Virtual Prototype Design And Performance Research Of Urination Assist System Driven By Ultrasonic-vaporized Steam

So far, there is no effective treatment method for bladder voiding dysfunction which is caused by the damage of central nerve of human control micturition. In clinical application, taking abdominal pressure, urethral intubation and drainage, bladder colostomy auxiliary micturition measures are used to assist urination, but they are easy to cause complications such as urinary tract infections. To solve the problem of urine in patients with neurogenic bladder dysfunction, in the early, there is a literature that put forward a kind of urination assist system driven by ultrasonic-vaporized steam. The way of the system auxiliary bladder urination is by ultrasonic heating and thermal conversion method.To analyze the performance of urination assist system driven by ultrasonic-vaporized steam, the mathematical model and AMESim simulation model of the system were built using ultrasonics, thermodynamics and fluid mechanics theories and were verified in a simulated test system. The simulation analysis of the influence of the ultrasonic control parameters on the driver characteristics and urine flow rate performance of the system were conducted. The results show that the driving pressure and urine flow rate are mainly affected by ultrasonic sound intensity, frequency, irradiation time, as well as working medium parameters. Increasing the sound intensity, frequency or radiation time can improve the driving pressure and urine flow rate, and improve the dynamic characteristics of urination.In order to further study the internal fluid flow field distribution of driving capsule and bladder, this paper applied the virtual prototype technology. Based on the Fluent software, combined with the geometric model established in Pro/E software and the data from AMESim simulation analysis, this paper established the virtual prototype. The simulation analysis of the internal fluid flow field distribution of driving capsule and bladder were conducted. The results show that in the process of urination, there are the vortex in the driving capsule and bladder, which resulted in a fluid resistance and energy consumption, and reduced the mechanical efficiency of driving capsule bladder urination. The research work can provide the theoretical guidance for the performance analysis and structure design of urination assist system driven by ultrasonic-vaporized steam.It not only can provide guidance to design a new type of auxiliary urination device, and also can be referenced for the reasonable design of biomedical devices which is suitable for human body.