Journal of Shanghai Jiao Tong University ›› 2021, Vol. 55 ›› Issue (7): 899-906.doi: 10.16183/j.cnki.jsjtu.2020.199

Special Issue: 《上海交通大学学报》2021年12期专题汇总专辑 《上海交通大学学报》2021年“机械工程”专题

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Low-Power Consumption Design and Optimization of New Artificial Anal Sphincter

YAO Shengjian, YAN Guozheng(), WANG Zhiwu, ZHOU Zerun, JIANG Pingping, DING Zifan, HUA Fangfang, ZHAO Kai, HAN Ding   

  1. Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2020-07-01 Online:2021-07-28 Published:2021-07-30
  • Contact: YAN Guozheng


Based on the hardware of the new artificial anal sphincter system, this paper analyzes the power consumption of each module. After low-power consumption design and reasonable setting of the sampling period, the system power consumption is significantly reduced. At the same time, the area under the rectal pressure waveform is used as the standard for judging defecation willingness. Instead of the single-point pressure threshold method, it provides a basis for anal incontinence patients to go to the toilet, and thus improves the accuracy of the rectal perception function. Combining in vitro and in vivo experiments, the low-power consumption of the artificial anal sphincter designed in this paper can extend the working time of the system to 16 d after a single charge. It increases the working time by 230% with a rectal perception accuracy of 96%.

Key words: artificial anal sphincter, low-power rectal perception, rectal pressure waveform, low-power wake-up, in vivo experiment

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