This study developed a finite element (FE) model of simulated locking plate fixation to examine the strain response following supracondylar femoral plate attachment and under compressive loading. An implicit FE model of a synthetic femur with a distal fracture gap stabilized with a lateral plate was evaluated following attachment and 500 N loading, considering locking and non-locking proximal screws configurations. Screw pre-tension values of 60 N for both distal and proximal non-locking screws yielded good agreement with plate experimental strain data in attached (unloaded) and loaded conditions. The results highlight the importance of pre-tensioning in modeling plate attachment using non-locking screws.
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http://dx.doi.org/10.1080/10255842.2022.2030730 | DOI Listing |
JBJS Essent Surg Tech
December 2024
Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut.
Background: For complete disruption of the posterolateral corner (PLC) structures, operative treatment is most commonly advocated, as nonoperative treatment has higher rates of persistent lateral laxity and posttraumatic arthritis. Some studies have shown that acute direct repair results in revision rates upwards of 37% to 40% compared with 6% to 9% for initial reconstruction. In a recent study assessing the outcomes of acute repair of PLC avulsion injuries with 2 to 7 years of follow-up, patients with adequate tissue were shown to have a much lower failure rate than previously documented.
View Article and Find Full Text PDFSensors (Basel)
December 2024
Jeanne de Flandre Hospital, Faculté de Médecine, University of Lille, Avenue Eugène Avinée, 59000 Lille, France.
Objective: To develop and validate a device that measures the pressure exerted by forceps on the fetal head for clinical use.
Background: The lack of clinical tools to quantify forceps pressure on the fetal head may impact maternal and neonatal outcomes. Existing studies have not measured the direct contact pressure between forceps blades and the fetal head, highlighting the need for innovation.
Diagnostics (Basel)
November 2024
Division of Emergency and Critical Care Medicine, Department of Acute Medicine, Nihon University School of Medicine, Tokyo 173-8610, Japan.
Background: Acute pancreatitis (AP) severity is correlated with systemic infection incidence in the acute phase, and it is important to assess inflammation during the disease course and to recognize infection at an early stage. As in sepsis, inflammation in AP impairs tissue oxygen metabolism and disrupts microcirculation. We performed a vascular occlusion test (VOT) via near-infrared spectroscopy (NIRS), which noninvasively monitors local oxygen in peripheral tissues, to evaluate tissue oxygen metabolism and blood circulation during the acute AP phase.
View Article and Find Full Text PDFACS Omega
December 2024
Popular University of Chontalpa, Cardenas-Huimanguillo Highway Km. 2.0, Cardenas 86500, Mexico.
Natural nutshell extract was obtained by mechanical compression. The extract was combined with ethanol and a nonionic surfactant, and it was labeled as EES. The EES inhibitor effect on S135 carbon steel, exposed to a simulated marine-coastal environment (SME), was deduced by mass loss measurement, adsorption isotherm, electrochemical measurements, and surface analysis.
View Article and Find Full Text PDFFolia Morphol (Warsz)
December 2024
Department of Clinical Anatomy, Masovian Academy in Plock, Płock, Poland.
The iliopsoas muscle complex traditionally consists of the iliacus muscle and psoas major, occasionally including the psoas minor. These elements were distinguished based on their shared function and common distal attachment. Although accessory structures have been previously reported within the complex, they are rare.
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