Predictors of Early Complications of Total Shoulder Arthroplasty

The authors hypothesized that age, body mass index (BMI), and medical comorbidities (graded with the Charleson Comorbidiy index [CCI]) could be used to predict early complications after TSA. The authors performed a retrospective review of primary TSAs with a minimum of 90-day follow-up. One hundred twenty-seven patients met the inclusion criteria. Complications occurred in 12 (9.4%) of patients. Major complications occurred in 1 patient (0.8%), medical in 8 (6.3%), and surgical in 4 (3.1%). CCI significantly correlated with complication rates and multivariate regression analysis demonstrated CCI to be the only significant determinant of overall complication rates (P = 0.005) and medical complication rates (P = 0.015). While BMI subgroup did not affect complication rates, transfusion rates, intra-operative blood loss, or operative time, our study may have been underpowered for this variable.     

The Reliability of a Scoring System for Corrosion and Fretting,and Its Relationship to Material Loss of Tapered,Modular Junctions of Retrieved Hip Implants

It has been suggested that corrosion and fretting at the tapered, modular junctions of hip arthroplasties may contribute to implant failure. In this study the reliability of a commonly used peer-reviewed scoring system for visual assessment of corrosion and fretting at these junctions was evaluated. Volumetric material loss at the tapered head surface was measured and associations with the visual scores were investigated. We found that the inter-observer reproducibility and single-observer repeatability of the corrosion scores were substantial using Cohen’s weighted Kappa statistic (k = 0.64–0.71). The reproducibility and repeatability of the fretting scores however were slight to fair (k = 0.18–0.31). Taper corrosion scores were significantly and moderately correlated with the volume of material loss measured (Spearman’s r = 0.59; P < 0.001). We recommend the continued use of this scoring system but it should not be a substitute for measurement of material loss.     

治疗骨质疏松新靶点：辅助T细胞-17

骨质疏松是一种常见疾病,骨质疏松的病因学和发病机制至今还没有被阐明清楚,目前还没有彻底治疗骨质疏松的方法,但是研究疾病的发病机制可以为骨质疏松患者提供全新的治疗方法。最近的研究表明了辅助T细胞（ Th）在骨量丢失（一种系统性的炎症反应）发病机制中可能存在作用。然而,在一些已经发表的文章中,Th1／Th2细胞在调节破骨细胞的功能上存在着争议,这一争议被新近发现的Th17细胞所解决。 Th17是一种新亚型的T细胞,可以选择性的分泌不同的促炎因子,刺激破骨细胞分裂,已经被证实在炎症动物模型中可以加速骨量的丢失。因此Th17细胞会是未来治疗骨质疏松的目标靶点。     

肝脏神经内分泌癌1例

神经内分泌癌又称类癌，多见于胃肠道，支气管等部位，很少见于肝脏，本文报告1例经病理证实的肝脏神经内分泌癌，旨在探讨其景仰学和组织学特点。     

传染病分子生物学实验教学实践与体会

随着生命科学的快速发展,分子生物学在传染病诊断和治疗研究中的作用日益重要。本文针对传染病专科医院分子生物学实验教学特点,以问题为导向的教学方法（PBL）为核心,从更新教学内容、改进教学方法、丰富教学手段及培养科学思维等方面阐述了研究生细胞生物学实验教学改革的实践及体会。