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Evaluation of a Suspended Personal Radiation Protection System vs. Conventional Apron and Shields in Clinical Interventional Procedures

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Open Journal of Radiology 2013年第3期3卷 143-151页

作者： Clare Savage Thomas M. Seale iv Cathryn J. Shaw Bruner P. Angela Daniel Marichal Chet R. Rees Department of Radiology Medical Center Baylor University Dallas USA River City Imaging San Antonio USA

Purpose: This clinical study compares conventional lead aprons and ancillary shields to a functionally weightless personal overhead-supported system with expanded coverage. Materials and Methods: Primary operators performed procedures (n = 126, fluoroscopy minutes = 1209) using one of 2 methods of radiation protection and wearing dosimeters on multiple body locations. Method “LAS” (Lead-Apron+Shields): lead skirt, vest, thyroid shield, with 100% use of under-table shield, side shield, and mobile suspended lead-acrylic shield. Method “Zgrav”: ZeroGravity system (CFI Medical Solutions) with variable use of shielding. The studied early model moving with the operator had a curved lead-acrylic head shield (0.5 mm Pb) and expansive lead apron (0.5 - 1.0 mm Pb) that covered leg to distal calf and proximal arm to elbow, and a drape that permitted sterile entry and exit. Study was institutional review board approved and HIPPA-compliant. Results: Measured with a sensitive electronic dosimeter, eye exposures were 99% (P 0.001) reduced for Zgrav with upgraded face shield vs. LAS, regardless of use or non-use of suspended shield with Zgrav. With optically stimulated luminescence (OSL) dosimeters, operator exposures, standardized to minutes of fluoroscopy and Fluoroscopic Patient Dose Area Product, were reduced by 87% - 100% for eye & head, neck, humerus, and tibia (Zgrav vs. LAS). Overall eye & head exposure reduction for entire study was 94%. non-equivalence of torso exposures was not demonstrated. A brief user survey showed ergonomic advantages of Zgrav. Conclusion: Compared to conventional lead aprons with shields, the suspended system provided superior operator protection during interventional fluoroscopy, allowing operators to perform procedures without potentially obstructive shields.

关键词： Radiation Protection Radiation Fluoroscopy

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Determination of the Real Dotation and Forecast of the Potable Water System in the Huancavelica City, Peru

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Journal of Environmental Science and Engineering(A) 2019年第6期8卷 241-248页

作者： iv.n Ayala Bizarro ivette Contreras Espinoza Cristel Aguirre Vera Marco López Barrantes Jorge Ortega Vargas Abdon Olivera Quintanilla Hugo Lujan Jeri Eleuterio Alcántara Espinoza Department of Civil Engineering National University of HuancavelicaHuancavelica 09001Peru

The research entitled,“Determination of the Real Dotation and Forecast of the Potable Water System in the Huancavelica city-Peru”,has as objective to determine and analyze the actual endowment and prognosis of the drinking water system in the city of *** city of Huancavelica has a population of approximately 50,000.00 inhabitants and 10,680.00 users of drinking water and sewerage according to the source Companies Providing This Service,the same one that is located in the western chain and central saw range of Perúand belongs to a cold *** sample was extracted through Companies Providing This Service EMAPA Huancavelica SA(Anonymous Society),which corresponds to 1,296 data from the consumption of water in cubic meters of each dwelling located in the various categories of each *** results obtained from the research indicate that the category that consumed more water during the period 2004-2018 was the domestic category,the same one that had an average of 1,152,123 cubic meters,this is due to the population growth of each *** the other side,the category that consumed the least water was the social category,the average consumption of which was 11,903.47 cubic *** addition,the greatest variability in water consumption is in the state category,the total variation being equal to 21.6%.In the Huancavelica city,water consumption has a growing trend and to predict the volume of drinking water consumption by 2030,water consumption was transformed by first differences,using the ARIMA(Autoregressive Integrated Moving Average)model for total consumption model(0-1-1)(2-0-0)-12 and for the domestic consumption the ARIMA model(0-1-2)(0-0-2)-*** the other hand,water consumption was analyzed on a monthly basis in which there is greater variability for the months June-6 and *** was taken into account for the calculation of the endowment the domestic consumption,having values ranging from 6.45 L/inhab/day until 1,460 L/inhab/day,which re

关键词： Drinking water real consumption critical demand forecasting drinking water

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物质滥用和自杀行为:对因有自杀企图和意念而住院的青少年的研究

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世界核心医学期刊文摘（儿科学分册） 2005年第11期1卷 19-20页

作者： Méan M. Righini n.C. narring F. P.-A. Michaud 郭战宏 UMSA CHUV 1011 Lausanne Switzerland

Aim: To study the prevalence of psychoactive substance use disorder (PSUD) among suicidal adolescents, psychoactive substance intoxication at the moment of the attempt, and the association between PSUD at baseline and either occurrence of suicide or repetition of suicide attempt(s). Methods: 186 adolescents aged 16 to 21 y hospitalized for suicide attempt or overwhelming suicidal ideation were included (TO); 148 of them were traced again for evaluations after 6 mo (T1) and/or 18 mo (T2). DSM-iv diagnoses were assessed each time using the Mini International neuropsychiatric Interview. Results: At TO, 39.2%of the subjects were found to have a PSUD. Among them, a significantly higher proportion was intoxicated at the time of the attempt than those without PSUD(44.3%vs 25.4%). Among the 148 adolescents who could be traced at either T1 or T2, two died from suicide and 30 repeated suicide attempts once or more times. A marginally significant association was found between death by suicide/repetition of suicide attempt and alcohol abuse/dependence at baseline (OR 3.3, 95%CI 0.7～15.0; OR 2.6, 95%CI 0.7～9.3). More than one suicide attempt before admission to hospital at T0 (OR 3.2, 95%CI 1.1～10.0) and age over 19 y at T0 (OR 3.2, 95%CI 1.1～9.2) were independently associated with the likelihood of death by suicide or repetition of suicide attempt. Conclusion: Among adolescents hospitalized for suicide attempt or overwhelming suicidal ideation, the risk of death or repetition of attempt is high and is associated with previous suicide attempts-especially among older adolescent sand also marginally associated with PSUD; these adolescents should be carefully evaluated for such risks and followed up once discharged from the hospital.

关键词：自杀企图物质滥用自杀行为自杀死亡精神活性物质神经精神病学酒精滥用临界相前有

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Thermal Comparison of an Organic Rankine Cycle Activated by a Low-Temperature Geothermal Heat Source

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Journal of Mechanics Engineering and Automation 2018年第7期8卷 309-315页

作者： Vera-Romero iv.n Corona-Ruíz Silvia L. Martínez Reyes J. Moreno nava I. Ordaz Murillo O. Méndez á brego Víctor M Department of Energy Engineering University of the Ciénega of Michoacán State Sahuayo 59103 Mexico Department of Multicultural Studies University of the Ciénega of Michoacán State Sahuayo 59103 Mexico

This study compares the results from the thermodynamic analysis at an Organic Rankine Cycle power plant,for first and second law efficiency,operating with 14 different working *** plant—located in the town of Los negritos,in the municipality of Villamar,in the State of Michoacán,Mexico—uses heat from a low-temperature geothermal source with the purpose of identifying the working fluids that are best suited for the operating conditions at *** v.8.0 software was used to collect the thermodynamic *** all the thermodynamic parameters that were analyzed,the fluid that performed the best had an overall energy efficiency of 5.87%,an overall exergy efficiency of 43.07%,and a net output power of 13.04 kWe.

关键词： Organic Rankine cycle geothermal energy Los negritos thermodynamic analysis exergy

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欧洲法学发展再统一的重要贡献--评Gábor Hamza教授的新著《欧洲私法的发展趋势》

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中国国际私法与比较法年刊 2008年第1期11卷 554-562页

作者： Gergely Deli iv.n Siklósi 李震东(译) 汪园(译) 秦天宝(校) Gyór大学法学院 Eötvös Loránd大学(布达佩斯)法学院武汉大学法学院武汉大学环境法研究所

在相继出版三部相关著作后①,Hamza教授又出版了他的最新著作,这无疑对欧洲法学发展的再统一作出了重要贡献(这里的“欧洲”一词具有比较广泛的文化和历史意义)。作者明确表明他的目标是要追溯与欧洲法律秩序相关的私法的共同历史根源。

关键词：历史根源法学发展趋势私法欧洲贡献统一

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基于SOX9的生物学研究及其在肝癌干细胞中的研究进展

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中国临床医学 2016年第6期23卷 838-840页

作者：王孟超黄罡周伟平第二军医大学东方肝胆外科医院肝外三科上海200433

肿瘤干细胞是指在肿瘤组织中高度恶性的细胞亚群,具有高侵袭性、易转移性、多耐药性特点,与肿瘤复发密切相关。因此,肿瘤干细胞可能成为未来肿瘤治疗的靶点。目前发现的肿瘤干细胞标志物包括CD133、CD90、CD44等。SOX9(sex determining ... 详细信息

肿瘤干细胞是指在肿瘤组织中高度恶性的细胞亚群,具有高侵袭性、易转移性、多耐药性特点,与肿瘤复发密切相关。因此,肿瘤干细胞可能成为未来肿瘤治疗的靶点。目前发现的肿瘤干细胞标志物包括CD133、CD90、CD44等。SOX9(sex determining region Y box-9)除了参与多个器官的生长发育外,还与组织纤维化及肿瘤的发生有着密切关系,尤其在多种肿瘤干细胞中高表达。SOX9亦在肝癌干细胞中高表达,并通过相关信号通路影响肝癌干细胞的自我更新、增殖以及耐药,因此成为肝癌潜在的预后判断指标和治疗靶点。

关键词：肿瘤干细胞肝细胞肝癌 SOX9

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基于“克强指数”对中国GDP的混频预测研究

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青岛大学学报（自然科学版） 2018年第1期31卷 150-156页

作者：秦梦孙毅代天娇青岛大学经济学院青岛266061

通过构建MIDAS混频数据模型,基于"克强指数"对中国季度GDP增长率进行预测研究,并与ADL同频模型的预测误差相比较,结果表明,MIDAS混频数据模型在预测精度上占优,因此可用月度"克强指数"对季度GDP增长率进行预测,为宏观经济政策的制定提... 详细信息

通过构建MIDAS混频数据模型,基于"克强指数"对中国季度GDP增长率进行预测研究,并与ADL同频模型的预测误差相比较,结果表明,MIDAS混频数据模型在预测精度上占优,因此可用月度"克强指数"对季度GDP增长率进行预测,为宏观经济政策的制定提供依据。

关键词： MIDAS模型混频数据预测精度克强指数 GDP增长率

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卵巢上皮癌二探手术阳性患者预后因子的研究

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世界核心医学期刊文摘（妇产科学分册） 2006年第10期2卷 41-42页

作者： McCreath W.A. Eisenhauer E.L. Abu-Rustum n.R. D.S. Chi 朱磊 Gynecology Service Department of Surgery Memorial Sloan-Kettering Cancer Center 1275 York Avenue MRI-1026 New York NY 10021 United States

Objective.: The objective of this study was to identify independent prognostic factors for survival in patients with epithelial ovarian cancer who had persistent disease identified at second look surgery. Methods.: We performed a retrospective chart review of all patients with epithelial ovarian cancer who had positive findings at second-look surgery between June 1991 and June 2002. All patients achieved a complete clinical remission after a prescribed course of primary therapy. Survival was determined from the time of second-look surgery until last follow-up or death. Results.: The study included a total of 262 patients, with a median age of 54 years(range, 22-80). Of the 262 patients, 166(63%) had died of disease. Records of initial(salvage) treatment after the positive second-look surgery were available for 243 patients. Therapies included the following: intraperitoneal(IP) cisplatin, 71(29%); IP cisplatin combined with a second drug, 53(22%); IP therapy other than cisplatin, 29(12%); intravenous(iv) chemotherapy, 50(21%); IP and iv therapy, 35(14%); and oral chemotherapy, 5(2%). Of the 13 potential prognostic factors analyzed, only 2 factors emerged that, when combined, were significant-residual disease after primary surgery and size of persistent disease found at second-look surgery. Patients with ≤1 cm residual disease after primary surgery and microscopic disease at second-look surgery had significantly improved survival. Conclusion.: In our analysis, the only prognostic factor for survival in patients with positive second-look procedures was a combination of residual disease after primary surgery and size of persistent disease identified at second-look surgery. no individual chemotherapy treatment imparted a survival advantage. novel that therapeutic approaches are needed in this setting.

关键词：二探手术卵巢上皮癌预后因子残留病灶生存时间初始治疗末次随访化疗药物个体化化疗持续性

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C-反应蛋白、白细胞介素-6、分泌型磷脂酶A_2亚型IIA和细胞间黏附分子-1在急性冠状动脉综合征早期的表达和长期随访中的变化

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世界核心医学期刊文摘（心脏病学分册） 2006年第8期2卷 36-37页

作者： Hartford M. Wiklund O. Hultén L. M. 徐永城(译) 任付先(校) Department of Cardiology Sahlgrenska University Hospital SE-413 45 Goeteborg Sweden 不详

Objectives: The objectives of this study were to examine the time course of the inflammatory response in acute coronary syndromes(ACS) and to assess the markers of inflammation and their relation to disease severity. Methods: We prospectively studied 134 patients with ACS who survived for at least 30 months. The patients were divided into four groups: acute myocardial infarction(MI) with(n=54) or without(n=46) ST-segment elevation and unstable angina with(n=14) or without(n=20) increased risk. Plasma levels of C-reactive protein(CRP), interleukin-6(IL-6), secretory phospholipase A2 group IIA(sPLA2-IIA), and intercellular adhesion molecule-1(ICAM-1) were measured on days 1 and 4 and after 3 and 30 months. Results: The highest levels of CRP and sPLA2-IIA were seen on day 4 but for IL-6 on day 1. These three markers, but not ICAM-1, were significantly related to disease severity, CKMB, and ejection fraction. Patients in Killip class II-iv had higher levels than those in Killip class I. The individual acute-phase responses correlated with marker levels at 3 and 30 months. ICAM-1 correlated with the development of congestive heart failure. Conclusions: In ACS there seems to be an individual predisposition to inflammatory response. Plasma IL-6 is the first marker to rise, while sPLA2-IIA and CRP peak later. All three markers, especially CRP, may discriminate between MI and non-MI. ICAM-1 seems to reflect other aspects of the inflammatory processes than the other markers. The results emphasize the complexity of the inflammatory response in ACS and stress the need for further studies involving multiple markers.

关键词： C-反应蛋白(CRP) 急性冠状动脉综合征细胞间黏附分子-1 白细胞介素-6 分泌型磷脂酶 A2亚型长期随访 ST段抬高型急性心肌梗死不稳定型心绞痛疾病严重程度

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在重症监护病房中通过麻醉维持装置给予七氟烷与静脉给予丙泊酚进行镇静时肾脏的完整性比较

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麻醉与镇痛 2010年第4期6卷 46-52页

作者： Kerstin D. Rohm Andinet Mengism Joachim Boldt Jochen Mayer Grietje Beck Swen n. Piper 韩毅(译) 郭政(校) Department of Anesthesiology and Critical Care Medicine Klinikum Ludwigshafen Ruprecbt-Karls-University of Heidelberg Theodor-Kutzer-Ufer 1-3 Germany University Hospital Mannheim Ruprecbt-Karls-University of Heidelberg Theodor-Kutzer-Ufer 1-3 Germany 不详

背景在20世纪70年代运用甲氧氟烷后，无机氟化物水平增加以及手术中七氟烷使用延长被认为具有潜在的肾毒性。在重症监护病房（ICU）我们观察通过麻醉维持装置（ACD）短时吸入七氟烷进行手术后镇静对肾脏完整性的影响，并与丙泊酚进行比... 详细信息

背景在20世纪70年代运用甲氧氟烷后，无机氟化物水平增加以及手术中七氟烷使用延长被认为具有潜在的肾毒性。在重症监护病房（ICU）我们观察通过麻醉维持装置（ACD）短时吸入七氟烷进行手术后镇静对肾脏完整性的影响，并与丙泊酚进行比较。方法前瞻、随机、单盲的研究中，125例接受腹主动脉或胸外手术的患者被分为2组，分别接受ACD给予七氟烷（呼气末浓度0．5-1vol％）（n=64）或静脉给予丙泊酚（n=61）进行手术后24小时镇静：尿α-谷胱甘肽-s-转移酶作为主要观察指标，尿n-乙酰氨基葡萄糖苷酶、血清肌酐以及无机氧聚合物、尿排出量和输液量分别在手术前、手术结束和手术后24、48小时进行测量：结果七氟烷（9．2±4．3小时）组和丙泊酚（9．3±4．7小时）组在ICU镇静时间相当。与手术前比较两组尿α-谷胱甘肽-s-转移酶在手术后24和48小时明显增高，但组间差异无显著性。n-乙酰氨基葡萄糖苷酶、血清肌酐两组都保持不变，两组间尿排出量和肌酐廓清率在整个观察期间都大致相当。使用七氟烷（39±25μmol/L）24小时后与丙泊酚（3±6μmol／L）组比较无机氧化物明显增加（P〈0．001），并且在48小时内保持增高水平（33±26 vs 3±5μmol／L）：每组都有一例患者伴有肾功能不全，住院期间需要加强利啄疗法，但不需要透析；结论手术后无论用ACD给予七氟烷还是用丙泊酚维持的短时镇静都不会对肾脏功能造成负性影响。尽管使用七氟烷后无机氟化物水平较高，但在住院期间肾小球和肾小管仍然保持了完整性。

关键词：重症监护病房术后镇静肾脏功能七氟烷麻醉维持丙泊酚 α-谷胱甘肽-s-转移酶乙酰氨基葡萄糖苷酶

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