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Computational analysis of electrical stimulation to promote tissue healing for hernia repair at varying mesh placement planes.
Journal of Biomaterials Applications 2024 April 24
Development of a tear in the abdominal wall allowing for protrusion of intra-abdominal contents is known as a hernia. This can cause pain, discomfort, and may need surgical repair. Hernias can affect people of any age or demographic. In the USA, over 1 million hernia repair procedures are performed each year. During these surgeries, it is common for a mesh to be utilized to strengthen the repair. Different techniques allow for the mesh to be placed in different anatomical planes depending on hernia location and approach. The locations are onlay, inlay, and sublay, with sublay being split into retromuscular or preperitoneal with sublay being the most commonly used. The use of an electrically active hernia repair mesh is of interest to model as electrical stimulation has been shown to improve soft tissue healing which could reduce recurrence rates. Theoretical 3D COMSOL models were built to evaluate the varying electric fields of an electrically active hernia repair mesh at each of the different anatomical planes. Three voltages were chosen (10, 20, and 30 mV) for the study to simulate a low-level electrical signal and the electric field from a piezoelectric material at the tissue layers surrounding the mesh construct. Based on the model outputs, the optimal mesh placement location was the sublay-retromuscular as this location had the highest electric field values in the connective tissues and rectus abdominis muscle, which are the primary tissues of concern for the healing process and a successful repair.
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