Journal of Medical Devices-Transactions of the Asme最新文献_第7页

Finite Element Analysis and Bench Testing of Ventricular Septal Defect Occluder 室间隔缺损封堵器的有限元分析与台架试验

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-03-12 DOI: 10.1115/1.4054082

Yiming Li, Chengli Song, Kun Sun

{"title":"Finite Element Analysis and Bench Testing of Ventricular Septal Defect Occluder","authors":"Yiming Li, Chengli Song, Kun Sun","doi":"10.1115/1.4054082","DOIUrl":"https://doi.org/10.1115/1.4054082","url":null,"abstract":"\u0000 Complications after transcatheter closure of the ventricular septal defect (VSD) is significantly associated with the mechanical behaviour of the VSD occluder. This study aims to investigate the effect of structural parameters of the VSD occluder. A mechanical model of the VSD occluder was constructed by theoretical modelling. The mechanical properties of the VSD occluders with different braiding angles (30°, 45°, 60°), materials (nitinol (NiTi), polydioxanone (PDO)) and waist-heights (3 mm, 4 mm) were analysed and validated by bench tests. For the 30°NiTi, 45°NiTi, 60°NiTi and 45°PDO occluders, the bending angles at the waist under 1 mm radial shrinkage were 112°, 121°, 155° and 155°, respectively. And the maximum principal strains at the waist were 16.62%, 8.19%, 1.20%, and 0.66%, respectively. The maximum radial deformations with 0.5 rad axial bending at the waist were 1.73, 1.44, 0.41 and 1.68 mm, respectively. When the occluders were implanted into VSD with the mean thickness of 3.5 mm, high stress appeared at the margin and the contact area, and the area with the 3-mm-occluder was much larger. In conclusion, the 60°NiTi occluder showed better ability to fit the deformation of the defect than the other NiTi occluders, and the 45°PDO occluder performed better under compression conditions but poorly under bending conditions than the 45°NiTi occluder. The choice of the appropriate waist-height is beneficial to eliminate associative complication by reducing the contact stress.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41782796","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

Early Experiences Designing a Scalable COVID-19 Reusable Elastomeric Respirator 设计可伸缩可重复使用的COVID-19弹性呼吸器的早期经验

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-03-10 DOI: 10.1115/1.4054055

Brianna L. Slatnick, Lumeng J. Yu, Alexander Yang, Kyle C Wu, Robert Crum, P. Betit, Mark Brown, Chad Pires, J. Priest, S. Staffa, Christopher Weldon, S. Fishman, Heung Bae Kim, Farokh R. Demehri

{"title":"Early Experiences Designing a Scalable COVID-19 Reusable Elastomeric Respirator","authors":"Brianna L. Slatnick, Lumeng J. Yu, Alexander Yang, Kyle C Wu, Robert Crum, P. Betit, Mark Brown, Chad Pires, J. Priest, S. Staffa, Christopher Weldon, S. Fishman, Heung Bae Kim, Farokh R. Demehri","doi":"10.1115/1.4054055","DOIUrl":"https://doi.org/10.1115/1.4054055","url":null,"abstract":"\u0000 The COVID-19 pandemic created an unprecedented shortage of personal protective equipment (PPE) for healthcare workers - especially respirators. In response to a lack of commercial respirator equipment, a multidisciplinary prototyping hackathon was held and the key components required to develop an inexpensive, scalable \"COVID-19 Reusable Elastomeric Respirator\" (RER-19) were identified. Available hospital supplies were assessed based on their published technical specifications to meet each of the key component requirements. The fully assembled prototype was then validated through user testing, and volunteers underwent standard fit testing with cardiopulmonary monitoring while wearing the RER-19 in a small pilot study. Multiple social media platforms were then used to disseminate educational information on respirator assembly, use, and maintenance. Here we present our institution's initial experience with prototyping to meet a specific healthcare challenge, in combination with prompt dissemination of information to educate and empower healthcare workers in the face of a critical PPE shortage during an unprecedented and evolving pandemic.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49183327","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

Designing Hybrid Mechanical Ventilator System Based On Arduino and Raspberry Pi 4 基于Arduino和树莓派4的混合机械呼吸系统设计

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-03-08 DOI: 10.1115/1.4054036

E. Malaekah, Khaled Al Awam, Husham Farouk, Elamir Abuabid, V. Mukhanov, A. Alahmari, Hasan Alshagag

{"title":"Designing Hybrid Mechanical Ventilator System Based On Arduino and Raspberry Pi 4","authors":"E. Malaekah, Khaled Al Awam, Husham Farouk, Elamir Abuabid, V. Mukhanov, A. Alahmari, Hasan Alshagag","doi":"10.1115/1.4054036","DOIUrl":"https://doi.org/10.1115/1.4054036","url":null,"abstract":"\u0000 Mechanical ventilators are advanced life-supporting machines in the present century. The ventilator needs to be safe, flexible, and easy for competent clinicians to use. Since ventilators supply the patient with gas, they need pneumatic components to be present. First technology ventilators were typically powered by pneumatic energy. Gas pressure is used to power ventilators as well as ventilate patients. Nowadays, ventilators are operated electronically with the useful microprocessor tool. This proposal aims to design a simple portable mechanical ventilator that includes measuring some important physiological variables such as respiratory rate, heart rate, and O2 saturation, which can be utilized in hospital and at home. The proposed system includes Arduino, Rasspary pi4, touch screen and graphical user interface. This study showed a significant individual performance for measuring some important parameters such as flow rate, tidal volume, and minute ventilation. The accuracy of measuring the flow rate was 72%. The Cohen's Kappa (CK) was estimated to be 0.61. The accuracy of calculated the tidal volume was estimated at 83% with 0.80 CK. The accuracy of measuring the O2 saturation was estimated at 99% with 0.99 CK. The advantages of the proposed design are cost-effective, safe, flexible, and easy to use. Also, this system is smart and can control its transactions, so it can be used at home without the need for professional help. The operating parameters can also be set by the user with a simple user interface.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48847589","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

Extravascular Cooling of Blood Using a Concentrated Thermoelectric Cooling Probe 使用集中热电冷却探针的血管外血液冷却

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-03-03 DOI: 10.1115/1.4054003

Connie Lee, A. Crouch, A. Jha, A. Adapa, Jose Diaz, A. Pandey, J. Greve, K. Pipe

{"title":"Extravascular Cooling of Blood Using a Concentrated Thermoelectric Cooling Probe","authors":"Connie Lee, A. Crouch, A. Jha, A. Adapa, Jose Diaz, A. Pandey, J. Greve, K. Pipe","doi":"10.1115/1.4054003","DOIUrl":"https://doi.org/10.1115/1.4054003","url":null,"abstract":"\u0000 Thermal therapies have strong potential for improving outcomes for patients suffering from cardiac arrest, neonatal hypoxic-ischemic encephalopathy, or medically refractory intracranial hypertension. We propose a novel tool to manipulate blood temperature through extravascular thermoelectric heat exchange of blood vessel walls and flowing blood. This tool is a concentrated cooling probe with several thermoelectric units combined to focus cooling at the application site. Using this tool, we aim to achieve desired levels of temperature control and potentially reduce complications associated with traditional intravascular or systemic thermal therapies. Leveraging the feedback control, speed, and reversible operation of thermoelectric cooling modules, the device can adapt to cool or heat as desired. Pre-clinical testing on rodent models confirmed rapid, significant reduction of intravenous jugular blood temperature when a prototype device was brought in contact with the left carotid artery (change in blood temperature of -4.74 ± 2.9 °C/hr and -4.29 ± 1.64 °C/hr for 0 °C and -5 °C cooling trials respectively). Declines in rectal temperature were also noted, but at lesser magnitudes than for jugular blood (0 °C: -3.09 ± 1.29 °C/hr; -5 °C: -2.04 ± 1.08), indicating proof-of-concept of thermoelectric extravascular blood cooling within a relatively localized region of the body. With further improvements in the technique, there is potential for selective organ cooling via reduction in flowing blood temperature.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48458673","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 Retractable Six-Prong Laparoscopic Grasper for Laparoscopic Myomectomy 一种可伸缩的六叉腹腔镜抓斗用于腹腔镜子宫切除术

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-03-03 DOI: 10.1115/1.4054013

B. Butters, Á. Fernández-Galiana, D. Wollin, G. Traverso, A. Slocum, J. Petrozza

引用次数: 0

Generating Appropriate and Reliable Evidence for Value Assessment of Medical Devices: An Ispor Medical Devices and Diagnostics Special Interest Group Report 为医疗器械价值评估生成适当和可靠的证据:Ispor医疗器械和诊断特别兴趣小组报告

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-02-24 DOI: 10.1115/1.4053928

N. Onwudiwe, R. Charter, B. Gingles, P. Abrishami, Henry Alder, Ameet Bahkai, Diane Civic, M. Kosaner Kließ, C. Lessard, Carla Zema

{"title":"Generating Appropriate and Reliable Evidence for Value Assessment of Medical Devices: An Ispor Medical Devices and Diagnostics Special Interest Group Report","authors":"N. Onwudiwe, R. Charter, B. Gingles, P. Abrishami, Henry Alder, Ameet Bahkai, Diane Civic, M. Kosaner Kließ, C. Lessard, Carla Zema","doi":"10.1115/1.4053928","DOIUrl":"https://doi.org/10.1115/1.4053928","url":null,"abstract":"\u0000 Background: Health Technology Assessment methods have become an important health policy tool. Yet recommendations for what constitutes appropriate and reliable evidence for assessment of medical devices are still debated because methods to evaluate pharmaceuticals are often, and incorrectly, the starting point for assessments.\u0000 Objectives:\u0000 The study aims to: (i) propose recommendations on appropriate methodologies to assess the evidence on medical devices (ii) identify assessment methods that can be used to measure device value and (iii) suggest key areas for future work\u0000 Methods:\u0000 ISPOR's Medical Devices and Diagnostics Special Interest Group conducted a comprehensive search of databases and gray literature on evidence development and value assessment on medical devices. The literature search was supplemented with hand searching from high impact journals in the related field. The 10-person expert working group obtained written comments through multiple rounds of review from internal and external stakeholders. Recommendations were made to guide future research.\u0000 Results:\u0000 Multi-criteria decision analysis was identified as a useful approach to assess the value of treatment. Consideration should be given to resource use measures; valid and reliable functional status questionnaires; and general and disease-specific, health-related, quality-of-life measures in economic evaluations of device use. For future work, best practices for value framework design.\u0000 Conclusions:\u0000 Integration of value-based evidence in an evidence-generation and -synthesis process is needed to support market access and adoption. Methodological recommendations for measuring value can be challenging when the selection of domains and assessment of value are not device-specific.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45177337","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

Use of Real-World Data for Enhancing Model Credibility: Applications to Medical Device Development 使用真实世界的数据来提高模型可信度:在医疗设备开发中的应用

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-02-19 DOI: 10.1115/1.4053888

Paul L. Briant, J. Bischoff, M. Dharia, Franck Le Navéaux, Xuemei Li, Sanjeev M. Kulkarni, Danny Levine, David Ramos, Payman Afshari

{"title":"Use of Real-World Data for Enhancing Model Credibility: Applications to Medical Device Development","authors":"Paul L. Briant, J. Bischoff, M. Dharia, Franck Le Navéaux, Xuemei Li, Sanjeev M. Kulkarni, Danny Levine, David Ramos, Payman Afshari","doi":"10.1115/1.4053888","DOIUrl":"https://doi.org/10.1115/1.4053888","url":null,"abstract":"\u0000 Evaluating the credibility of computational models used in medical device development is increasingly important as medical devices become more complex and modeling takes on a more critical role in the device development process. While bench-testing based comparisons are common for assessing model credibility and have many advantages, such as control over test specimens and the ability to quantify outputs, the credibility assessments performed with bench tests often do not evaluate the clinical relevance of key aspects of model form (such as boundary conditions, constitutive models/properties, and geometries) selected when simulating in vivo conditions.\u0000 Real-world data (outcomes data generated through clinical use of a device) offer an opportunity to assess the applicability and clinical relevance of a computational model. Although real-world data are frequently less controlled and more qualitative than benchtop data, real-world data are often a direct assessment of a particular clinical complication and therefore of high clinical relevance. Further, real-world data have the potential to reveal failure modes not previously identified in pre-clinical failure modes analysis, thereby motivating testing advancements. To review the use of clinical data in medical device modeling, this paper presents a series of examples related to tibial tray fracture that incorporate varying levels of benchtop data and real world data when evaluating model credibility. The merits and drawbacks of the credibility assessment for each example are discussed in order to provide practical and actionable guidance on the use of real world data for establishing and demonstrating model credibility.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48066375","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

Analysis of a Novel Nasoenteral Tube Design 一种新型鼻肠管设计分析

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-02-16 DOI: 10.1115/1.4053876

David S. Kirn, William F. Whitman, Richard D. Hisel, J. Price

引用次数: 0

A Low-Cost Three-Axis Force Sensor for Wearable Gait Analysis Systems 一种用于可穿戴步态分析系统的低成本三轴力传感器

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-02-02 DOI: 10.1115/1.4053725

Md Shafiqur Rahman, B. Hejrati

引用次数: 2

iQbD: a TRL-indexed Quality-by-Design Paradigm for Medical Device Engineering iQbD:一种TRL索引的医疗器械工程质量设计范式

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-02-01 DOI: 10.1115/1.4053721

T. Bastogne

{"title":"iQbD: a TRL-indexed Quality-by-Design Paradigm for Medical Device Engineering","authors":"T. Bastogne","doi":"10.1115/1.4053721","DOIUrl":"https://doi.org/10.1115/1.4053721","url":null,"abstract":"\u0000 Risk assessment is a critical step in the roadmap of medical device development. Failure modes, effects and criticality analysis is a common approach based on declarative prior information that proved beneficial in the risk assessment of well established processes. But at early steps of development when innovative materials or technologies are embedded, the lack of experience on those innovations introduces too much subjectivity in FMECA for a robust risk assessment. Since mid-2000, the Quality-by-Design guideline has been proposed within the pharmaceutical industry as a proactive engineering approach of drug development. This paradigm enables a data-driven risk assessment throughout the development workflow, which completes risk assessment provided by FMECA. Nevertheless, its implementation guide is unclear and not flexible enough to be efficiently applied to the development of medical devices. To address this issue, a new QbD paradigm indexed on the technological readiness level of the innovative product is proposed. It covers the development of medical devices throughout the whole preclinical phase and is composed of at least nine learning cycles. The first part of this medical device QbD layout, composed of three consecutive risk assessment cycles, is evaluated through a real study case with the objective to demonstrate the proof of concept of a photobleaching controller in photodynamic therapy. Beyond this experimental result, this application has confirmed practical ability of the iQbD approach to complete FMECA and to provide an alternative solution to risk assessment when prior knowledge on the technological innovation is not available.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49177481","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: 3