Journal of Medical Devices-Transactions of the Asme最新文献_第10页

Feasibility of a One Degree-of-Freedom Linear Robot for Bed-Bound Stroke Rehabilitation 一自由度线性中风卧床康复机器人的可行性研究

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-09-01 DOI: 10.1115/1.4050454

N. Berezny, D. Dowlatshahi, M. Ahmadi

引用次数: 1

Examination of Mechanical Properties and Photoelastic Properties of Gel Material for Blood Vesssel Mimics 血管模拟用凝胶材料的力学性能和光弹性性能研究

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-09-01 DOI: 10.1115/1.4051516

Daichi Yamada, Simon Hori, Shuhei Abe, Yuki Kumeno, T. Yamazaki, C. Oka, J. Sakurai, S. Hata

{"title":"Examination of Mechanical Properties and Photoelastic Properties of Gel Material for Blood Vesssel Mimics","authors":"Daichi Yamada, Simon Hori, Shuhei Abe, Yuki Kumeno, T. Yamazaki, C. Oka, J. Sakurai, S. Hata","doi":"10.1115/1.4051516","DOIUrl":"https://doi.org/10.1115/1.4051516","url":null,"abstract":"\u0000 Catheter surgery is a minimally invasive treatment in which visual information is limited to a two-dimensional image generated by an X-ray camera. This results in the possibility that stress applied by the catheter onto a blood vessel wall damages the vessel. Doctors must therefore be skillful at catheter surgery. We proposed a catheter surgery simulator that visualizes the stress applied to the blood vessel wall using photoelasticity. The manufacture of this simulator requires creating blood vessel mimics that reproduce the physical properties of blood vessel tissue using photoelasticity. This study investigated the mechanical and photoelastic properties of gel materials and selected a gel composition suitable for making blood vessel mimics. The mechanical properties of polyvinyl alcohol (PVA) hydrogel changed in the range 70–335 kPa by changing the composition ratio, and double network (DN) gel changed in the range 0.13–1.06 MPa by changing the composition ratio. These gels could be adjusted by changing the material composition to provide Young's moduli similar to that of blood vessels. The photoelastic properties of PVA hydrogel changed in the range 1.38–2.76 × 10−9/Pa by changing the composition ratio, and DN gel changed in the range 0.012–0.029 × 10−9/Pa by changing the composition ratio.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44278182","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: 1

A Vibratory, Subresonant Diagnostic Device to Measure Dental Implant Stability Via Angular Stiffness 一种通过角刚度测量牙种植体稳定性的振动亚共振诊断装置

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-09-01 DOI: 10.1115/1.4051832

Weiwei Xu, Darwin S. Wood, Yifeng Liu, I. Shen

{"title":"A Vibratory, Subresonant Diagnostic Device to Measure Dental Implant Stability Via Angular Stiffness","authors":"Weiwei Xu, Darwin S. Wood, Yifeng Liu, I. Shen","doi":"10.1115/1.4051832","DOIUrl":"https://doi.org/10.1115/1.4051832","url":null,"abstract":"\u0000 Stability of a dental implant reflects quality of osseointegration between the implant and its surrounding bone. While many methods have been proposed to characterize implant stability, angular stiffness at the neck of the implant has been proven to be a rigorous and accurate measure. Nevertheless, fast and reliable measurements of the angular stiffness in a clinical environment are not yet available. This article is to demonstrate a novel stability diagnostic device that can measure the angular stiffness accurately in clinical environments. The device consists of a sensing unit, a controller unit, and a mobile app. In the sensing unit, a coupler attaches a buzzer motor and a tiny accelerometer to an abutment of an implant, whose angular stiffness is to be measured. The buzzer vibrates at a frequency below the resonance frequency of the implant–bone–abutment system. Meanwhile, the accelerometer measures the abutment's vibration. The controller unit powers the buzzer, reads the accelerometer data, and transmits the data to the mobile app. The mobile app postprocesses the data and extracts the angular stiffness through use of a finite element model and a nonlinear regression algorithm. The extracted angular stiffness is compared with a calibrated angular stiffness, which is obtained independently via a force hammer and a laser Doppler vibrometer. The comparison shows reasonable agreement, with the difference being in the range of 4–20%.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47556204","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

A Computational Method for the Estimation of the Geometrical and Thermophysical Properties of Tumor Using Contact Thermometry 用接触测温法估算肿瘤几何和热物理性质的一种计算方法

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-09-01 DOI: 10.1115/1.4051517

N. Sudarsan, K. Arathy, Linta Antony, R. S. Sudheesh, M. N. Muralidharan, B. Satheesan, Seema Ansari

{"title":"A Computational Method for the Estimation of the Geometrical and Thermophysical Properties of Tumor Using Contact Thermometry","authors":"N. Sudarsan, K. Arathy, Linta Antony, R. S. Sudheesh, M. N. Muralidharan, B. Satheesan, Seema Ansari","doi":"10.1115/1.4051517","DOIUrl":"https://doi.org/10.1115/1.4051517","url":null,"abstract":"\u0000 Contact thermometry is the measurement of surface temperature using sensors in contact with the medium. These surface temperatures can be potential indicators of any abnormality possibly a tumor. This research work aims to present a computation method that makes use of contact thermometry to estimate the geometric center, size, and thermophysical properties of breast tumor. Wearable thermal sensors captured real-time surface temperature readings from discrete point locations. The continuous heat distribution over the domain was formulated using forward heat transfer analysis. The optimization method estimated tumor parameters of the breast, and a three-dimensional thermal model was developed from the estimated parameters. Laboratory experiments on breast phantoms were done to validate the estimation method. Furthermore, real-time temperature readings of human subjects were recorded, and the estimated location and size were then compared with the mammogram results. It was found that the estimated two-dimensional geometric center and the size in diameter of the tumor closely match with the mammogram results. Further, the thermophysical properties estimated using the proposed method had a higher order in subjects having a tumor making it a tool for breast cancer screening.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43203232","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: 2

VEMERS UC: A Clinically Validated Emergency Mechanical Ventilator for COVID-19 and Postpandemic Use in Low Resource Communities VEMERS UC:用于COVID-19和低资源社区大流行后临床验证的紧急机械呼吸机

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-09-01 DOI: 10.1115/1.4051246

L. Chiang, Felipe A. Castro

{"title":"VEMERS UC: A Clinically Validated Emergency Mechanical Ventilator for COVID-19 and Postpandemic Use in Low Resource Communities","authors":"L. Chiang, Felipe A. Castro","doi":"10.1115/1.4051246","DOIUrl":"https://doi.org/10.1115/1.4051246","url":null,"abstract":"In this article, we present a clinically validated invasive emergency mechanical ventilator developed in Chile called VEMERS UC. It has been clinically tested and validated in intubated Covid-19 patients. Once the pandemic hit Chilean soil in March 2020, it was quite clear that the number of mechanical ventilators available would not be enough. As in other parts of the world many initiatives sprung, most of them naively simple. Chilean medical societies joined engineering specialists and agreed early on in an organized and regulated open process for validating emergency mechanical ventilators, thus allowing for rapid development but with the required functionality, reliability, and safety features. VEMERS UC was one of a few that completed successfully all stages of the validating process, the final test being on five critically ill intubated Covid-19 patients for eight hours each. VEMERS UC is based on an electropneumatic circuit architecture, and its components are all low cost, off-the-shelf pneumatic, and electronic products easily obtained in industrial markets. It works in continuous mandatory volume control mode. The novel technical features of VEMERS UC are discussed here as well as the results obtained in each stage of the validating process. The validating process carried out in Chile is noteworthy by itself, and it could be used as an example in other developing countries. Furthermore, VEMERS UC can be used as a guiding design reference in other countries as well, since this design has already been thoroughly tested in human patients and has proven to work successfully.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":"184 6 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81058917","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: 2

Neuromodulation Applications for Chronic Pain 慢性疼痛的神经调节应用

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-08-12 DOI: 10.1115/1.4052123

Dharam Persaud-Sharma, J. Mallett, G. Panjeton, Blessing Ogbemudia, Affan Ahmad, S. Coombes, Ajay Antony

引用次数: 1

Pre-Lubricated Polypropylene Injector for Breast Implant Delivery 乳房植入物输送用预润滑聚丙烯注射器

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-08-12 DOI: 10.1115/1.4052122

Hsiao-Hung Chaing, Chen-Ying Su, Hsiu-Peng Lin, Chiao-Pei Chen, Ting-Chu Yu, Hsu-Wei Fang

{"title":"Pre-Lubricated Polypropylene Injector for Breast Implant Delivery","authors":"Hsiao-Hung Chaing, Chen-Ying Su, Hsiu-Peng Lin, Chiao-Pei Chen, Ting-Chu Yu, Hsu-Wei Fang","doi":"10.1115/1.4052122","DOIUrl":"https://doi.org/10.1115/1.4052122","url":null,"abstract":"\u0000 Breast augmentation is a common aesthetic surgery, and there are two major surgical methods for breast implant delivery: the finger method and the plastic film method. There are advantages and disadvantages for each method, and we have developed a pre-lubricated polypropylene (PP) injector that might be the most suitable device for delivering breast implants. By covering the interior surface of the injector with the hydrophilic coating, the friction coefficient was significantly reduced when sliding a silicone sled against the pre-lubricated PP injector. In order to confirm the pre-lubricated PP injector would not damage the breast implant, fatigue testing was performed and the result showed the injector did not cause rupture or microleakage of the breast implant. In addition, the cell viability result demonstrated the pre-lubricated PP injector was biocompatible. In addition, the pre-lubricated PP injector provides a small incision site and stability during breast implant delivery. Our results provided evidence that the pre-lubricated PP injector is a smooth and safe method for breast implant delivery.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47337937","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

A Systematic Review of Compliant Mechanisms as Orthopedic Implants 骨科植入物柔顺机制的系统综述

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-08-06 DOI: 10.1115/1.4052011

Connor Huxman, Jared Butler

引用次数: 1

Characterization and Validation of Fatigue Strains for Superelastic Nitinol using Digital Image Correlation 超弹性镍钛诺疲劳应变的数字图像相关表征与验证

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-08-06 DOI: 10.1115/1.4052012

Koray Senol, H. Cao, S. Tripathy

引用次数: 3

Design and Development of An Instrumented Knee Joint for Quantifying Ligament Displacements 量化膝关节韧带位移的仪器设计与研制

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-06-10 DOI: 10.1115/1.4051440

Lei Cui, B. Dale, G. Allison, Min Li

{"title":"Design and Development of An Instrumented Knee Joint for Quantifying Ligament Displacements","authors":"Lei Cui, B. Dale, G. Allison, Min Li","doi":"10.1115/1.4051440","DOIUrl":"https://doi.org/10.1115/1.4051440","url":null,"abstract":"\u0000 Recently, robotic assistive leg exoskeletons have gained popularity because an increased number of people crave for powered devices to run faster and longer or carry heavier loads. However, these powered devices have the potential to impair knee ligaments. This work was aimed to develop an instrumented knee joint via rapid prototyping that measures the displacements of the four major knee ligaments—the anterior cruciate ligament (ACL), posterior crucial ligament (PCL), medial collateral ligament (MCL), and lateral collateral ligament (LCL)—to quantify the strain experienced by these ligaments. The knee model consists of a femur, lateral and medial menisci, and a tibia-fibula, which were printed from three dimensional (3D) imaging scans. Nonstretchable cords served as main fiber bundles of the ligaments with their desired stiffnesses provided by springs. The displacement of each cord was obtained via a rotary encoder mechanism, and the leg flexion angle was acquired via a closed-loop four-bar linkage of a diamond shape. The displacements were corroborated by published data, demonstrating the profiles of the displacement curves agreed with known results. The paper shows the feasibility of developing a subject-specific knee joint via rapid prototyping that is capable of quantifying the ligament strain via rapid prototyping.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47071410","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: 1