Preparation and electrochemical performance of VO2(A) hollow spheres as a cathode for aqueous zinc ion batteries

Rechargeable aqueous zinc ion batteries (ZIBs), owing to their low-cost zinc metal, high safety and nontoxic aqueous electrolyte, have the potential to accelerate the development of large-scale energy storage applications. However, the desired development is significantly restricted by cathode materials, which are hampered by the intense charge repulsion of bivalent Zn²⁺. Herein, the as-prepared VO₂(A) hollow spheres via a feasible hydrothermal reaction exhibit superior zinc ion storage performance, large reversible capacity of 357 mA h g⁻¹ at 0.1 A g⁻¹, high rate capability of 165 mA h g⁻¹ at 10 A g⁻¹ and good cycling stability with a capacity retention of 76% over 500 cycles at 5 A g⁻¹. Our study not only provides the possibility of the practical application of ZIBs, but also brings a new prospect of designing high-performance cathode materials.

VO₂(A) hollow spheres exhibit superior zinc ion storage performance, large reversible capacity of 357 mA h g⁻¹ at 0.1 A g⁻¹, and good cycling stability with a capacity retention of 76% over 500 cycles at 5 A g⁻¹     

Cribriform Morular Variant of Papillary Thyroid Carcinoma in a Patient with an Incidental Neck Lump: a Case Report and Review of the Literature

The cribriform morular variant of papillary thyroid carcinoma (CMV-PTC) is a rare morphologic entity that is associated with familial adenomatous polyposis (FAP). We report a case of a young lady with an incidentally discovered right-sided neck nodule on ultrasonography with a diagnosis of CMV-PTC confirmed on thyroidectomy and review the literature associated with the clinical presentation, imaging characteristics, pathological findings and the association with FAP.     

Assessing the practice of data quality evaluation in a national clinical data research network through a systematic scoping review in the era of real-world data

ObjectiveTo synthesize data quality (DQ) dimensions and assessment methods of real-world data, especially electronic health records, through a systematic scoping review and to assess the practice of DQ assessment in the national Patient-centered Clinical Research Network (PCORnet).Materials and MethodsWe started with 3 widely cited DQ literature—2 reviews from Chan et al (2010) and Weiskopf et al (2013a) and 1 DQ framework from Kahn et al (2016)—and expanded our review systematically to cover relevant articles published up to February 2020. We extracted DQ dimensions and assessment methods from these studies, mapped their relationships, and organized a synthesized summarization of existing DQ dimensions and assessment methods. We reviewed the data checks employed by the PCORnet and mapped them to the synthesized DQ dimensions and methods.ResultsWe analyzed a total of 3 reviews, 20 DQ frameworks, and 226 DQ studies and extracted 14 DQ dimensions and 10 assessment methods. We found that completeness, concordance, and correctness/accuracy were commonly assessed. Element presence, validity check, and conformance were commonly used DQ assessment methods and were the main focuses of the PCORnet data checks.DiscussionDefinitions of DQ dimensions and methods were not consistent in the literature, and the DQ assessment practice was not evenly distributed (eg, usability and ease-of-use were rarely discussed). Challenges in DQ assessments, given the complex and heterogeneous nature of real-world data, exist.ConclusionThe practice of DQ assessment is still limited in scope. Future work is warranted to generate understandable, executable, and reusable DQ measures.     

改良Mini-CEX联合DOPS评价体系在麻醉科住院医师规培中的实践效果

目的探索以改良迷你临床演练评估(Mini-CEX)联合操作技能直接观察评估(DOPS)评价体系在麻醉科住院医师规培中的实践效果。方法以2017年与2018年进入某院麻醉科住院医师规范化培训基地的32名学员为研究对象,随机分为对照组和试验组各16名。对照组采用麻醉科传统规培模式,仅在年终考核时进行Mini-CEX、DOPS考核;试验组在传统规培模式基础上采用改良Mini-CEX联合DOPS评价模式,每月进行1次改良Mini-CEX、DOPS考核,包括年终考核共6次考核。对比2组学员年终考核成绩、首次考核成绩及教学满意度。结果试验组年终考核成绩的改良Mini-CEX评分、DOPS评分显著高于对照组,且试验组年终考核成绩明显优于首次考核成绩。试验组住院医师对教学满意度较对照组有明显提高。结论改良Mini-CEX联合DOPS评价体系有助于提高麻醉科住院医师规培的临床综合能力和操作技能水平,提升教学满意度和临床麻醉教学质量,值得推广与应用。     

不同临床分型的新型冠状病毒肺炎患者影像学表现

目的 探讨不同临床分型的新型冠状病毒肺炎（COVID-19）的影像学表现。方法 回顾性分析71例COVID-19患者的电子计算机断层扫描（computed tomography,CT）影像资料,分析普通型与重型及危重型患者的临床特点、影像学特点、优势分布以及出现好转时间,并进行统计学分析。结果 71例患者中,轻型12例,普通型45例,重型及危重型14例。临床表现方面,重型及危重型（6/14,42.9%;4/14,28.6%）伴乏力、胸闷及呼吸困难较轻型（0;0）及普通型（2/45,4.4%;0）明显,差异有统计学意义（P值分别为0.001,0.002）;普通型（30/45,66.7%）、重型及危重型（9/14,64.3%）C反应蛋白升高较轻型（2/12,16.7%）明显,差异有统计学意义（P=0.005）。CT表现,病变累及范围超过3个肺叶数：重型及危重型（13/14,92.9%）明显高于普通型（26/45,57.8%）;重型及危重型（12/14,85.7%）病变分布于两肺外周及中心多于普通型（20/45,44.4%）;病变表现为实变、病变内伴小叶间隔增厚,重型及危重型均多于普通型;以上表现两组相比,差异均有统计学意义（P值分别为0.036、0.007、0.004、0.002）。对22例患者进行随访,CT表现达高峰及病情出现好转多发生在发病10 d后（40.9%,45.5%）。结论 普通型与重型及危重型COVID-19患者胸部CT在发病部位、病变密度、实变程度等方面具有不同特征,多数COVID-19患者多在发病10 d后好转。     

Clinical progress and risk factors for death in severe Fever with thrombocytopenia syndrome patients

Background.?Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by the SFTS virus (SFTSV) with an average fatality rate of 12%. The clinical factors for death in SFTS patients remain unclear. Methods.?Clinical features and laboratory parameters were dynamically collected for 11 fatal and 48 non-fatal SFTS cases. Univariate logistic regression was used to evaluate the risk factors associated with death. Results.?Dynamic tracking of laboratory parameters revealed that during the initial fever stage, the viral load was comparable for the patients who survived as well as the ones that died. Then in the second stage when multi-organ dysfunction occurred, from 7-13 days after disease onset, the viral load decreased in survivors but it remained high in the patients that died. The key risk factors that contributed to patient death were elevated serum aspartate aminotransferase, lactate dehydrogenase, creatine kinase, and creatine kinase fraction, as well as the appearance of CNS (central nervous system) symptoms, hemorrhagic manifestation, disseminated intravascular coagulation, and multi-organ failure. All clinical markers reverted to normal in the convalescent stage for SFTS patients who survived. Conclusions.?We identified a period of 7-13 days after the onset of illness as the critical stage in SFTS progression. A sustained serum viral load may indicate that disease conditions will worsen and lead to death.