Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine最新文献_第4页

A proposal to analyze muscle fiber type composition in the soleus muscle of untrained subjects and sprinters using surface EMG signals. 利用表面肌电图信号分析未经训练的受试者和短跑运动员比目鱼肌的肌肉纤维类型组成的建议。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-02-01 Epub Date: 2025-03-04 DOI: 10.1177/09544119251321129

Venugopal Gopinath, Manuskandan Swaminathan Ramakrishnan, Remya R Nair, Ramakrishnan Swaminathan

{"title":"A proposal to analyze muscle fiber type composition in the soleus muscle of untrained subjects and sprinters using surface EMG signals.","authors":"Venugopal Gopinath, Manuskandan Swaminathan Ramakrishnan, Remya R Nair, Ramakrishnan Swaminathan","doi":"10.1177/09544119251321129","DOIUrl":"10.1177/09544119251321129","url":null,"abstract":"Muscle fiber type proportion is a key determinant of fatigue, force generation, and functions of different skeletal muscles. Analysis of muscle fiber type composition aids in the assessment of athletic abilities and individualization of training methods. This study attempts to non-invasively analyze the muscle fiber type composition in the soleus (SOL) of untrained subjects (UT) and sprinters (SP) using surface electromyography-based time-frequency analysis. Signals are recorded from both groups during an isometric calf raise test with loads until fatigue. Filtered signals are segmented into epochs of 1-s duration and processed using a reassigned Morlet scalogram. Four time-frequency features namely averaged frequency, squared frequency bandwidth, averaged time, and squared time duration are extracted from the reassigned distribution and are subjected to linear regression analysis. A fiber-type-specific reassigned profile is noticed for UT and SP reflecting their distinct muscle composition during their non-fatigue and fatigue states. The regression parameters namely slope, intercept, and Adjusted R-square values are higher for the signals of SP indicating their fast-fatigue characteristics. Greater variation of features during fatigue is noticed in the signals of UT compared to SP. Among the features, the squared time duration exhibits the highest significance of p = 8.75E-07 in differentiating the signals of UT and SP during the non-fatigue state. Thus, the proposed approach is found suitable for analyzing the fiber type differences in both subject groups. This work may be further extended in sports biomechanics for studying the fiber-type transformations in muscles due to different athletic training strategies.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"144-154"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143543119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computational study on the effect of thermal deformation of myocardium on lesion formation during radiofrequency ablation. 射频消融过程中心肌热变形对病变形成影响的计算研究。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-02-01 Epub Date: 2025-02-26 DOI: 10.1177/09544119251321131

Pei Xin Niu, Xiang Xiang Wang, Jing Jin Shen, Xiao Xiao Jin, Zhen Yu Zhou

{"title":"Computational study on the effect of thermal deformation of myocardium on lesion formation during radiofrequency ablation.","authors":"Pei Xin Niu, Xiang Xiang Wang, Jing Jin Shen, Xiao Xiao Jin, Zhen Yu Zhou","doi":"10.1177/09544119251321131","DOIUrl":"10.1177/09544119251321131","url":null,"abstract":"Radiofrequency (RF) catheter ablation treats cardiac diseases by inducing thermal lesion of cardiac tissues through radiofrequency energy operating at around 500 kHz. The electromagnetic wavelength is significantly longer than the size of the radiofrequency active electrode, the tissue is heated through resistive heating. During thermal ablation, the coupled thermo-mechanical property of cardiac tissue influencing the contact area between the electrode and tissue plays a crucial role in the formation of thermal lesions, yet the literature often overlooks the effect of thermal deformation. This paper proposes a thermo-hyperelastic constitutive model for myocardium that models thermal contraction and expansion during ablation. Furthermore, a finite element model was established to investigate the effect of the electro-thermo-mechanical coupling property of myocardium on lesion formation under different contact forces. To ensure convergence, we solved the fully coupled electro-thermo-mechanical finite element model using the segregated step method. The computational results demonstrate that thermal deformation, which causes an expansion in the tissue-electrode contact area, increases lesion width and volume, while its influence on lesion depth is negligible. Specifically, after a 30-s ablation under contact forces of 0.1, 0.15, and 0.2 N, the lesion volume increased from 4.53, 7.66, and 10.62 mm3 (without thermo-mechanical coupling) to 5.36, 8.33, and 13.34 mm3 (with thermo-mechanical coupling), respectively. Similarly, the lesion width increased from 2.68, 3.12, and 3.44 mm to 2.78, 3.22, and 3.62 mm. Moreover, both thermal deformation and contact force exert a minimal effect on lesion formation time.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"133-143"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rings in Taylor Spatial Frame: Mechanical testing and finite element analysis. 泰勒空间框架中的环：力学测试和有限元分析。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-02-01 Epub Date: 2025-03-13 DOI: 10.1177/09544119251321128

Ahmad Zamani, Michalis Zenios, S Olutunde Oyadiji

{"title":"Rings in Taylor Spatial Frame: Mechanical testing and finite element analysis.","authors":"Ahmad Zamani, Michalis Zenios, S Olutunde Oyadiji","doi":"10.1177/09544119251321128","DOIUrl":"10.1177/09544119251321128","url":null,"abstract":"Taylor Spatial Frame (TSF) is a type of hexapod external ring fixation system. TSF rings are supplied as half rings, whole full rings and two third rings in different sizes. In this work, these components as well as bolted full rings made of two half rings were tested in compression in two or three directions. Tests were simulated by Finite Element (FE) method using 3D solid elements, which were validated against the experimental results. Load-deflection curves and values for stiffness and ultimate loads are presented for each case from both tests and FE analyses. Load-stiffness curves are also presented for each test. The followings were demonstrated by the results: (1) a significant difference between bolted and whole full rings in their respective stiffness behaviour, the clear advantage being with the whole full rings, (2) a variation in stiffness of bolted rings when loaded across their different diameters, (3) a potential problem in the TSF rings: having the same cross section and thickness, smaller rings are stronger than larger ones, whereas in fact the larger ones ought to be stronger due to patient's weight and that (4) the lowest stiffness was exhibited when a 2/3 ring was loaded parallel to the line joining its open ends.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"165-177"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907730/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143625677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and validation of an automated Trunk Impairment Scale 2.0 scoring system using rule-based classification. 使用基于规则的分类开发和验证自动中继损伤量表2.0评分系统。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-02-01 Epub Date: 2025-02-17 DOI: 10.1177/09544119251317614

Tay Jia Yi, Zaidi Mohd Ripin, Mohamad Ikhwan Zaini Ridzwan, Muhammad Fauzinizam Razali, Yeo Ying Heng, Nur Akasyah Binti Jaafar, Alexander Tan Wai Teng, Hazwani Binti Ahmad Yusof, Muhammad Hafiz Hanafi

{"title":"Development and validation of an automated Trunk Impairment Scale 2.0 scoring system using rule-based classification.","authors":"Tay Jia Yi, Zaidi Mohd Ripin, Mohamad Ikhwan Zaini Ridzwan, Muhammad Fauzinizam Razali, Yeo Ying Heng, Nur Akasyah Binti Jaafar, Alexander Tan Wai Teng, Hazwani Binti Ahmad Yusof, Muhammad Hafiz Hanafi","doi":"10.1177/09544119251317614","DOIUrl":"10.1177/09544119251317614","url":null,"abstract":"The Trunk Impairment Scale Version 2.0 (TIS 2.0) measures the motor impairment of the trunk after a stroke through the evaluation of dynamic sitting balance and co-ordination of trunk movement. Evaluations by physiotherapists depend on their ability in detecting minor changes in motion and observing limb movements and these can be time consuming and reduce their availability for rehabilitation work. An automated scoring system for TIS 2.0 was proposed to provide a more reproducible and standardized alternative to manual physiotherapist assessments. In the development phase, motion data from lay actors simulating stroke condition were collected using video motion capture system OpenCap. This data was utilized to create metrics and establish cut-off values for a rule-based classification. The discriminant abilities of the metrics were evaluated using the area under the curve (AUC). In the testing phase, the performance of the developed system was assessed on 19 stroke survivors (Berg Balance Scale score of 20-55) using both automated system and manual scoring by nine physiotherapists. The discriminant abilities of the features used in the dynamic sitting balance subscale are considered excellent to outstanding (AUC ≥ 0.717), and coordination subscale ranged from poor to outstanding (AUC ≥ 0.667). The automated scores aligned with physiotherapists' scores, achieving an average percentage of agreement 71.1%. The total TIS 2.0 scores generated by the automated method showed moderate correlation with the sum of mode-determined task scores (R = 0.526, p < 0.05). These findings suggest that the proposed automated system demonstrates comparable validity to assessments by physiotherapists.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"212-226"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143441797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retracted: Optimized lung tumor diagnosis system using enhanced version of crow search algorithm, Zernike moments, and support vector machine. 利用增强版乌鸦搜索算法、Zernike 矩和支持向量机优化肺部肿瘤诊断系统。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-01-01 Epub Date: 2021-12-01 DOI: 10.1177/09544119211055870

Yihao Luo, Long Zhang, Ruoning Song, Chuang Zhu, Jie Yang, Benjamin Badami

引用次数: 0

Effects of self-expandable pedicle screws with shape memory alloy structures on spinal fixation strength: A finite element study. 具有形状记忆合金结构的自膨胀椎弓根螺钉对脊柱固定强度的影响：有限元研究

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-01-01 Epub Date: 2024-11-23 DOI: 10.1177/09544119241298535

Mahdi Mohammad Asghari, Aisa Rassoli, Hedayeh Mehmanparast

{"title":"Effects of self-expandable pedicle screws with shape memory alloy structures on spinal fixation strength: A finite element study.","authors":"Mahdi Mohammad Asghari, Aisa Rassoli, Hedayeh Mehmanparast","doi":"10.1177/09544119241298535","DOIUrl":"10.1177/09544119241298535","url":null,"abstract":"In many spine surgeries, pedicle screws are commonly used to stabilize vertebrae, however, loosening can be a complication. Different designs have shown improvements in fixation strength, with self-expandable screws featuring shape memory alloy (SMA) structures being of particular interest. This study aimed to assess the fixation strength of self-expandable pedicle screws made with SMA (specifically Nickel-Titanium) sheets. Three types of screws were evaluated: self-expandable screws with a smooth SMA surface, self-expandable screws with a porous SMA surface, and standard design screws. Each screw underwent pullout tests for comparison. Following the tests, the self-expandable screw with a porous surface exhibited the highest pullout force (1141.83 N), compared to 1056.86 N for the smooth self-expandable screw and 1104.25 N for the standard screw. The dissipated plastic strain energy differed among the screws, with values of 0.073 J for the porous self-expandable screw, 0.065 J for the smooth self-expandable screw, and 0.089 J for the standard pedicle screw. Notably, the porous self-expandable screw showed reduced stress on the bone-screw interface. Improving the mechanical design of pedicle screws could significantly enhance screw-bone fixation strength. The utilization of self-expandable pedicle screws with porous surface SMA sheets demonstrates superior performance, potentially mitigating complications like loosening.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"29-36"},"PeriodicalIF":1.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142695721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the bacterial cleaning performance on Zr-BMG with LIPSS after ultrasonic vibration assisted cleaning. 研究超声振动辅助清洗后LIPSS对Zr-BMG的细菌清洗性能。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-01-01 Epub Date: 2024-12-11 DOI: 10.1177/09544119241303307

Songlin Li, Kekang Mo, Cezhi Du

{"title":"Investigating the bacterial cleaning performance on Zr-BMG with LIPSS after ultrasonic vibration assisted cleaning.","authors":"Songlin Li, Kekang Mo, Cezhi Du","doi":"10.1177/09544119241303307","DOIUrl":"10.1177/09544119241303307","url":null,"abstract":"High-efficiency and high-quality sterilization technologies for medical materials can significantly reduce iatrogenic infection. This study investigates the synergistic effects of laser-induced periodic surface structures (LIPSS) and ultrasonic cleaning on the removal of bacteria from medical material surfaces. We specifically examined how ultrasonic parameters and structural defects in LIPSS impact the effectiveness of bacterial removal. As an emerging medical metal, Zr-BMG was chosen for the target material. Femtosecond laser processing was employed to create LIPSS with both complete linear arrays and discontinuous linear arrays structures featuring surface defects by adjusting the scanning overlap rate. A high-concentration solution of S. aureus was used for co-cultivation, resulting in a surface bacterial coverage rate exceeding 95%. The study analyzed the synergistic sterilization effect of microstructured surfaces through variations in ultrasonic cleaning power and duration. The results indicated that surfaces with microstructures demonstrated significantly improved bacterial removal following ultrasonic cleaning. The bacterial removal rate was found to be proportional to the ultrasonic vibrator power, and the surface with a LIPSS structure outperformed the discontinuous LIPSS surface in bacterial removal efficiency. Optimal results were achieved with the LIPSS surface after 30 min of cleaning at 100 W ultrasonic power. However, there was minimal difference in bacterial removal between 10 and 30 min at the same power level. This study aims to provide methodological insights and data support for the efficient and high-quality cleaning of medical metal surfaces.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"106-117"},"PeriodicalIF":1.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142814094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retracted: "Optimized lung tumor diagnosis system using enhanced version of crow search algorithm, Zernike moments, and support vector machine". 已撤回："使用增强版乌鸦搜索算法、Zernike 矩和支持向量机优化肺部肿瘤诊断系统"。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-01-01 Epub Date: 2024-05-16 DOI: 10.1177/09544119241255854

引用次数: 0

Welcome to Engineering in Medicine 2025. 欢迎访问 "医学工程 2025"。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-01-01 Epub Date: 2025-03-15 DOI: 10.1177/09544119251325081

Elizabeth Tanner

引用次数: 0

Optimization-based two-dimensional symmetric tossing motion prediction and validation. 基于优化的二维对称抛掷运动预测与验证。

IF 1.7 4区医学

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Pub Date : 2025-01-01 Epub Date: 2024-12-06 DOI: 10.1177/09544119241299917

Seunghun Lee, James Yang

{"title":"Optimization-based two-dimensional symmetric tossing motion prediction and validation.","authors":"Seunghun Lee, James Yang","doi":"10.1177/09544119241299917","DOIUrl":"10.1177/09544119241299917","url":null,"abstract":"Human motion has been analyzed for decades based on experimentally collected subject data, serving various purposes, from enhancing athletic performance to assisting patients' recovery in rehabilitation and many individuals can benefit significantly from study advancements. Human motion prediction, is a more challenging task because no experimental data are available in advance, particularly concerning repetitive tasks, such as box lifting and tossing, to prevent injury risks. Tossing, a common task in various industries, involves the simultaneous vertical and horizontal movement of objects but often results in bodily strain. This paper presents an optimization-based method for predicting two-dimensional (2D) symmetric tossing motion without relying on experimental data. The method employs sequential quadratic programming, which optimizes dynamic effort by incorporating both static and dynamic joint torque limits. To validate the proposed model, experimental data were collected from 10 subjects performing tossing tasks using a motion capture system and force plates. The predicted joint angles and ground reaction forces considering dynamic joint strength constraints were compared with their corresponding experimental data to validate the model. In addition, the predicted joint torques differences are compared between joint dynamics strengths and static strengths. The results showed that the predicted optimal tossing motions range between the maximum and minimum of the experimental standard deviation for kinematic data across all subjects and the ground reaction forces are also within the experimental data range. This supports the validity of the prediction model. The findings of this study could have practical applications, especially in preventing the potential risk of injuries among workers who have daily tossing jobs.","PeriodicalId":20666,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine","volume":" ","pages":"37-47"},"PeriodicalIF":1.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142786550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0