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ISSN: 2957-5478
Indexed in: Europub, CNKI, Crossref, Dimensions, Google Scholar
Editor-in-Chief: Haipo Cui
Email: PMD@zentimecorp.com
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Progress in Medical Devices (PMD) is an open-access, peer-reviewed online journal dedicated to the rapid publication of articles about various apparatus, machines, implants, software systems and in vitro reagents, such as medical robotics, catheter devices, minimally invasive devices, as well as medical device design and manufacturing processes. Articles from experts in this field will offer key insight in the areas of clinical practice, advocacy, education, administration, and research of medical devices.

 

PMD aims to show the progress in research, development and clinical use of medical devices that help to improve diagnostic, interventional and therapeutic performance and provide novel information that can be effective in reducing the complexity, lowering cost, or ameliorating adverse results of treatments.

 

Please join us in this open-access endeavor by submitting your high-quality papers for publication in PMD.

Lastest Issue

Design and simulation of lower limb exoskeleton based on online gait generation algorithm

Jiaqing Wang1, Renling Zou1, Hongwei Tan1, Jianchao Sun1, Shi Gu1, Xuezhi Yin

1Department of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200082, China. 2Shanghai Berry Electronic Technology Co., Ltd., Shanghai 200233, China. 

Address correspondence to: Renling Zou, Department of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200082, China. E-mail: zourenling@163.com.

Acknowledgement: This work was supported by the Science and Technology Commission of Shanghai Munici pality (21S31906000); the National Natural Science Foundation of China (61803265) and Medical-industrial cross-project of USST (1022308524). 

DOI: https://doi.org/10.61189/621538dunoyl

Received August 19, 2024; Accepted January 20, 2025; Published March 31, 2025 

Highlights 

● A novel lower limb exoskeleton was designed based on human biomechanics. 

● The positive and inverse kinematic solutions of the exoskeleton were determined using the D-H method and geo metric method, respectively. 

● Geometrical relationships of the exoskeleton linkage members were utilized to derive workspace expressions for different gait stages.  

● The efficacy of the online gait generation algorithm was assessed by providing initial conditions. 

● Simulation experiments were conducted to analyse the dynamic self-balancing capabilities of the exoskeleton during flat walking.

Optimal design and experimental study of Mg alloy electrodes for tissue welding

Juxiao Wang, Lin Mao, Weiwei Fan, Chengli Song

Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Address correspondence to: Lin Mao, Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, NO.516 Jungong Road, Shanghai 200093, China. Tel: +86-21-55572159. E-mail: linmao@usst.edu.cn.

DOI:https://doi.org/10.61189/392182sdzooq

Received December 31, 2024; Accepted February 19, 2025; Published March 31, 2025

Highlights

●Three types of circular electrodes with varying thicknesses were designed to achieve weight reduction, accompanied by support structures for intestinal tissue on both sides.

●The mechanical properties of the three electrode configurations were systematically compared to determine the optimal thickness for welding.

●In vitro tissue experiments successfully welded the tissue, identifying the optimal welding parameters.

Measurement methods for positioning accuracy of multileaf collimators in radiation therapy: A mini review

Yuxi Fang1, Rongguo Yan1, Chunying Jiao2, Yueling Li2, Baolin Liu

1School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. 2Beijing Institute of Medical Device Testing, Beijing 101111, China.

Address correspondence to: Rongguo Yan, School of Health Science and Engineering, University of Shanghai for Science and Technology, No.334, Jungong Road, Shanghai 200093, China. E-mail: yan rongguo@usst.edu.cn.

Acknowledgement: This work was supported by the National Key Research and Development Program (2022YFC2409502). 

DOI: https://doi.org/10.61189/284918qpvynd

Received July 19, 2024; Accepted August 28, 2024; Published March 31, 2025

Highlights 

 ● A comprehensive review of the structure, 3D and 2D views, operational principles, and major manufacturers of multileaf collimators (MLCs) used in radiation therapy. 

 ● Introduction and comparison of three methods for evaluating the positioning accuracy of MLCs: dose film measurement system, Matrixx ionization chamber array, and electronic field imaging system.

Research advances of beamforming algorithms in medical ultrasound systems

Fei Liu1, Haipo Cui1, Fujia Sun2, Shuhao Hou3, Peng Yue

Schools of 1Health Science and Engineering, 2Mechanical Engineering, 3Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China. 4Shanghai Guoyan Medical Device Testing Cen ter Co., Ltd., Shanghai 200000, China. 

Address correspondence to: Haipo Cui, School of Health Science and Engineering, University of Shanghai for Science and Technology, NO.334, Jungong Road, Shanghai 200093, China. Tel: +86 21-55271290, E-mail: hpcui@usst.edu.cn; Fujia Sun, School of Mechanical Engineering, University of Shanghai for Science and Technology, NO.516, Jungong Road, Shanghai 200093, China. Tel: +86 13621773624, E-mail: chinasfj@126.com.

DOI: https://doi.org/10.61189/273582nrnxmc

Received August 12, 2024; Accepted September 11, 2024; Published March 31, 2025

Highlights 

 ● Algorithms such as adaptive beamforming and synthetic aperture technology have significantly improved the quality of ultrasound images. 

 ● New algorithms, such as deep learning, can adapt to more complex signal environments at the expense of real-time performance. 

 ● Combining different algorithms can overcome the limitations of a single algorithm, thereby improving image resolution, contrast, and noise resistance.

Research progress of ankle-foot rehabilitation robots

Hongtao Shen, Qingyun Meng, Mingxia Wei, Jiajia Zha

School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Address correspondence to: Qingyun Meng, School of Health Science and Engineering, University of Shanghai for Science and Technology, Yangpu District, Shanghai 200093, China. Tel: +86-13761813609; E-mail: mengqy@sumhs.edu.cn.

DOI: https://doi.org/10.61189/192898kemezc

Received August 23, 2024; Accepted October 16, 2024; Published March 31, 2025

Highlights

● Three types of ankle-foot rehabilitation robots, categorized by structure, are designed to address different stages of rehabilitation training.

● The development of control methods for rehabilitation robots, including integration of multiple control methods, remains a key area of exploration.

● The combination of artificial intelligence algorithms and rehabilitation robots represents a significant and promising research direction.

Gait prediction for lower limb exoskeleton robots based on real-time adaptive Kalman filtering

Haonan Geng1, Xudong Guo1, Fengqi Zhong2, Haibo Lin1, Guojie Zhang3, Qin Zhang4, Jiaheng Chen1

1School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. 2CloudSemi, Pudong New Area, Shanghai 200120, China. 3LingYuan Iron and Steel CO., LTD, Lingyuan 122500, Liaoning Province, China. 4Medical Engineering Department of Northern Jiangsu People’s Hospital, Yangzhou 225001, Jiangsu Province, China.

Address correspondence to: Xudong Guo, School of Health Science and Engineering, University of Shanghai for Science and Technology, No.516 Jungong Road, Shanghai 200093, China. Email: guoxd@usst.edu.cn.

DOI: https://doi.org/10.61189/164995qvdasw

Received September 29, 2024; Accepted December 3, 2024; Published March 31, 2025

Highlights

● The paper develops a gait prediction control strategy for lower limb exoskeleton robots using a real-time adaptive Kalman filtering algorithm, with public gait data from a Clinical Gait Analysis serving as input.

● The model incorporates motor rotation angle, angular velocity, and angular acceleration as core parameters, calculated based on the principles of uniformly accelerated motion. It achieves gait prediction by initializing parameters, calculating Kalman gain, correcting measurements, and updating the covariance matrix.

● A control strategy guided by normal gait parameters enables the exoskeleton to transition efficiently into the desired motion state during startup and gait phase switching. The system employs a microcontroller and Raspberry Pi as its control core, integrated with Bluetooth communication for effective robot control.

Research progress on intestinal anastomosis technology and related devices

Yilong Chen, Lin Mao, Zijie Zhou, Chengli Song 

Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Address correspondence to: Lin Mao, Shanghai Institute for Minimally Invasive Therapy, School of  Health Science and Engineering, University of Shanghai for Science and Technology, Yangpu District,  Shanghai 200093, China. Tel: +86-21-55572159. E-mail: linmao@usst.edu.cn.

DOI: https://doi.org/10.61189/314845qnicsc

Received January 19, 2025; Accepted February 19, 2025; Published March 31, 2025

Highlights

● Continuous suturing in traditional manual suturing shortens operation time and reduces infection risk. Absorb-  able sutures are preferred for intestinal suturing and anastomosis to minimize foreign body reactions.

● Mechanical anastomosis with linear and circular metal staples offers distinct advantages, while new biodegrad-  able staples demonstrate good performance. 

● Magnetopressure anastomosis, leveraging magnetic attraction, has shown success in specific scenarios, provid-  ing innovative approaches to intestinal anastomosis. 

● Radio frequency energy tissue welding technology enables rapid, seamless intestinal anastomosis, with   fewer complications and holds strong potential for future applications. 

● The support method for intestinal anastomosis, particularly the “degradable internal stent anastomosis” using a   simple support method, shows significant promise in animal studies.

Most Read

Construction and comparative analysis of an early screening prediction model for fatty liver in elderly patients based on machine learning

Xiaolei Cai1*, Qi Sun2*, Cen Qiu2*, Zhenyu Xie1, Jiahao He2, Mengting Tu3, Xinran Zhang2, Yang Liu2, Zhaojun Tan2, Yutong Xie2, Xixuan He1, Yujing Ren1, Chunhong Xue1, Siqi Wang2, Linrong Yuan2, Miao Yu2, Xuelin Cheng4, Xiaopan Li4, Sunfang Jiang4, Huirong Zhu1

1Tangqiao Community Health Service Center, Shanghai 200127, China. 2Shanghai University of Medicine and Health Sciences, Shanghai 201318, China. 3Shanghai DianJi University, Shanghai 201306, China. 4Health Man-agement Center, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, China.*The authors contribute equally.

Address correspondence to: Sunfang Jiang, Health Management Center, Zhongshan Hospital Affiliated to Fudan University, Gate 5 East Campus, No. 179 Fenglin Road, Xuhui District, Shanghai 200032, China. Email: jiang.sunfang@zs-hospital.sh.cn. Huirong Zhu, Tangqiao Community Health Service Center, No.131 Pujian Road, Pudong New District, Shanghai 200127, China. Email: rachel1022@126.com.

DOI: https://doi.org/10.61189/568091unpkqk

Received May 11, 2024; Accepted July 16, 2024; Published September 30, 2024

Highlights

●This study collected three years of physical examination data from older adults in the Tangqiao community of Shanghai, which is more regionally representative.

●The most suitable model for this study was selected from six machine learning models to construct a fatty liver risk prediction model for the elderly.

●This study combines six feature selection algorithms with varying performance to screen the features most rele vant to fatty liver.

Review of methods for detecting electrode-tissue contact status during atrial fibrillation ablation

Mengying Zhan, Jiahao Zhang, Yuqiu Zhou, Qijun Xie, Fangfang Luo, Yu Zhou 

School of Health Sciences and Engineering, University of Shanghai for Science and Technology, Shanghai  200093, China. 

 

Address correspondence to: Yu Zhou, School of Health Sciences and Engineering, University of  Shanghai for Science and Technology, No.516 Jungong Road, Shanghai 200093, China. Tel: +86- 18021042556. E-mail: zhouyu@usst.edu.cn.

DOI: https://doi.org/10.61189/650204jodubt 

Received January 29, 2024; Accepted March 25, 2024; Published September 30, 2024

Highlights

● The effect of electrode-tissue contact force on the efficacy and safety of ablation of atrial fibrillation was reviewed  in detail.

● The existing contact force sensing catheters on the market are compared and introduced.

● Three impedance-related methods for assessing catheter adherence are introduced.

Integrating Traditional Chinese Medicine massage therapy with machine learning: A new trend in future healthcare

Yichun Shen1, Shuyi Wang1, Yuhan Shen1, Hua Xing2

1School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. 2Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai 200080, China.

Address correspondence to: Shuyi Wang, School of Health Science and Engineering, University of Shanghai for Science and Technology, NO.516, Jungong Road, Shanghai 200093, China. E-mail: wangshuyi@usst.edu.cn.

DOI: https://doi.org/10.61189/721472czacxf

Received April 12, 2024; Accepted July 11, 2024; Published September 30, 2024

Highlights

● Machine learning can enhance the individualization of treatment in Chinese massage.

● An intelligent system improves the efficiency of Traditional Chinese Medicine massage therapy.

● The integration of Traditional Chinese Medicine Massage Therapy with machine learning represents a new trend in future healthcare.

Optimization design and performance study of magnesium alloy vascular clamp

Weiwei Fan, Lin Mao, Bojun Liu, Chengli Song

Shanghai Institute for Minimally Invasive Therapy, School of Health Science and Engineering, University of Shanghai for Science and Technology, 200093, China.

Address correspondence to: Lin Mao, School of Health Science and Engineering, University of Shanghai for Science and Technology, No.516 Jungong Road, Yangpu District, Shanghai 200093, China. Tel: +86-21-55572159. E-mail: linmao@usst.edu.cn.

DOI: https://doi.org/10.61189/883654uegazz

Received March 21, 2024; Accepted June 5, 2024; Published September 30, 2024

Highlights

● A V-shaped vascular clamp featuring a locking mechanism and transverse teeth has been developed.

● Comparative analysis of clamps with various inner diameters reveals optimal closure with specific configurations.

● The designed clamp presents superior stress-strain response, robust clamping force, and consistent corrosion resistance.

Analysis of urinary non-formed components at home based on machine learning algorithms

Yifei Bai, Rongguo Yan, Yuqing Yang, Chengang Mao

School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Address correspondence to: Rongguo Yan, School of Health Sciences and Engineering, University of Shanghai for Science and Technology, No.516 Jungong Road, Shanghai 200093, China. E-mail: yanrongguo@usst.edu.cn.

DOI: https://doi.org/10.61189/846307fkxccq

Received April 12, 2024; Accepted July 11, 2024; Published September 30, 2024

Highlights

●The study evaluated five machine learning algorithms in analyzing urinary non-formed components. Among them, the Random Forests model demonstrated the highest accuracy, precision, recall, and F1 score, suggesting its effectiveness in analyzing urinary non-formed components.

●A technological innovation is introduced for home urinalysis, offering the potential to enhance medical efficiency and patient experience.

Advancements in finite element analysis for prosthodontics

Yan Wang, Liwen Chen

School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Address correspondence to: Liwen Chen, School of Health Science and Engineering, University of Shanghai for Science and Technology, No.516 Jungong Road, Yangpu District, Shanghai 200093, China. E-mail: chenlw@usst.edu.cn.

DOI:https://doi.org/10.61189/974215qcjfzk

Highlights

● This paper presents a comprehensive review of the advancements in finite element analysis (FEA) within the field of prosthodontics over the past five years.● It examines the role of FEA in aiding the selection of restorative materials, enhancing prosthetic designs, and in vestigating the dynamic interactions between prostheses and natural dentition.● Integrating FEA findings with clinical practice enhances treatment outcomes and patient satisfaction.

An investigation of upper extremity impedance modeling and sensory thresholds in envelope wave electrical stimulation

Renling Zou1, Yuhao Liu1, Yicai Wu1, Liang Zhao1, Jigao Dai1, Xiufang Hu1, Xuezhi Yin2 

1School of Health Sciences and Engineering, University of Shanghai for Science and Technology, Shanghai, 200000, China. 2Shanghai Berry Electronic Technology Co., Ltd., Shanghai, 200000, China.

Address correspondence to: Renling Zou, School of Health Sciences and Engineering, University of Shanghai for Science and Technology, No.516 Jungong Road, Shanghai 200000, China. E-mail: zou renling@usst.edu.cn.

Acknowledgement: This work was supported by Science and Technology Commission of Shanghai Municipality (21S31906000), the National Natural Science Foundation of China (NSFC) Grant (61803265), and Medical-in dustrial cross-project of USST Grant (1022308524).

DOI: https://doi.org/10.61189/434505lacrsk

Received April 24, 2024; Accepted June 25, 2024; Published December 31, 2024 

Highlights 

 ● This study introduces a novel impedance model for the human upper limb, providing a highly accurate fit be tween frequency and impedance values. 

 ● The newly proposed Voltage Perception Threshold (VPT) method offers a more reliable measure of electrical stimulus sensation, independent of current magnitude and output frequency, compared to the traditional Current Perception Threshold (CPT).

Overview of the current development in Visual-Inertial Systems

Mingxia Wei, Qingyun Meng

School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Address correspondence to: Qingyun Meng, School of Health Science and Engineering, University of Shanghai for Science and Technology, Yangpu District, Shanghai 200093, China. Tel: +86-13761813609. E-mail: mengqy@sumhs.edu.cn.

DOI: https://doi.org/10.61189/521889ygxkmc

Received May 15, 2024; Accepted June 25, 2024; Published December 31, 2024

Highlights

● A comprehensive overview of Visual-Inertial Navigation Systems.● Exploration of key technologies, including image processing methods for visual odometry.

Review of gait prediction of lower extremity exoskeleton robot

Haonan Geng1, Xudong Guo1, Haibo Lin1, Youguo Hao2, Guojie Zhang3

1School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. 2Shanghai Putuo District People’s Hospital, Shanghai 200060, China. 3LingYuan Iron and Steel CO., LTD, Lingyuan 122500, Liaoning Province, China.

Address correspondence to: Xudong Guo, School of Health Science and Engineering, University of Shanghai for Science and Technology, No.516 Jungong Road, Yangpu District, Shanghai 200093, China. Email: guoxd@usst.edu.cn; Youguo Hao, Shanghai Putuo District Central Hospital, No.1291 Jiangning Road, Putuo District, Shanghai, 200060, China. Email: youguohao6@163.com.

DOI: https://doi.org/10.61189/673672yizrwd

Received September 8, 2024; Accepted November 6, 2024; Published December 31,2024

Highlights

●Gait prediction relies on multimodal sensor data, and the acquisition of multimodal information, such as physical sensors and bioelectrical signal sensors, is introduced in order to monitor and analyze the lower limb movement in real time, and provide a data basis for prediction.● The application of machine learning algorithms in gait prediction technology, such as Support Vector Machine, Random Forest, and Back Propagation Neural Network, is reviewed to construct an optimized gait prediction model, which provides effective support for the intelligent control of exoskeleton.● Compared with machine learning algorithms, the article summarizes the researchers’ efforts to extract and un derstand the hidden patterns in gait data by constructing neural network models related to different deep learning algorithms, which are used to improve the accuracy and robustness of gait prediction.

Online recognition method for walking patterns of intelligent knee prostheses based on CNN-LSTM algorithm

Yibin Zhang1, Yan Wang1, Hongliu Yu21School of Medical Devices, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China. 2School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Address correspondence to: Hongliu Yu, School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai city Jungong road 516, Shanghai 200093, China. E-mail: yhl98@hotmail.com.

DOI:https://doi.org/10.61189/961030gznunx

Received June 21, 2024; Accepted November 20, 2024; Published December 31, 2024

Highlights

● In prosthetics, using AI algorithms to identify the fused sensor data as known walking patterns has extremely strong expandability. Moreover, as the learning data continues to expand, the robustness of the model itself also increases accordingly.● There are numerous AI algorithms currently available. The effective utilization of algorithm combination techniques to learn from each other’s strengths can significantly improve the accuracy of identification. The combined model of convolutional neural networks (CNN) and bidirectional long short term memory (LSTM) attempted in this paper has witnessed a significant improvement in its comprehensive recognition rate.● In the practical application of prosthetics, the real-time performance during the mode switching transition period is particularly important as it can reflect the flexibility of the prosthetics. In this paper, the algorithm optimized by the AI model has controlled the delay rate within one gait cycle, greatly enhancing the safety and reliability of pro-sthetics in actual use.