Lymph node pick up by separate stations: Option or necessity

AIM: To evaluate whether lymph node pick up by separate stations could be an indicator of patients submitted to appropriate surgical treatment. METHODS: One thousand two hundred and three consecutive gastric cancer patients submitted to radical resection in 7 general hospitals and for whom no information was available on the extension of lymphatic dissection were included in this retrospective study. RESULTS: Patients were divided into 2 groups: group A, where the stomach specimen was directly formalinfixed and sent to the pathologist, and group B, where lymph nodes were picked up after surgery and fixed for separate stations. Sixty-two point three percent of group A patients showed 16 retrieved lymph nodes compared to 19.4% of group B(P 0.0001). Group B(separate stations) patients had significantly higher survival rates than those in group A [46.1 mo(95%CI: 36.5-56.0) vs 27.7 mo(95%CI: 21.3-31.9); P = 0.0001], independently of T or N stage. In multivariate analysis, group A also showed a higher risk of death than group B(HR = 1.24; 95%CI: 1.05-1.46).CONCLUSION: Separate lymphatic station dissection increases the number of retrieved nodes, leads to better tumor staging, and permits verification of the surgical dissection. The number of dissected stations could potentially be used as an index to evaluate the quality of treatment received.     

hu-PBL-SCID小鼠体内人淋巴细胞状况

参照人的T细胞分离方法用于猪T细胞分离,经二次绵羊红细胞分离的T细胞,用PHA从功能上鉴定获得纯度很高的T细胞,能进一步用于有关T细胞方面研究。     

Use of separate single-tooth implant restorations to replace two or more consecutive posterior teeth: a prospective cohort study for up to 1 year

PURPOSE

The aim of this study was to evaluate the periodontal and prosthodontic complications of multiple freestanding implants in the posterior jaws for up to 1 year of function.

MATERIALS AND METHODS

Eight patients received 20 implants posterior to canines. Two or more implants were consecutively inserted to each patient. Single crowns were delivered onto the implants. Marginal bone loss, implant mobility, probing depth, and screw loosening were examined to evaluate the clinical success of such restorations for maximum 1 year of functional loading.

RESULTS

All the implants performed well during the observation period. Neither periodontal nor prosthodontic complications were found except a slight porcelain chipping. While the marginal bone level was on average 0.09 mm lower around the implant after 6 months of loading, it was 0.15 mm higher after 1 year.

CONCLUSION

Within the limits of this investigation, separate single-tooth implant restorations to replace consecutive missing teeth may clinically function well in the posterior jaw.     

离子交换和硅胶柱色谱在化纤油剂剖析中的应用

本文介绍用离子交换法分离涤纶短纤维油剂、涤纶高速纺油剂、涤纶帘子线油剂、锦纶帘子线油剂、丙纶纤维油剂的、离子性和非离性成分,用15—20g青岛硅胶(200—300目)色层分离1500—2000mg油剂的非离子性成分;改进了醇溶液中环乙烷加成物的鉴定方法。     

多纤维神经放电信号中不同形状动作电位的分类

在多纤维放电记录中,放电波形存在着不同程度的叠加,本文就是运用计算机,依据形态和幅度比较的方法对其进行了分离。因为分离比较时不是单靠放电的某一特征,而是包含了峰值、波宽、面积等诸多要素在内,所以使得分离结果更加确切,且符合实际。本方法可望成为生理学分析研究神经纤维放电的有力手段。     

承德地区357例浅部真菌病的病原菌分析

对1999年～2003年我院门诊的357例浅部真菌病的真菌分离培养结果显示,本地区浅部真菌病的致病菌种主要为须癣毛癣菌。     

Determining chorionicity and amnionicity in twin pregnancies: Pitfalls

Although the accuracy of chorioamnionicity determination in multiple pregnancy is nearly 100%, some pitfalls do exist. These pitfalls may arise from some confusing sonographic appearance or because of certain rare variations of twinning going against the general principles. Pitfalls in chorionicity determination include (1) the disappearance of the twin peak sign with the regression of chorion frondosum and thinning of the intertwin membrane with advancing gestation; (2) fake twin peak sign because of other structures creeping into the intertwin membrane-placental junction; (3) intrauterine septum or synechia being mistaken as a thick intertwin membrane; (4) bipartite placenta in monochorionic twin being misinterpreted as two separate placentas of dichorionic twin; (5) erroneous fetal sex determination in sex chromosome mosaicism, monogenic disorders, and malformed genitalia in one fetus; and (6) rare twinning types such as dizygotic monochorionic twin and sesquizygotic twin. Pitfalls in amnionicity determination are (1) the lack of correlation between the number of yolk sacs and amnionicity and (2) failure to visualize the intertwin membrane because of technical issues.     

半叶马尾藻多糖的分离纯化与光谱分析

本文对半叶马尾藻多糖采用水提醇沉法粗提，蛋白酶联合Sevag法去蛋白纯化，凝胶过滤柱层析分离得半叶马尾藻纯多糖的不同组分，溴化钾压片红外光谱测定和紫外光谱扫描鉴定分析。结果表明，SHP的苯酚-硫酸呈色反应呈阳性，茚三酮反应呈弱阳性，碘-碘化钾反应呈阴性，说明提取物为非淀粉性多糖。SHP的提取率为8．56％，总糖含量为90．96％。凝胶过滤柱层析结果表明，半叶马尾藻多糖中含有吡喃多糖、木聚糖、半乳糖、阿拉伯糖、葡萄糖、鼠李糖和果糖等。紫外扫描结果显示多糖几乎不含核酸和蛋白质；红外光谱显示SHP主要为吡喃多糖，并显示多糖分子结构中存在β2糖苷键，还存在α-D-半乳吡喃糖的特征吸收峰。     

两种不同方法检测儿童肺炎支原体感染的对比分析

目的比较血清肺炎支原体抗体ELISA检测和间接血凝试验法,探讨肺炎支原体感染实验室诊断的高性价比方法。方法 2013年12月至2015年1月湖南省儿童医院儿科收治住院的支气管肺炎患儿352例,取患儿呼吸道分泌物及血清进行ELISA检测和间接血凝试验,并且对血清进行分离培养,以分离培养作为检测的金标准,比较ELISA检测和间接血凝试验的诊断效果。结果间接血凝实验法的灵敏度为97.5%(159/163),显著高于ELISA检测法86.5%(141/163),差异有统计学意义(P0.05);ELISA检测法的特异度为91.5%(173/189),显著高于间接血凝法70.9%(134/189),差异有统计学意义(P0.05)。ELISA检测法诊断效率为89.2%,Kappa指数为0.782,间接血凝试验法诊断效率为83.2%,Kappa指数为0.670。两组方法诊断效率相近,Kappa指数呈中高度一致。结论 ELISA检测和间接血凝实验法各有优势,实验室可按照临床诊断要求选择合适的方法进行检测。