Recently, there has been a trend toward performing hip arthroscopy without a post (postless) in an effort to decrease perineal post-related complications. Previous studies have revealed a variable risk of pudendal nerve neuralgia and perineal soft-tissue injury when using a post. There is emerging evidence that arthroscopic hip procedures can be done without the use of a post, with less traction force on the perineal region, and with adequate exposure to safely accomplish a well-done femoroacetabular impingement corrective procedure. Prospective comparative studies with conclusive evidence of the superiority of either technique, however, are lacking. Complications with a post are likely associated with high traction forces, prolonged traction times, and potentially suboptimal technique and patient positioning. In addition, postless traction is in its infancy and new adverse events/outcomes are likely to emerge. There are likely specific situations and patient populations in which one technique might be superior to the other. We are the carpenters of medicine and rather than blaming our tools and throwing out a technique that has served us well for decades, we should better understand some important pearls and pitfalls that might allow either method to be safely performed.
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http://dx.doi.org/10.1016/j.arthro.2022.11.017 | DOI Listing |
Bio Protoc
January 2025
Laboratoire Interdisciplinaire de Physique (LIPhy), Université Grenoble Alpes, CNRS, Grenoble, France.
Cell-generated forces play a critical role in driving and regulating complex biological processes, such as cell migration and division and cell and tissue morphogenesis in development and disease. Traction force microscopy (TFM) is an established technique developed in the field of mechanobiology used to quantify cellular forces exerted on soft substrates and internal mechanical tissue stresses. TFM measures cell-generated traction forces in 2D or 3D environments with varying mechanical and biochemical properties.
View Article and Find Full Text PDFAnn Thorac Surg Short Rep
June 2024
Department of Pediatric Cardiovascular Surgery, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan.
The endocardial anchoring technique is a novel modification of total anomalous pulmonary venous return repair that involves creation of an L-shaped flap of the pulmonary venous confluence, subsequently anchoring it to the endocardium. A wide and smooth pathway can be expected from the theoretical advantages of this technique, namely, a smooth inner surface of the anchored flap and traction force to extend the orifice of the connection. An application of this technique for a rare variant of supracardiac total anomalous pulmonary venous return suggests its potential to be an alternative to the conventional repair, especially in patients with a curved pulmonary venous confluence.
View Article and Find Full Text PDFPLoS Comput Biol
January 2025
Department of Mechanical Engineering & Materials Science, Washington University, St. Louis, Missouri, United States of America.
Cell collectives, like other motile entities, generate and use forces to move forward. Here, we ask whether environmental configurations alter this proportional force-speed relationship, since aligned extracellular matrix fibers are known to cause directed migration. We show that aligned fibers serve as active conduits for spatial propagation of cellular mechanotransduction through matrix exoskeleton, leading to efficient directed collective cell migration.
View Article and Find Full Text PDFAm J Sports Med
January 2025
Mayo Clinic Arizona Department of Orthopedic Surgery, Phoenix, Arizona, USA.
Background: The Latarjet and other bony augmentation procedures are commonly used to treat anterior shoulder instability in the setting of significant glenoid bone loss. Although several fixation strategies have been reported, the biomechanical strength of these techniques remains poorly understood.
Purpose: To perform a systematic review of the biomechanical strength of glenoid bony augmentation procedures for anterior shoulder instability.
Commun Biol
January 2025
Freie Universität Berlin, Institute for Chemistry and Biochemistry, Thielallee 63, 14195, Berlin, Germany.
Blood vessel formation relies on biochemical and mechanical signals, particularly during sprouting angiogenesis when endothelial tip cells (TCs) guide sprouting through filopodia formation. The contribution of BMP receptors in defining tip-cell characteristics is poorly understood. Our study combines genetic, biochemical, and molecular methods together with 3D traction force microscopy, which reveals an essential role of BMPR2 for actin-driven filopodia formation and mechanical properties of endothelial cells (ECs).
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