Childbirth-related injuries are one of the main causes of pelvic floor dysfunction. To attempt to avoid serious tears during delivery, an episiotomy can be performed. In this study, we intended to investigate the biomechanical performance of the pelvic floor muscles after performing different episiotomies using a physics-based computational model which includes the pelvic floor muscles and the fetus. Previous biomechanical studies have analysed the mechanical effects of single incisions of different lengths; in this study, we intend to analyse the implications of multiple small incisions, evaluating the reaction forces, the stress on the muscles and the loss of tissue integrity sustained by the pelvic floor. The obtained results predict that an episiotomy delivery reduces the likelihood of macroscopic levator trauma by decreasing the stress on the region of insertion of the rectal area of the levator ani in the symphysis pubis. From the mechanical point of view, multiple incisions do not bring benefits compared to larger incisions. However, nothing can be ascertained about the clinical benefit of such an approach.

中文翻译：

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会阴切开术：正常阴道分娩期间多个小切口的生物力学影响。

与分娩有关的伤害是骨盆底功能障碍的主要原因之一。为了避免分娩时出现严重的眼泪，可以进行会阴切开术。在这项研究中，我们打算使用包括骨盆底肌肉和胎儿在内的基于物理的计算模型，对不同的解剖方法进行研究后，研究骨盆底肌肉的生物力学性能。以前的生物力学研究已经分析了不同长度的单个切口的机械作用。在这项研究中，我们打算分析多个小切口的影响，评估反作用力，肌肉压力以及骨盆底所承受的组织完整性的丧失。获得的结果预测，会阴切开术递送通过减小耻骨联合中肛提肌的直肠区域的插入区域上的应力而减小了宏观提肌损伤的可能性。从机械角度来看，与较大的切口相比，多个切口不会带来任何好处。然而，无法确定这种方法的临床益处。