Epidural needle insertion : A large registry analysis.

Background: Dural puncture, paraesthesia and vascular puncture are the most common complications of epidural catheter insertion. Their association with variation in midline needle insertion depth is unknown.

Objective: This study evaluated the risk of dural and vascular punctures and the unwanted events paraesthesia and multiple skin punctures related to midline needle insertion depth.

Synthesis of Biopolymer-Based Precursors for the Formation of Organic-Inorganic Hybrid Materials.

Cellulose acetates can be homogeneously transferred with (3-isocyanatopropyl) triethoxysilane, yielding the corresponding carbamates containing reactive ethoxysilane moieties. The products obtained under different conditions are characterized by liquid and solid-state NMR spectroscopy. A slight hydrolysis in products of high Si-content occurs, which strongly affects the solubility of the polymers.

Risks and Benefits of Ultrasound, Nerve Stimulation, and Their Combination for Guiding Peripheral Nerve Blocks: A Retrospective Registry Analysis.

Background: Ultrasound, nerve stimulation, and their combination are all considered acceptable ways to guide peripheral nerve blocks. Which approach is most effective and associated with the fewest complications is unknown. We therefore used a large registry to analyze whether there are differences in vascular punctures, multiple skin punctures, and unintended paresthesia.

Prolonged Catheter Use and Infection in Regional Anesthesia: A Retrospective Registry Analysis.

Background: Prolonged catheter use is controversial because of the risk of catheter-related infection, but the extent to which the risk increases over time remains unknown. We thus assessed the time-dependence of catheter-related infection risk up to 15 days.

Methods: Our analysis was based on the German Network for Regional Anesthesia, which includes 25 centers.

Psoas Versus Femoral Blocks: A Registry Analysis of Risks and Benefits.

Background And Objectives: Psoas blocks are an alternative to femoral nerve blocks and have the potential advantage of blocking the entire lumbar plexus. However, the psoas muscle is located deeply, making psoas blocks more difficult than femoral blocks. In contrast, while femoral blocks are generally easy to perform, the inguinal region is prone to infection.