剂量分析

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中华放射医学与防护杂志 2024年第3期44卷 216-222页

作者：毛喻萱张冰洁刘玉龙王轩刘彤桢贾天合赵风玲孙全富王电辉新乡市职业病防治研究所新乡453000 苏州大学附属第二医院苏州215004 河南省职业病防治研究院郑州450052 中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室北京100088 新乡市卫生健康委员会新乡453000

目的分析2020—2022年新乡市部分医院介入放射工作人员眼晶状体剂量和年有效剂量水平,掌握介入放射工作人员眼晶状体剂量和年有效剂量水平现状。方法通过热释光剂量测量技术,采用整群随机抽样原则,2020—2022年连续3年对新乡市6家医院... 详细信息

目的分析2020—2022年新乡市部分医院介入放射工作人员眼晶状体剂量和年有效剂量水平,掌握介入放射工作人员眼晶状体剂量和年有效剂量水平现状。方法通过热释光剂量测量技术,采用整群随机抽样原则,2020—2022年连续3年对新乡市6家医院的介入放射工作人员进行眼晶状体剂量Hp(3)和年有效剂量Hp(10)测定,分析各年度不同医院级别、不同科室介入放射工作人员眼晶状体剂量和年有效剂量水平。结果3年累计有效监测117人次,眼晶状体年当量剂量左眼为0.12~164.24 mSv、右眼为0.07~51.64 mSv,3年累计人均年当量剂量左眼8.56 mSv、右眼4.49 mSv,左、右眼年当量剂量分布在探测下限(MDL)~5 mSv范围内的比例分别为60.68%、73.50%,有9.41%(11人次)的介入工作人员左眼晶状体年当量剂量超过20 mSv;年有效剂量范围为0.11~31.27 mSv,3年累计人均年有效剂量为2.56 mSv,年有效剂量主要分布在MDL~1.25 mSv的比例为52.14%,有2.56%的介入工作人员年有效剂量超过20 mSv;3年累计人均左、右眼晶状体剂量和年有效剂量三级医院与二级医院相比,差异无统计学意义(P>0.05);3年累计人均剂量不同科室相比,差异均具有统计学意义(H=11.42、13.72、25.94,P<0.05),其中神经内科眼晶状体剂量及年有效剂量低于心内科和综合介入科(Z心内科=-3.33、-3.78、-4.83,P<0.05;Z综合介入科=-2.71、-2.63、-4.39,P<0.05)。结论新乡市介入放射工作工作人员眼晶状体年当量剂量和年有效剂量大部分符合国家限值标准,但有部分人员剂量较高且有超出国家限值的现象;提示在常规监测年有效剂量的同时加强介入放射工作人员眼晶状体常规、连续性的剂量监测,关注二级医院介入放射工作人员眼晶状体及年有效剂量,提高防护意识。

关键词：介入放射工作人员眼晶状体年有效剂量

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湖北某高镁磷尾矿正浮选回收镁试验研究

广东化工 2024年第14期51卷 29-32页

作者：罗阳李洪强陆泽通毛雨轩刘丹章赵梦燕武汉工程大学湖北武汉430074

本文以湖北某高镁磷尾矿为研究对象,采用正浮选开路工艺进行浮选回收白云石试验,考察了磨矿细度,抑制剂、调整剂、捕收剂用量,加药顺序,分段浮选对浮选效果的影响。试验结果表明:通过一段粗选五段精选,最终得到MgO品位为20.15%,回收率为... 详细信息

本文以湖北某高镁磷尾矿为研究对象,采用正浮选开路工艺进行浮选回收白云石试验,考察了磨矿细度,抑制剂、调整剂、捕收剂用量,加药顺序,分段浮选对浮选效果的影响。试验结果表明:通过一段粗选五段精选,最终得到MgO品位为20.15%,回收率为48.92%的镁精矿,获得较好的浮选指标,为高镁磷尾矿的回收利用提供参考。

关键词：磷尾矿正浮选镁精矿

Efficacy and safety of single microneedle radiofrequency *** therapy on moderate-to-severe acne vulgaris:A prospective,randomized,controlled study

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Chinese Medical Journal 2024年第8期137卷 1006-1008页

作者： Chuchu Huang Mengping mao Yiran Peng Ben Wang yuxuan Deng Hongfu Xie Dan Jian Department of Dermatology Xiangya HospitalCentral South UniversityChangshaHunan 410008China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan 410008China Hunan Key Laboratory of Aging Biology Xiangya HospitalCentral South UniversityChangshaHunan 410008China Department of Dermatology and Allergy and Christine Kühne-Center for Allergy Research and EducationUniversity Hospital of BonnD-53127BonnGermany

To the Editor:Acne vulgaris is a prevalent skin disorder affecting both physical and psychosocial health.[1]Although photodynamic therapy(PDT)exists for moderate-to-severe acne,due to its adverse reactions,we are still looking forward to a novel therapeutic option with fewer side ***,radiofrequency has been used to treat moderate acne.[2]In this study,we aimed to evaluate the efcacy and safety of moderate-to-severe acne treatment based on a single microneedle with radiofrequency(MRF)*** during three consecutive sessions through a prospective,randomized,and controlled trial study.

关键词： needle prospective randomized

Injectable hydrogel wound dressing based on strontium ion cross-linked starch

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Frontiers of Materials Science 2020年第2期14卷 232-241页

作者： yuxuan mao Mingming PAN Huilin YANG Xiao LIN Lei YANG College of Chemistry Chemical Engineering and Materials ScienceOrthopaedic InstituteSoochow UniversitySuzhou 215006China Department of Orthopaedics The First ffiliated HospitalSoochow UniversitySuzhou 215006China Center for Health Science and Engineering School of Materials Science and EngineeringHebei University of TechnologyTianjin 300131China

Severe skin wounds cause great problems and sufferings to *** this study,an injectable wound dressing based on strontium ion cross-linked starch hydrogel(SSH)was developed and *** good inject-ability of SSH made it easy to be delivered onto the wound *** good tissue adhesiveness of SSH ensured a firm protection of the ***,SSH supported the proliferation of NIH/3T3 fibroblasts and facilitated the migration of human umbilical vein endothelial cells(HUVECs).Importantly,SSH exhibited strong antibacterial effects on Staphylococcus aiireiis(***/rec/s),which could prevent wound *** results demonstrate that SSH is a promising wound dressing material for promoting wound healing.

关键词： wound dressing injectable antibacterial gel-point adhesive hydrogel(GPAH)

Physical dosimetric reconstruction of a case of large area back skin injury due to overexposure in an interventional procedure

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Radiation Medicine and Protection 2022年第1期3卷 3-8页

作者： Yuchen Yin Xuan Wang Xianghui Kong Wenyue Zhang Yidi Wang yuxuan mao Jianwei Wang Tianhe Jia Yu Tu Bingjie Zhang Liang Sun State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversityCollaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education InstitutionsSuzhou 215123China Prevention and Treatment Center for Occupational Disease of Xinxiang City XinxiangHenan 453003China

To estimate the physical dose of skin and key organs in a case of overexposure during a cardiac interventional *** The female patient aged 50 suffered from owerexposure during ardiac interventional therapy in a hospital,Xinxiang city,Henan province,China in January *** mesh-type phantom for the patient was constructed based on the adult mesh-type reference computational phantoms(MRCPs)released by the International Comission on Radiological Protection Publication 145 (ICRP145)and phantom deformation *** of exposure scenario were constructed and simulated with particle and heavy ion transport code system(PHTTS)according to exposure ***:The maximum absorbed dose of key organs/tissues under iradiation in posteroanterior(PA)and 30°left anterior oblique directions(LOA)was 632.4 and 305.6 mGy,*** let lung,heart,and left mammary gland received a larger dose under both iradiation *** ratio of the absorbed dose with and without shielding was a lculated,and the relative difference in most organs was<1%between two *** iso-dose curve of the back skin revealed the ditribution of the absorbed dose(0.1-5.2 Gy).The dose estimate of key tssues/organs was higher than the conventional level,especially the local skin,up to 5.2 *** The interventional procedure in this ase resulted in a higher *** Carlo codes combined with the MRCPs can be employed to estimate physical dose to individuals in concrete irradia tion scenarios.

关键词： Physical dose Dose reconstruction Digital subtraction angiography Monte Carlo codes Particle and heavy ion transport code system (PHITS) Mesh-type phantoms

Portal Fibrotic Cord is Associated with Transjugular Intrahepatic Portosystemic Shunt Failure and Death in Cirrhotic Patients

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Journal of Clinical and Translational Hepatology 2023年第4期11卷 809-816页

作者： Yunshu Yang Chuangye He Xulong Yuan Kai Li Wenyuan Jia Jing Niu Na Han Jiao Xu Ying Zhu Li Xu yuxuan mao Yuanping Xu Xiaoyuan Gou Jun Tie National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Air Force Medical UniversityXi’anShaanxiChina

Background and Aims:Occlusive portal vein thrombosis(PVT)often causes portal hypertension-related complications in cirrhotic *** intrahepatic portosystemic shunt(TIPS)is an effective treatment for this difficult ***,the factors influencing TIPS success and overall survival in patients with occlusive PVT are *** study investigated the factors influencing TIPS success and overall survival in cirrhotic patients with occlusive ***:Cirrhotic patients with occlusive PVT were selected from a prospective database of consecutive patients treated with TIPS in Xijing Hospital between January 2015 and May *** characteristics,TIPS success rate,complications,and survival were collected,and the factors associated with the TIPS success rate and transplant-free survival were ***:A total of 155 cirrhotic patients with occlusive PVT were *** succeeded in 126(81.29%)*** 1-year survival rate was 74%.Compared with those without,patients with portal fibrotic cord had a lower TIPS success rate(39.02%vs.96.49%,p<0.001),shorter median overall survival(300 vs.1,730 days,p<0.001)and more operation-related complications(12.20%vs.1.75%,p<0.01).Logistic regression analysis found that portal fibrotic cord(odds ratio 0.024)was a risk factor for TIPS *** and multivariate analysis showed that portal fibrotic cord was an independent predictor of death(hazard ratio 2.111;95%CI:1.094-4.071,p=0.026).Conclusions:Portal fibrotic cord increased the TIPS failure rate and is a risk factor for poor prognosis in cirrhotic patients.

关键词： Fibrotic cord Occlusive portal vein thrombosis Portal hypertension-related complications Transjugular intrahepatic portosystemic shunt Liver cirrhosis

Starch-based adhesive hydrogel with gel-point viscoelastic behavior and its application in wound sealing and hemostasis

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Journal of Materials Science & Technology 2021年第4期63卷 228-235页

作者： yuxuan mao Peng Li Jiewei Yin Yanjie Bai Huan Zhou Xiao Lin Huilin Yang Lei Yang College of Chemistry Chemical Engineering and Materials ScienceOrthopaedic InstituteSoochow UniversitySuzhou215000China Department of Orthopaedics The First Affiliated HospitalSoochow UniversitySuzhou215000China School of Public Health Soochow UniversitySuzhou215000China Center for Health Science and Engineering(CHSE) School of Materials Science and EngineeringHebei University of TechnologyTianjin300000China School of Mechanical Engineering Jiangsu University of TechnologyChangzhou213000China

Hydrogels with tissue adhesiveness have demonstrated great promise for wearable electronics,artificial skin,soft robotics,and tissue ***,adhesive hydrogels that are capable of sealing and hemostasis of wound with severe hemorrhage still *** this purpose,a series of ionically crosslinked starch hydrogels were developed *** viscoelastic properties and tissue adhesiveness of the starch hydrogels were *** is shown that the starch and cross linkers had significant influence on the viscoelastic properties of the starch hydrogels,which further resulted in varied tissue *** the starch gels,there was one exhibiting a unique and stable"Gel Point"viscoelastic characteristic and it was named as gel-point adhesive hydrogel(GPAH).GPAH showed electrical conductivity,high tissue adhesiveness,high stretch-ability,self-healing capability,injectability,and *** GPAH also exhibited high cytocompatibility,low hemolysis risk,and strong antibacterial *** wound sealing and hemostatic performance of GPAH was further evaluated by a rat femoral artery injury *** blood loss after the sealing of GPAH(2.4±1.3 g)was significantly decreased compared to the group using gauze for sealing(6.3±1.5 g).Meanwhile,GPAH did not cause pathological changes of the soft tissues surrounding the *** above results indicate that GPAH,with high tissue adhesiveness,suitable viscoelastic property,strong antibacterial capacity,as well as electro-conductivity,bears great potential for the applications in smart wound management.

关键词： sealing viscoelastic hydrogel

Characteristics of novel Ti-10Mo-xCu alloy by powder metallurgy for potential biomedical implant applications

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Bioactive Materials 2020年第3期5卷 659-666页

作者： Wei Xu Chenjin Hou yuxuan mao Lei Yang Maryam Tamaddon Jianliang Zhang Xuanhui Qu Chaozong Liu Bo Su Xin Lu Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsInstitute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijingChina Institute of Orthopaedic&Musculoskeletal Science University College LondonRoyal National Orthopaedic HospitalStanmoreHA74LPUK Center for Health Science and Engineering Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control TechnologySchool of Materials Science and EngineeringHebei University of TechnologyTianjin300130China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Bristol Dental School University of BristolBristolBS12LYUK

When biomaterials are implanted in the human body,the surfaces of the implants become favorable sites for microbial adhesion and biofilm formation,causing peri-implant infection which frequently results in the failure of prosthetics and revision ***-Mo alloy is one of the commonly used implant materials for load-bearing bone replacement,and the prevention of infection of Ti-Mo implants is therefore *** this study,bacterial inhibitory copper(Cu)was added to Ti-Mo matrix to develop a novel Ti-Mo-Cu alloy with bacterial inhibitory *** effects of Cu content on microstructure,tensile properties,cytocompatibility,and bacterial inhibitory ability of Ti-Mo-Cu alloy were systematically *** revealed that Ti-10Mo-1Cu alloy consisted ofαandβphases,while there were a few Ti2Cu intermetallic compounds existed for Ti-10Mo-3Cu and Ti-10Mo-5Cu alloys,in addition toαandβ*** tensile strength of Ti-10Mo-xCu alloy increased with Cu content while elongation ***-10Mo-3Cu alloy exhibited an optimal tensile strength of 1098.1 MPa and elongation of 5.2%.Cytocompatibility study indicated that none of the Ti-10Mo-xCu alloys had a negative effect on MC3T3-E1 cell *** inhibitory rates against *** and *** increased with the increase in Cu content of Ti-10Mo-xCu alloy,within the ranges of 20-60%and 15-50%,*** together,this study suggests that Ti-10Mo-3Cu alloy with high strength,acceptable elongation,excellent cytocompatibility,and the bacterial inhibitory property is a promising candidate for biomedical implant applications.

关键词： Ti-10Mo-xCu alloy Microstructure Mechanical properties Cytocompatibility Bacterial inhibitory property

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军校本科生心理危机预警关键指标的构建

中国健康心理学杂志 2023年第12期31卷 1870-1875页

作者：茅瑜璇韩立敏刘星中国人民解放军国防科技大学湖南长沙410008 天津警备区河东第一离职干部休养所

目的:探索用于军校本科生心理危机预警的关键指标,在个体发生严重恶劣危机事件之前对其进行识别干预,做到防患于未然。方法:采用开放式问卷调查、德尔菲法构建军校本科生心理危机预警的指标条目。以处理过本科生严重心理危机事件的学员... 详细信息

目的:探索用于军校本科生心理危机预警的关键指标,在个体发生严重恶劣危机事件之前对其进行识别干预,做到防患于未然。方法:采用开放式问卷调查、德尔菲法构建军校本科生心理危机预警的指标条目。以处理过本科生严重心理危机事件的学员队干部为研究对象,采用自编开放式问卷提取军校本科生心理危机预警初始指标,而后采用德尔菲法对获得的初步指标进行专家咨询,经4轮咨询后取得心理危机关键预警指标。结果:开放式问卷调查得到42条初始预警指标;4轮德尔菲法专家积极系数均为100%,权威程度分别为0.859,0.886,0.863,0.859,Kendall’s W分别为0.325,0.174,0.118,0.095,P<0.05,重要性赋值均值分别为3.897、4.044、4.208、4.252,最终形成应激源、应激反应、易感因素3个维度共11项重要预警指标。结论:专家积极性、权威程度、意见集中程度较高,构建的军校本科生心理危机关键预警指标科学、合理。

关键词：心理危机心理危机预警预警指标德尔菲法