School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China.
Shanghai Engineering Research Center of Intelligent Addiction Treatment and Rehabilitation, Shanghai, China.
Artif Organs. 2022 Dec;46(12):2391-2399. doi: 10.1111/aor.14369. Epub 2022 Jul 28.
Artificial organs are playing an increasingly important role in medical field. Artificial anal sphincter, as an example, is a widely used medical device for fecal incontinence. Though it could help patients maintain continence, the issue of perception reconstruction is still unsolved, which means that patients cannot control defecation as desired.
In this paper, a novel sensor system based on vector similarity has been analyzed and evaluated. The sensor system is a self-packaged strain gauge sensor with a small size 14.5 mm × 6 mm, especially for medical device implanted in body to reconstruct perception function. In order to overcome the disadvantages of single threshold judgment, a more accurate and reliable judgment standard for content pressure detection in rectum is developed by using vector similarity method. Therefore, in the novel sensor system, standard multi-parameters are comprehensive considered. Furthermore, weight-optimization of sensors are investigated since each sensor has played a different role in detection. Finally, sensor calibration, in vitro and in vivo experiments are established.
In sensor calibration, the result R > 0.99 presents the strain gauge pressure sensor has a good linearity. After that, a series of in vitro experiments have been conducted. The optimized sensor system shows a high accuracy rate in perception reconstruction, which is 87.5% on early warning and 95% on the alarm. In the following in vivo experiments. The results indicate that the average accuracy of the proposed perception reconstruction module has increased by 17.7%, compared with that without optimized sensor system.
All of these have proven that the novel perception reconstruction module with sensor system based on vector similarity is more acceptable and reliable.
人工器官在医学领域发挥着越来越重要的作用。人工肛门括约肌就是一个广泛应用于治疗大便失禁的医疗器械。虽然它可以帮助患者保持便控能力，但感知重建问题仍未得到解决，这意味着患者无法按照自己的意愿控制排便。
本文分析和评估了一种基于矢量相似性的新型传感器系统。该传感器系统是一种自封装的应变计传感器，尺寸小巧，为 14.5mm×6mm，特别适用于植入体内的医疗设备，以重建感知功能。为了克服单一阈值判断的缺点，本文采用矢量相似性方法开发了一种更准确、可靠的直肠内容物压力检测判断标准。因此，在新型传感器系统中，综合考虑了标准多参数。此外，还研究了传感器的权重优化，因为每个传感器在检测中都发挥了不同的作用。最后，建立了传感器校准、体外和体内实验。
在传感器校准中，结果 R > 0.99 表明应变计压力传感器具有良好的线性度。之后，进行了一系列体外实验。优化后的传感器系统在感知重建中表现出较高的准确率，早期预警准确率为 87.5%，报警准确率为 95%。在随后的体内实验中，结果表明，与没有优化传感器系统的感知重建模块相比，所提出的感知重建模块的平均准确率提高了 17.7%。
所有这些都证明了基于矢量相似性的新型感知重建模块和传感器系统更具可接受性和可靠性。
