Table 2 Area and perimeter of stomas in the deformed geometry when an intraabdominal pressure of \(P=20\) kPa is applied. The percentage of increase with respect to the undeformed geometry is also included. Note that in the undeformed geometry the diameter of the stoma is 2 cm, the area is therefore \(3.14\ \hbox {cm}^2\) and the perimeter is 6.28 cm. In all cases, the dimensions of the deformed trephines were measured at the innermost surface of the abodminal wall.
From: Virtual simulation of the biomechanics of the abdominal wall with different stoma locations
Stoma | Area of the deformed stoma (\(\hbox {cm}^2\)) | \(\%\) increase in area | Perimeter of the deformed stoma (cm) | \(\%\) increase in perimeter |
|---|---|---|---|---|
\(s_0\) | 3.76 | 20 | 6.93 | 10 |
\(s_{11}\) | 3.59 | 14 | 6.88 | 9 |
\(s_{12}\) | 3.64 | 16 | 6.96 | 11 |
\(s_{13}\) | 4.18 | 33 | 7.56 | 20 |
\(s_{14}\) | 4.18 | 33 | 7.46 | 19 |
\(s_{15}\) | 4.25 | 35 | 7.45 | 19 |
\(s_{16}\) | 4.07 | 30 | 7.30 | 16 |
\(s_{21}\) | 4.75 | 51 | 7.76 | 23 |
\(s_{22}\) | 4.82 | 53 | 8.05 | 28 |
\(s_{23}\) | 5.37 | 71 | 8.70 | 38 |
\(s_{24}\) | 5.58 | 78 | 9.00 | 43 |
\(s_{25}\) | 4.34 | 38 | 7.56 | 20 |
\(s_{26}\) | 3.93 | 25 | 7.14 | 14 |
\(s_{31}\) | 4.28 | 36 | 7.50 | 19 |
\(s_{32}\) | 5.82 | 85 | 9.05 | 44 |
\(s_{33}\) | 4.34 | 38 | 7.59 | 21 |
\(s_{34}\) | 4.91 | 56 | 8.09 | 29 |
