Here is an interesting article looking at the trends in patenting of new mesh products. Besides offering a view of where the industry focus is, it is a comprehensive collection of various mesh designs.
The 2nd paragraph in the Conclusion shows where much of the focus has been. It is very much like a typical manufacturing process, finding more economical ways to make and deliver the product.
Surgical procedures, as well as physicochemical and mechanical properties of surgical meshes, have evolved since the introduction of the first generation mesh. However, the majority of the meshes available on the market are still made of PP. These meshes can contract over time and cause an intense immune reaction, due to their inert biological nature and textile mesh construct. Filament size, arrangement, and mesh porosity are the key design features that influence the mechanical properties of the meshes and body response. Various strategies aimed at optimizing the chemical, physical, and surface properties of the meshes have been proposed, but the ideal mesh that perfectly addresses all of the needs is yet to be established.
Moreover, the review revealed that a strong emphasis has been placed on the design of the prosthetic meshes to ease their surgical implantation, placement, and fixation. A number of inventions are aimed at improving the handling and positioning of the meshes and facilitating their rapid, easy, and safe surgical implantation, as well as supporting laparoscopy procedures.
New mesh designs are being developed to overcome the limitations and complications associated with the first and second generation meshes. In this review, only one patent using tissue engineering-based strategies to repair hernia was identified. The patents presented in this review have primarily focused on addressing the issues related to mesh shrinkage, adhesion formation, and infection.”
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