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Lesch et al. Mini-invasive Surg 2023;7:25 https://dx.doi.org/10.20517/2574-1225.2023.31 Page 3 of 13

Figure 1. (A) Outline of the test bench and its components; 1 - water reservoir, 2 - cover plate for tissue fixation, 3 - top plate with
opening for hydraulic pressure impact, 4 - inlet and outlet pipes and valves, 5 - pressure accumulator. (B) Schematic, labeled illustration
of the function of the bench test. (C) Outline of the prepped defects. (D) Reconstructed tissue during pressure impact with
measurement of the suture tension.

Experimental analysis of the stress limit of the compound of the abdominal wall and reconstruction
materials will provide crucial insights. It can pave the road for successful surgical repair of herniated
abdominal walls. In analogy to current material sciences for solids, it will be possible to measure cyclic load,
strain, and stress in the future for abdominal wall repair.

METHODS
Consideration of influences on the abdominal wall and hernia repair
Various variables influence the simulation of an abdominal wall load. Table 1 points out these variables. A
lifelike test requires a multiaxial pressure load. It represents coughing, lifting, or a Valsalva maneuver. These
three activities differ in the progression of the load on the abdominal wall. They must be distinguished from
lower, chronic pressure elevations [17-19] .

Force can be applied either longitudinally, perpendicularly, or multiaxially. Each load mode can be
described mathematically. Likewise, we must consider the tested compound materials. This paper examines
the potential for different loads and their influence on the loaded structures. We apply the results to our