大鼠体内大脏器创伤模型涂布康派特?医用胶后生物反应观测

目的：评价康派特?医用胶对大鼠内脏创面止血后的安全性及其体内降解情况。方法：大鼠随机分为空白对照组,手术对照组和手术涂胶组,给胶组分别给予8μL或40μL康派特?医用胶。术后动物进行临床症状观察,体重、摄食量测定,血常规、血清生化学、脏器重量和组织病理学检查。结果：各项指标均未见与康派特?医用胶相关毒性反应;6个月组织病理学检查可见胶体被纤维结缔组织逐渐分割,多核巨细胞和炎症细胞参与异物降解。结论本实验条件下,未见康派特?医用胶对大鼠机体有毒性作用,胶体在大鼠体内6个月开始降解。     

Human identification performed with skull’s sphenoid sinus based on deep learning

Human identification plays a significant role in the investigations of disasters and criminal cases. Human identification could be achieved quickly and efficiently via 3D sphenoid sinus models by customized convolutional neural networks. In this retrospective study, a deep learning neural network was proposed to achieve human identification of 1475 noncontrast thin-slice CT scans. A total of 732 patients were retrieved and studied (82% for model training and 18% for testing). By establishing an individual recognition framework, the anonymous sphenoid sinus model was matched and cross-tested, and the performance of the framework also was evaluated on the test set using the recognition rate, ROC curve and identification speed. Finally, manual matching was performed based on the framework results in the test set. Out of a total of 732 subjects (mean age 46.45 years ± 14.92 (SD); 349 women), 600 subjects were trained, and 132 subjects were tested. The present automatic human identification has achieved Rank 1 and Rank 5 accuracy values of 93.94% and 99.24%, respectively, in the test set. In addition, all the identifications were completed within 55 s, which manifested the inference speed of the test set. We used the comparison results of the MVSS-Net to exclude sphenoid sinus models with low similarity and carried out traditional visual comparisons of the CT anatomical aspects of the sphenoid sinus of 132 individuals with an accuracy of 100%. The customized deep learning framework achieves reliable and fast human identification based on a 3D sphenoid sinus and can assist forensic radiologists in human identification accuracy.

     

Development and validation of a novel 133-plex forensic STR panel (52 STRs and 81 Y-STRs) using single-end 400 bp massive parallel sequencing

International Journal of Legal Medicine - Short tandem repeats (STRs) are the preferred genetic markers in forensic DNA analysis, routinely measured by capillary electrophoresis (CE) method based...     

布-加综合征介入治疗护理规范专家共识

【摘要】 为促进布-加综合征（BCS）介入治疗围手术期护理标准化和规范化,保障患者安全,促进患者康复,特制定本共识。本共识以我国BCS的介入治疗临床实践为基础,结合国内外相关文献,就BCS介入治疗的专科护理评估、术中护理配合、疗效评价、术后护理、常见严重并发症及其护理进行了全面阐述,旨在为BCS介入治疗围手术期护理提供指导与参考。     

河南“4.26”60Co源辐射事故一例受照者患非霍奇金淋巴瘤的病因探讨

关于电离辐射是否可诱发非霍奇金淋巴瘤（NHL）,目前的研究结果尚未获得一致结论。笔者报道了河南“4.26” 60Co源辐射事故中1例中度骨髓型急性放射病患者受照后第13年患NHL的病例,结合患者的受照史、病史特点、诊断及国际多项大型研究,从流行病学资料和影响因素两方面分析了患者“天”患非霍奇金淋巴瘤与电离辐射的关系,为电离辐射致NHL提供辐射流行病学依据。     

Chromic-P32 phosphate treatment of implanted pancreatic carcinoma： Mechanism involved

AIM: To study the effects of chromic-P32 phosphate (32P colloids) interstitial administration in Pc-3 implanted pancreatic carcinoma, and investigate its anticancer mechanism. METHODS: Ninety-eight tumor bearing nude mice were killed at different time points after the injection of 32P colloids to the tumor core with observed radioactivity. The light microscopy, transmission electron microscopy (TEM) and immuno-histochemistry and flow cytometry were used to study the rates of tumor cell necrosis, proliferating cell nuclear antigen index, the micro vessel density (MVD). The changes of the biological response to the lymphatic transported 32P colloids in the inguinal lymph node (ILN) were dynamically observed, and the percentage of tumor cell apoptosis, and Apo2.7, caspase-3, Bcl-2, Bax-related gene expression were observed too. RESULTS: The half-life of effective medication is 13 d after injection of 32P colloids to the tumor stroma, in 1-6 groups, the tumor cell necrosis rates were 20%, 45%, 65%, 70%, 95% and 4%, respectively (F= 4.14-105.36, P<0.01). MVD were 38.5±4.0,28.0±2.9,17.0±2.9,8.8±1.5, 5.7±2.3 and 65.0±5.2 (t=11.9-26.1,P<0.01),respectively. Under TEM fairly differentiated Pc-3 cells were found. Thirty days after medication, tumors were shrunk and dried with scabs detached, and those in control group increased in size prominently with plenty of hypodermic blood vessels. In all animals the ILN were enlarged but in medicated animals they appeared later and smaller than those in control group.The extent of irradiative injury in ILN was positively correlated to the dosage of medication. Typical tumor cell apoptosis could be found under TEM in animals with intra-tumoral injection of low dosed 32P colloids. The peak of apoptosis occurred in 2.96 MBq group and 24 h after irradiation. In the course of irradiation induced apoptosis,the value of Bcl-2/Bax was down regulated; Apo2.7 and caspase-3 protein expression were prominently increased dose dependently. CONCLUSION: 32P colloids intra-tumor injection having prominent anticancer effectiveness may reveal the ability of promoting cell differentiation. The low dose 32P colloids may induce human pancreatic carcinoma Pc-3 implanted tumor cell apoptosis; Apo2.7, caspase-3, Bcl-2 and Bax protein participated in regulating the process of irradiation induced cell apoptosis.     

注射用丹参多酚酸对神经系统疾病药理作用的研究进展

注射用丹参多酚酸（SAFI）作为脑梗死的辅助治疗药,能有效改善神经功能缺损症状,有效性和安全性已经得到认可。近年研究发现SAFI在神经系统疾病中具有抗炎、抑制氧化应激、抑制神经细胞凋亡、拮抗缺血再灌注损伤、稳定斑块、改善认知功能等作用。就近年来国内外对SAFI在中枢神经系统疾病中的药理作用的研究进展进行综述,为进一步深度研发和临床合理应用提供依据。     

益生菌制剂对儿童反复呼吸道感染的疗效和免疫功能影响的系统评价

目的 系统评价益生菌制剂防治儿童反复呼吸道感染（RRTIs）的有效性和安全性,为临床提供循证参考。方法计算机检索PubMed、EMBase、Cochrane图书馆、中国生物医学文献数据库（CBM）、中国学术期刊全文数据库（CNKI）、维普中文期刊全文数据库（VIP）和万方数据库,收集益生菌制剂（试验组）防治儿童RRTIs的随机对照试验（RCT）,检索时限均为建库起至2019年3月。提取资料,用Rev Man 5.3软件进行Meta-分析。结果 共纳入12项研究,878例患者。Meta-分析结果显示,试验组在总有效率［RR=1.31,95%CI（1.22,1.41）,P<0.001］、抗菌药用药时间［MD=-4.42,95%CI（-5.92,-2.91）,P<0.001］、年呼吸道感染次数［MD=-2.30,95%CI（-2.70,-1.89）,P<0.001］、临床体征改善时间均优于对照组（P<0.05）;免疫球蛋白IgG ［MD=1.80,95%CI （1.60,2.01）,P<0.001］、IgA ［MD=0.37,95%CI（0.23,0.51）,P<0.001］、IgM［MD=0.06,95%CI（0.02,0.09）,P=0.002］,T淋巴细胞亚群CD3+［MD=4.48,95%CI（1.48,7.49）,P=0.03］、CD4⁺［MD=3.17,95%CI（1.01,5.55）,P=0.009］和CD8⁺［MD=-4.44,95%CI（-6.52,-2.36）,P<0.05］改善情况均显著优于对照组,差异均有统计学意义（P<0.05）。结论 益生菌可有效治疗儿童反复呼吸道感染,安全性较好。但由于纳入研究数量少,研究质量不统一,尚需要大样本、高质量的临床随机对照研究予以证实。