BD Influx流式细胞分选仪参数调试和最佳条件的设定

目的：探索BD Influx流式细胞仪分选细胞亚群的调试参数和最佳设定条件。方法：使用两种质控试剂Rainbow Beads和Accudrop Beads作为实验材料,对BD Influx流式细胞仪的针孔、液流、荧光通道、前向角散射光信号、液滴频率、振幅和液滴延迟等参数进行优化。结果：使用型号为100μm的喷嘴,在液流聚焦清楚、液柱打入废液收集管的正中央、荧光光斑进入针孔中央且最亮、前向角散射（FSC）光光斑进入针孔中央且最亮、断点最高、液流分叉呈稳定的亮点、振幅为5.20＆#177;1.00以及液滴延迟为35.20＆#177;2.00等最佳设定条件下,其细胞样本分选纯度可达99%,工作效率可达95%。结论：流式细胞仪分选参数条件的设定,可为获得高纯度、高活性的细胞提供快速调试方法。     

Evaluation of the Concentration of Selected Elements in Patients with Cancer of the Reproductive Organs with Respect to Treatment Stage—Preliminary Study

(1) Background: The aim of this study was to assess the concentrations of selected elements in female patients with cancer of the reproductive organs, taking into account the stage of treatment. (2) Methods: The study sample consisted of 51 patients with advanced endometrial cancer and ovarian cancer, undergoing chemotherapy. The median age of the studied patients with endometrial cancer was 66.0 years (IQR: from 60.75 to 70.25), and with ovarian cancer―60.0 years (IQR: from 49.0 to 64.0). Each of the qualified women, after consent to participate in the study, had her blood drawn several times (before surgery, the first course of chemotherapy, the third course of chemotherapy, and the sixth course of chemotherapy) in order to determine serum levels of macro- and micronutrients (Na, Mg, Ca, Zn, P, Cu, Fe, Cd, Ni, and Sr). (3) Results: In the study group of patients with cancer of the reproductive tract, the concentrations of iron (<0.001), magnesium (0.038), sodium (0.014), and nickel (0.037) varied significantly over the course of the study. The analysis showed that the interaction between the stage of chemotherapy and the type of cancer had an effect on the concentrations of magnesium and cadmium (p < 0.05). (4) Conclusions: In the studied group of patients with ovarian and endometrial cancer, the applied chemotherapy significantly changed the concentrations of Fe, Na, and Ni, regardless of the type of tumor. Changes in Mg and Cd concentrations resulted from the interaction between the stage of chemotherapy and the type of cancer. The results of serum concentrations of selected elements in women with cancer of the reproductive organs may help understand the physiological changes resulting from the applied chemotherapy.     

下颌无牙颌种植固定修复早期负载的临床观察

目的:评价下颌无牙颌种植固定修复早期负载的可行性和临床疗效。方法:14例下颌无牙颌病例共植入94颗ITISLA种植体,种植体植入后第6周完成固定修复。于植入当天、第4周、修复后1年行影像学检查,观察种植部位牙槽骨吸收情况。在植入即刻及第4周行共振频率分析。结果:种植体1年成功率为100%,修复体的1年成功率为100%。影像学检查示种植体周无低密度影;种植部位牙槽骨水平未见明显吸收,均位于种植体第一螺纹的冠方,从全景片测量得1年牙槽骨水平吸收为(0.3±0.94)mm。共振频率分析显示,植入即刻与第4周分别为69.54±4.29和63.14±5.57。结论:ITI SLA种植体固定修复下颌无牙颌早期负载是可行的。     

3D打印定位导板在辅助制备股前外侧穿支皮瓣中的临床应用

目的:探讨采用3D打印固定式定位导板制取股前外侧穿支皮瓣中定位穿支血管的准确性和可行性。方法:收集2019年1月—2020年12月就诊于新疆医科大学第一附属医院/附属口腔医院口腔颌面肿瘤外科,因口腔颌面部软组织缺损需行股前外侧穿支皮瓣修复重建的患者20例。其中,实验组术前3D打印定位导板,术中定位穿支血管并辅助制取股前外侧穿支皮瓣(n=8);对照组采用常规多普勒超声定位穿支血管并辅助制取股前外侧穿支皮瓣(n=12)。比较2组在皮瓣制取时间、出血量、术后供区外形满意度、下肢功能评定量表(LEFS)评分、穿支血管定位、有无术后皮瓣并发症的差异。采用SPSS 24.0软件包对数据进行统计学分析。结果:皮瓣制取时间、出血量、术后供区外形满意度、定位穿支血管的差异有统计学意义(P<0.01);术后皮瓣并发症、LEFS评分差异无统计学意义(P>0.05)。结论:3D打印固定式定位导板为股前外侧穿支皮瓣穿支血管的定位提供了一种新方法,术中定位血管更准确,提高了手术效率以及患者对术后供区外形恢复的满意度。     

Assessment of Surface Treatment Degree of Steel Sheets in the Bonding Process

The aim of the paper is to determine the influence of the surface treatment on the adhesive properties of steel sheet surfaces and the strength of the adhesive joints of steel sheets. The paper also aims to assess the degree of steel sheets’ surface treatment in the bonding process. Due to the many methods of surface treatment and types of materials, the assessment of the surface treatment method is extremely important in adhesive processes. Two variants of the surface treatment were used: without a paint coating and with a paint coating, divided into two groups (without degreasing and with degreasing). Additionally, in the case of the analysis of the steel samples without the paint coating, mechanical treatment was applied. Two-component epoxy adhesive, prepared on the basis of bisphenol A and a polyamide curing agent, was used to prepare the single-lap adhesive joints of the steel sheets. The tests determined: (i) the adhesive properties of the steel sheets’ surface based on the measurement of the contact angle of polar and apolar liquids (including wettability, work of adhesion, and surface free energy), (ii) surface roughness parameters (PN EN ISO 4287), and (iii) mechanical properties (load capacity and shear strength) of the steel sheets’ adhesive joints (EN DIN 1465). Contact angle measurements of the steel sheet surfaces showed that the polar liquid better reflects the obtained strength results of the analyzed adhesive joints than the apolar liquid. Furthermore, better wettability of the surface of steel sheets with both polar and apolar liquids was obtained for samples whose surface was subjected to degreasing. It can also be concluded that the wettability of the surface can be used as one of the indicators of the degree of the surface treatment for the bonding process.     

单侧特发性声带麻痹神经电刺激治疗后即刻疗效初步观察

目的 探讨单侧特发性声带麻痹喉返神经/喉上神经电刺激治疗后即刻对主观声音改变、声学参数以及动态喉镜观察结果的影响.方法 选取诊断为单侧特发性声带麻痹的患者,回顾性收集其行喉肌电图检查并同期行神经电刺激治疗前后的动态喉镜及嗓音分析检查结果,分析检查及治疗前后主观声音改变,声学参数(jitter、shimmer、DSI、M...     

新型合作医疗定点医疗机构评价体系初探

文章从更好地满足农民医疗需求、有助于提高医疗机构质量和进行有效监管3个方面阐述了建立定点医疗机构评价体系的必要性，然后对评价体系的内容进行了初步的探讨，提出了医疗机构定点的2种模式、评价的主要内容和评价体系的运作的方式，为建立新型合作医疗定点医疗机构评价体系、促进新型合作医疗的可持续发展提供了一种思路。     

Test and Microstructural Analysis of a Steel Slag Cement-Based Material Using the Response Surface Method

In this study, the silica fume replacement rate, fly ash replacement rate, and curing temperature were regarded as the independent variables, and the compressive and flexural strengths were regarded as the response values. The response surface method was used to construct the response surface polynomial regression model and obtain the optimal preparation parameters of a steel slag cement-based gel slurry (SCGS). The univariate and multivariate effects on the SCGS’s strength were investigated via analysis of variance and a three-dimensional surface model, and the hydration products and strength development law were characterized via scanning electron microscopy and X-ray diffraction. The actual compressive strengths at 3 and 28 d of age were 31.78 and 53.94 MPa, respectively, which were close to the predicted values (32.59 and 55.81 MPa, respectively), demonstrating that the optimized strengths were accurate and reliable. Further, the hydration reaction rate of SiO₂ in the silica fume and the physical filling effect of the inert components of fly ash and steel slag under the optimal parameters were the key factors for the early strength of the material. Moreover, continuous C₃S hydration in steel slag and the continuous excitation of the volcanic ash properties of fly ash were important factors for the later strength.