Microbiology of Periprosthetic Hip and Knee Infections in Surgically Revised Cases from 34 Centers in Mainland China.

Background And Aim: Periprosthetic joint infection (PJI) is one of the most devastating complications after total joint arthroplasty (TJA). However, the antibiotic resistance of infecting pathogens can significantly vary in different parts of the country. In the current study, we analyzed the demographic and microbiological profiles of knee and hip PJI over three years and compared the microbiological differences between them.

Medium-Term Clinical Results of High-Flexion Knee Prostheses in Patients with Rheumatoid Arthritis.

Objective: This study was performed to evaluate the function and satisfaction outcome of patients with rheumatoid arthritis (RA) who underwent total knee arthroplasty (TKA) with high-flexion prostheses.

Materials And Methods: Twenty-two patients (35 knees) using high-flexion prostheses (Zimmer, Warsaw, IN) were followed up for a period of 7-11 years from February 2007 to December 2009. Clinical and radiographic follow-up was performed using Hospital for Special Surgery (HSS), Short-Form 36 scores (SF-36), American Knee Society score (KSS), and Knee Society Total Knee Arthroplasty Roentgenographic Evaluation and Scoring System.

[Spatial distributions and environmental control of diatom functional groups in sediments of Haixi Lake, Southwest China.].

Functional group classification based on the morphological, physiological and ecological characteristics of diatoms is advanced in describing the tolerance and sensibility of diatoms to environmental stressors. In this study, we examined the spatial distribution of diatom functional groups in surface sediments of Haixi Lake and explored the relationships between diatom distributions and environmental variables using multivariate analyses. Principal components analysis (PCA) and redundancy analysis (RDA) results showed that water depth and total nitrogen (TN) were the key drivers for the heterogeneous distribution of diatom functional groups.

[Spatial distribution of cladoceran assemblages in surface sediments of shallow lakes in Yunnan.].

Shallow lakes, sensitive to environmental changes due to low environmental carrying capacity, generally experience decreases in ecosystem function and even regime shifts after over-exploitation. Surface sediments of 18 shallow lakes in Yunnan were collected and analyzed to identify the spatial pattern and the influencing factors of cladoceran communities. The results showed that there was significant heterogeneity in the spatial distribution of cladocera in those lakes.

Bottom-Up Electrodeposition of Large-Scale Nanotwinned Copper within 3D Through Silicon Via.

This paper is the first to report a large-scale directcurrent electrodeposition of columnar nanotwinned copper within through silicon via (TSV) with a high aspect ratio (~4). With this newly developed technique, void-free nanotwinned copper array could be fabricated in low current density (30 mA/cm²) and convection conditions (300 rpm), which are the preconditions for copper deposition with a uniform deep-hole microstructure. The microstructure of a whole cross-section of deposited copper array was made up of (111) orientated columnar grains with parallel nanoscale twins that had thicknesses of about 22 nm.

Incorporation of Efficient Second-Order Solvers Into Latent Factor Models for Accurate Prediction of Missing QoS Data.

Generating highly accurate predictions for missing quality-of-service (QoS) data is an important issue. Latent factor (LF)-based QoS-predictors have proven to be effective in dealing with it. However, they are based on first-order solvers that cannot well address their target problem that is inherently bilinear and nonconvex, thereby leaving a significant opportunity for accuracy improvement.

Prevalence and risk factors for diabetic retinopathy: the Beijing Communities Diabetes Study 6.

Background: To examine prevalence and associated factors of diabetic retinopathy in patients with Type 2 diabetes mellitus in urban communities of Beijing.

Methods: The community health care center-based study included subjects with diabetes mellitus and an age of 20 years to 80 years, who were recruited from 15 community health centers in urban Beijing. Diabetes mellitus was defined using the World Health Organization criteria.

[Anterolateral minimally-invasive total hip arthroplasty: a clinical comparative study of 110 cases].

Objective: To explore the indications and key points of anterolateral minimally-invasive total hip arthroplasty.

Methods: 110 baseline indexes matched patients admitted for unilateral total hip arthroplasty were randomly assigned to 2 equal groups to undergo surgery through a short anterolateral incision of < or = 10 cm or a standard posterolateral incision. All operations were done by the same surgeon.

Orthopedic trauma of limbs associated with vascular injuries.

Objective: To evaluate the treatment for patients with major vascular injuries associated with traumatic orthopedic injuries.

Methods: A total of 196 patients, aged from 4-67 years with the mean age of 29.88 years, had major vascular injuries associated with traumatic orthopedic injuries and were treated in our hospital in a period of 44 years.

Biomechanical effect of major extremity vessels in choosing repair methods for peripheral artery injury.

Objective: To investigate the biomechanical effect of major extremity vessels to choose appropriate repair methods for vascular injuries of the extremities.

Methods: The data of 385 patients (337 males and 48 females, aged 18-71 years, mean=32.6 years) including 403 injured vessels, who suffered from vascular injuries of the extremities and were treated in our hospital from October 1960 to August 2005, were studied retrospectively in this article.

Amelioration of osteoarthritis by intra-articular hyaluronan synthase 2 gene therapy.

Osteoarthritis (OA) is a chronic, degenerative disorder of multifactorial aetiology, characterized by loss of articular cartilage and periarticular bone remodelling. Goals of managing OA include controlling pain, maintaining and improving function and health-related quality of life, and limiting functional impairment. Although several managements had been proved to ameliorate the symptoms of osteoarthritis, no methods could cure it thoroughly.

Morphological changes of roof of subacromial bursa in patients with rotator cuff tear.

Objective: To investigate the morphological changes of the roof of the subacromial bursa (SAB) and its involvement extent after rotator cuff tear.

Methods: In the experimental group, the roof of SAB was obtained from 30 cases of rotator cuff tear both at the tear site and a site 2.5-3.

[Construction and identification of recombinant adenovirus vector containing Tet-on adjustable NT3 and BDNF genes].

Aim: To construct Tetracycline(tet) inducible recombinant adenovirus vectors containing human neurotrophin 3(NT3) and brain-derived neurotrophic factor(BDNF) genes, respectively and perform PCR and restrictive enzyme digestion analysis.

Methods: Full length NT3 and BDNF cDNAs were subcloned into pIND vector, followed by being cloned into pTRE-shuttle2 vector. The NT3 and BDNF gene fragments resulted from the pTRE-shuttle2-NT3 and pTRE-shuttle2-BDNF digested with I-Ceu I and PI-Sce I were linked to the linear adeno-X virus DNA.

Expression of adenovirus-mediated neurotrophin-3 gene in Schwann cells of sciatic nerve in rats.

Objective: To investigate the expression of neurotrophin-3 (NT-3) gene in Schwann cells of rat sciatic nerve introduced by an adenovirus vector in vivo.

Methods: A recombinant adenovirus vector for NT-3 (Ad-NT-3) was propagated in 293 packaging cells and titered with tissue culture infectious dose(50) (TCID(50)). Ad-NT-3 was injected directly into the rat sciatic nerve after transection and immediate repair.

[Effects of simulated weightlessness on pressure-volume relationships of femoral vein of New Zealand Rabbits].

Objective. To observe the changes of pressure-volume relationships of rabbit femoral veins and their structural changes caused by simulated weightlessness. Method.