【摘要】 男性下尿路的控尿功能由内外括约肌实现,为了研究内外括约肌主动力作用下尿道压力分布,建立一种包含肌肉主动力的下尿路生物力学仿真模型.下尿路几何模型由中年男性人体火棉胶切片图像重建;肌肉模型由被动非线性黏弹性实体单元和Hill主动单元共节点耦合.对内外括约肌模型在主动力作用下进行主动收缩的生物力学仿真计算.结果表明:仿真得到最大尿道压力在临床测量的值域内,该模型可以用在下尿路流固耦合分析中,为研究尿失禁成因提供理论依据.更多还原

【Abstract】 The urinary control function of the male lower urinary tract is realized by the internal and external sphincters.In order to study the pressure distribution of the lower urinary tract under the action of the internal and external sphincters,a biomechanical simulation model of the lower urinary tract including the active muscle force was established.The geometric model of the lower urinary tract was reconstructed with the section images of colloidal tissue of middle-aged men.The muscle model was coupled with passive nonlinear viscoelastic solid element and Hill active element.The internal and external sphincter models were simulated under the active muscle contraction.The results show that the maximum urethral pressure obtained in simulation is within the range of clinical measurement.This model can be used in the fluid-solid coupling analysis of the lower urinary tract and thus provide some theoretical basis for the study of the causes of urinary incontinence.更多还原