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Tension-free repair with meshes both reduces the discomfort of the patient after the surgery and decreases the risk of a re-incur of the hernia, due to that, the most important development at the treatment of hernia is the discovery of the tension-free repair. Whether if with the Open Method or the Closed Method, tension-free repair needs a mesh.
In fact, the utilization of meshes at the repair of hernia is an issue though about nearly 100 years, but the problem was that the ideal mesh material could not be discovered. For this, tissues from the body of the person were used, but it was determined that these are not resistant enough. The secure utilization and production of synthetically obtained materials got possible with the contemporary technology.
What should be attributes of the ideal mesh?
- They should not be affected by the body fluids in the area they are used.
- They should be chemically inert, not enter any reaction but should be permeable, they should allow the development of healthy tissues inside.
- They should not cause a foreign object reaction and not be allergic.
- They should be resistant to mechanical tension. They should be such resistant that they will not tear or explode at sudden increases of the abdomen intern pressures or on effect of external forces. Beside that, they should be such flexible that they will not disturb the patient. The desired form should be obtainable at the production, not tear during cutting and seaming processes at the utilization.
- They should be able to sterilize.
- The price should be affordable and easy to supply.

At present conditions, the mesh production technology achieved such a point that it meets nearly all preconditions and even provide surgeons different choices. The meshes may, regarding the form, produced conforming the anatomic region as a right or left mesh separately or in rectangular sheets of different sizes and formed by the surgeon by cutting during the surgery. Whilst some surgeons use the pre-formed meshes, many surgeons prepare the meshes according to the needs of the patient during the surgery.
No matter if placed with the Open or the Closed Method, pre-formed or in the surgery prepared meshes, tension-free repair operations are very successful anyway. The force behind the success is that the mesh is placed to the inner part of the hole I the abdominal wall. The mesh, placed on the inner side of the abdomen is not affected by constraints from inside towards outside or the increase of pressure.
According to the Pascal Rule an internal placed water impermeable mesh, e.g. a piece of nylon, will prevent that water will leak out due to the hydrostatic pressure.
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