Zan P, Yang B, Zhang J Y, Shao Y
Department of Automation, College of Mechatronics Engineering and Automation, Shanghai University, Shanghai, PR China.
J Med Eng Technol. 2010 Oct-Nov;34(7-8):386-92. doi: 10.3109/03091902.2010.500348. Epub 2010 Jul 23.
This paper discusses a novel artificial anal sphincter with sensor feedback for controlling anal incontinence. The artificial anal sphincter system is a novel hydraulic-electric muscle which mainly comprises an artificial anal sphincter, a wireless power supply subsystem, and a communication subsystem. High integration of all functional components and no wire linking to the outer device make surgical implantation easier and lower risk. The wireless power supply subsystem employs a Class-E power amplifier based on adaptive control technique, and the electromagnetic compatibility in biological tissue is analysed. With the goal of designing a reliable and safe instrument, the models of human colonic blood flow and rectum motion are developed, the biomechanical material properties of human rectum and tissue ischaemia are analysed. The results show that the deformation of the artificial anal sphincter can be controlled by the press of reservoir below the upper limit of human tissue ischaemia. In vitro experiments demonstrate the artificial anal sphincter system is a good cure for human anal incontinence problems.
本文讨论了一种用于控制大便失禁的具有传感器反馈的新型人工肛门括约肌。人工肛门括约肌系统是一种新型的液压电动肌肉，主要由人工肛门括约肌、无线供电子系统和通信子系统组成。所有功能部件的高度集成以及与外部设备无电线连接，使得手术植入更容易且风险更低。无线供电子系统采用基于自适应控制技术的E类功率放大器，并分析了生物组织中的电磁兼容性。以设计可靠且安全的仪器为目标，建立了人体结肠血流和直肠运动模型，分析了人体直肠的生物力学材料特性和组织缺血情况。结果表明，在人体组织缺血上限以下，通过贮液器压力可控制人工肛门括约肌的变形。体外实验表明，人工肛门括约肌系统是治疗人类大便失禁问题的良好方法。
