Methods: We statistically correlated preoperative and intraoperative
observations on 193 shoulder arthroplasty revisions that were performed because of pain, loosening, or stiffness with the results of a Propionibacterium acnes-specific culture protocol. Regression models were used to identify factors predictive of a positive culture for Propionibacterium acnes.
Results: One hundred and eight of the 193 revision arthroplasties were associated https://www.selleckchem.com/products/sbe-b-cd.html with positive cultures; 70% of the positive cultures demonstrated growth of Propionibacterium acnes. The rate of positive cultures per shoulder increased with the number of culture specimens obtained from each shoulder. Fifty-five percent of the positive cultures required observation for more than one week. Male sex, humeral osteolysis, and cloudy fluid were each associated with significant increases of >= 600% in the likelihood of obtaining a positive Propionibacterium acnes culture. Humeral loosening, glenoid wear, and membrane formation were associated with significant increases of >300% in the likelihood
of obtaining a positive Propionibacterium acnes culture.
Conclusions: Preoperative and intraoperative factors can be used to help to predict the risk of a positive culture for Propionibacterium acnes. This evidence is clinically relevant to decisions regarding prosthesis removal or retention and the need for immediate antibiotic therapy at the time of revision shoulder arthroplasty before the culture results become available.”
“Individual Selleck PF-2341066 tin oxide (SnO(2)) nanowire and three-dimensional (3D) branched SnO(2) nanowires decorated with Au nanoparticles are investigated as the substrates for surface-enhanced Raman scattering (SERS) application. Rhodamine B, isothiocyanate with a concentration of 1.0 mu M/1 can be easily detected due to the localized surface plasmon resonance of the Au nanoparticles
on the SnO(2) nanowire. The SERS enhancement factors of the individual Au-coated nanowire and 3D branched SnO(2) nanowires are estimated to be 1.1 x 10(7) and 1.0 x 10(7), respectively. The high SERS activity of the 3D branched SnO(2) nanowires is due to the plentiful Au droplets and the formation of lots of “”hot spots”" in regions between adjacent Au droplets on tips of the branches. (C) 2009 American Institute of Physics. [doi:10.1063/1.3264669]“
“Background: GW786034 mw Bioabsorbable unfilled synthetic nerve conduits have been used in the reconstruction of small segmental nerve defects with variable results, especially in motor nerves. We hypothesized that providing a synthetic mimic of the Schwann cell basal lamina in the form of a collagen-glycosaminoglycan (GAG) matrix would improve the bridging of the nerve gap and functional motor recovery.
Methods: A unilateral 10-mm sciatic nerve defect was created in eighty-eight male Lewis rats. Animals were randomly divided into four experimental groups: repair with reversed autograft, reconstruction with collagen nerve conduit (1.