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Relevance. The tension of the aponeurosis in surgical treatment of midline hernia occurs when the different ways of hernioplasty. At the same time, the standards of this indicator and limit values date to be determined and therefore not used in herniology. Materials and methods. The article describes the results of experimental biomechanical studies of the white line of the abdomen for 15 non-fixed cadavers. Produced a median laparotomic incision. Selected white line in 12cm above umbilicus and at the same distance below it. Made 6 a longitudinal incision of the aponeurosis at 4cm in length each. Using digital electronic dynamometer, and the pincer mechanism defined force (N) necessary for the closing of the edges of the aponeurosis. Similarly, the measurements are made for three sections the white line of the abdomen length 8cm (above the umbilicus, at the level of the umbilicus and below it), and upper and lower middle sections of 12cm. Accordingly, the obtained parameters the calculated tension forse (N/cm2). Results and their discussion. It was found that the tension in the incision of the aponeurosis above the umbilicus (1,82±0,46 N/cm2) has a statistically higher rate than below the umbilicus (0,96±0.40 N/cm2) with a significance level of p≤0.05. The highest rates were observed in subxiphoidal region (2,66±1.2 N/cm2) and the smallest in the middle third of the lower midline incision (0,68±0.5 N/cm2) (p≤0.01). It is hypothesized that this fact is due to the more horizontal position of the body. On the assumption that the biophysical model of the anterior abdominal wall may be thin-walled cylinder made a mathematical justification of the hypothesis. The estimated change in the tension was 2.4 N/cm2, which is very close to empirical – 2.0 N/cm2. Conclusion. It is concluded that in the horizontal position of the body tension of the aponeurosis in the lower-middle laparotomic wound is smaller than in upper-middle, largely leveled in the orthostasis. Keywords: White line, aponeurosis, tension.

Some Strain Characteristics of the White Lne of the Abdomen in the Median Laparotomic Wound (Experimental Study)