Journal of Medical Devices-Transactions of the Asme最新文献_第8页

Patient-Customised Theatre Mattress Supports for Spinal Surgery: A Pilot Study Presenting a Novel Engineering Virtual Design and Manufacturing Technique 脊柱外科患者定制的剧院床垫支架：一项新的工程虚拟设计和制造技术的初步研究

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2022-01-19 DOI: 10.1115/1.4053604

J. P. Little, D. Green, M. Izatt, Gregory Moloney, G. Askin

{"title":"Patient-Customised Theatre Mattress Supports for Spinal Surgery: A Pilot Study Presenting a Novel Engineering Virtual Design and Manufacturing Technique","authors":"J. P. Little, D. Green, M. Izatt, Gregory Moloney, G. Askin","doi":"10.1115/1.4053604","DOIUrl":"https://doi.org/10.1115/1.4053604","url":null,"abstract":"\u0000 Optimal patient positioning for spine surgery is vital for surgical success and the minimisation of complications intra-/post-operatively. In patients with complex co-morbidities, commercially available surgical positioning equipment is inadequate. To overcome this, a novel method was developed to create custom-fit patient-specific theatre mattresses for patients undergoing spine surgery. An innovative digital workflow involving 3D surface scanning, 3D simulation and computer aided design was developed to manufacture customised theatre supports with patient-specific requirements. These supports offered the surgeon an enhanced ability to relieve load bearing on prominent anatomical features or where desired, to tailor the support surface to the patient's anatomy for lengthy surgery. The bespoke theatre mattress was evaluated by whether the support resulted in a complication-free surgery. Using this new workflow, case examples for two patients with complex co-morbidities were described. The spine surgeon and anaesthetist reported the patient-specific custom mattresses were fit as per the required design, provided sufficient clearance around anatomical prominences and areas that required to be unloaded, had sufficient clearance for the anaesthetic method and cannulation, provided excellent surgical access and stability during surgery, and postoperatively no soft tissue overload over bony prominence and implanted devices. Positive patient outcomes after successful lengthy surgical interventions were associated with these patient-specific, contoured mattress supports. Future projects will seek to utilise this technology for other types of surgeries and intra-operative positioning requirements, and for a broader demographic of patients in both the paediatric and adult setting.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44709517","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

Evaluation of a Pneumatic Vest to Treat Symptoms of ARDS Caused by COVID-19 气动背心治疗COVID-19引起的ARDS症状的评价

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-12-27 DOI: 10.1115/1.4053387

Alexander B. Ambrose, Joshua F. Detelich, M. Weinmann, F. Hammond

{"title":"Evaluation of a Pneumatic Vest to Treat Symptoms of ARDS Caused by COVID-19","authors":"Alexander B. Ambrose, Joshua F. Detelich, M. Weinmann, F. Hammond","doi":"10.1115/1.4053387","DOIUrl":"https://doi.org/10.1115/1.4053387","url":null,"abstract":"\u0000 Critical care patients who experience symptoms of acute respiratory distress syndrome are commonly placed on mechanical ventilators to increase the oxygen provided to their pulmonary systems and monitor their condition. With the pulmonary inflammation typically accompanying ARDS, patients can experience lower ventilation-perfusion ratios resulting in lower blood oxygenation. In these cases, patients are typically rotated into a prone position to facilitate improved blood flow to portions of the lung that were not previously participating in the gas exchange process. However, proning a patient increases the risk of complications, requires up to seven hospital staff members to carry out, and does not guarantee an improvement in the patient's condition. The low-cost vest presented here was designed to reproduce the effects of proning while also requiring less hospital staff than the proning process. Additionally, the V/Q Vest helps hospital staff predict whether patients would respond well to a proning treatment. A pilot study was conducted on nine patients with ARDS from Coronavirus disease 2019 (COVID-19). The average increase in oxygenation with the V/Q Vest treatment for all patients was 19.7 ± 38.1%. Six of the nine patients responded positively to the V/Q Vest treatment, exhibiting increased oxygenation. The V/Q Vest also helped hospital staff predict that three of the five patients that were proned would experience an increase in oxygenation. An increase in oxygenation resulting from V/Q Vest treatment exceeded that of the proning treatment in two of these five proned patients.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63503388","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

Preoperative Motion Planner for Steerable Needles Using Cost Map Based on Repulsive Field and Empirical Model of Needle Deflection 基于斥力场成本图和针偏转经验模型的可操纵针术前运动规划

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-12-16 DOI: 10.1115/1.4053285

Shan Jiang, Bowen Jiang, Peina Fang, Zhiyong Yang

{"title":"Preoperative Motion Planner for Steerable Needles Using Cost Map Based on Repulsive Field and Empirical Model of Needle Deflection","authors":"Shan Jiang, Bowen Jiang, Peina Fang, Zhiyong Yang","doi":"10.1115/1.4053285","DOIUrl":"https://doi.org/10.1115/1.4053285","url":null,"abstract":"\u0000 Needle insertion is a common procedure in percutaneous puncture. A motion planner for a steerable needle that considers the risk level of the path in anatomical environment and the actual deflection of clinical needle is necessary. A novel preoperative motion planner for a steerable needle controlled by robot is proposed. Our method utilizes sampling-based planner to compute candidate path in the reachable region, the path solutions are optimized by calculating the cost of a path based on a cost map. The cost-map, which is built based on repulsive field theory from CT image, encodes the information of the obstacle locations and the criticality of the anatomical environment. The empirical formula that can predict needle trajectory is obtained by insertion experiments. Experiments shown that positioning error in gelatin phantom under the guidance of our planner is less than 1.1mm. Comparing with the straight-line insertion method, the positioning error was reduced by 80%. The results indicate that the motion planner has the potential to provide effective guidance for robot-assisted puncture surgery while enhancing the position precision and patient safety.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41636267","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

Design and Initial Validation of a Multiple Degree-of-Freedom Joint for an Ankle-Foot Orthosis 踝足矫形器多自由度关节的设计与初步验证

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-12-11 DOI: 10.1115/1.4053200

Toby Elery, Emma Reznick, Staci M. Shearin, Karen J. McCain, R. Gregg

引用次数: 2

RestEaze: An Emerging Technology to Characterize Leg Movements During Sleep RestEaze:一种描述睡眠中腿部运动的新兴技术

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-12-06 DOI: 10.1115/1.4053160

Justin Brooks, C. Feltch, J. Lam, C. Earley, R. Robucci, Sanjay Agarwal, Nilanjan Banerjee

{"title":"RestEaze: An Emerging Technology to Characterize Leg Movements During Sleep","authors":"Justin Brooks, C. Feltch, J. Lam, C. Earley, R. Robucci, Sanjay Agarwal, Nilanjan Banerjee","doi":"10.1115/1.4053160","DOIUrl":"https://doi.org/10.1115/1.4053160","url":null,"abstract":"\u0000 Several sleep disorders are characterized by periodic leg movements during sleep including Restless Leg Syndrome, and can indicate disrupted sleep in otherwise healthy individuals. Current technologies to measure periodic leg movements during sleep are limited. Polysomnography and some home sleep tests use surface electromyography to measure electrical activity from the anterior tibilias muscle. Actigraphy uses 3-axis accelerometers to measure movement of the ankle. Electromyography misses periodic leg movements that involve other leg muscles and is obtrusive because of the wires needed to carry the signal. Actigraphy based devices require large amplitude movements of the ankle to detect leg movements (missing the significant number of more subtle leg movements) and can be worn in multiple configurations precluding precision measurement. These limitations have contributed to their lack of adoption as a standard of care for several sleep disorders. In this study, we develop the RestEaze sleep assessment tool as an ankle-worn wearable device that combines capacitive sensors and a 6-axis inertial measurement unit to precisely measure periodic leg movements during sleep. This unique combination of sensors and the form-factor of the device addresses current limitations of periodic leg movements during sleep measurement techniques. Pilot data collected shows high correlation with polysomnography across a heterogeneous participant sample and high usability ratings. RestEaze shows promise in providing ecologically valid, longitudinal measures of leg movements that will be useful for clinicians, researchers, and patients to better understand sleep.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43134886","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

Preliminary Evaluation of Hydraulic Needle Delivery System for Magnetic Resonance Imaging-Guided Prostate Biopsy Procedures 磁共振成像引导前列腺活检液压针头输送系统的初步评价

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-12-01 DOI: 10.1115/1.4051610

D. I. Mahcicek, Korel D. Yildirim, Gokce Kasaci, O. Kocaturk

引用次数: 0

Functional Evaluation of a Personalized Orthosis for Knee Osteoarthritis: A Motion Capture Analysis 膝骨关节炎个性化矫形器的功能评估：运动捕捉分析

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-12-01 DOI: 10.1115/1.4051626

M. Huber, M. Eschbach, K. Kazerounian, H. Ilies

{"title":"Functional Evaluation of a Personalized Orthosis for Knee Osteoarthritis: A Motion Capture Analysis","authors":"M. Huber, M. Eschbach, K. Kazerounian, H. Ilies","doi":"10.1115/1.4051626","DOIUrl":"https://doi.org/10.1115/1.4051626","url":null,"abstract":"\u0000 Orthotic treatments for knee osteoarthritis (OA) typically rely on simple mechanisms such as three-point bending straps and single-pin hinges. These commonly prescribed braces cannot treat bicompartmental knee OA, do not consider the muscle weakness that typically accompanies the condition, and employ hinges that restrict the knee's natural biomechanics. Utilizing a novel, personalized joint mechanism in conjunction with magnetorheological dampers, we have developed and evaluated a brace which attempts to address these shortcomings. This process has respected three principal design goals: reducing the load experienced across the entire knee joint, generating a supportive moment to aid the thigh muscles in shock absorption, and interfering minimally with gait kinematics. Two healthy volunteers were chosen to test the system's basic functionality through gait analysis in a motion capture laboratory. Combining the collected kinematic and force-plate data with data taken from sensors onboard the brace, we integrated the brace and leg system into a single inverse dynamics analysis, from which we were able to evaluate the effect of the brace design on the subjects' knee loads and moments. Of the three design goals: a reduction in knee contact forces was demonstrated; increased shock absorption was observed, but not to statistical significance; and natural gait was largely preserved. Taken in total, the outcome of this study supports additional investigation into the system's clinical effectiveness, and suggests that further refinement of the techniques presented in this paper could open the doors to more effective OA treatment through patient specific braces.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41475684","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

In Vitro Evaluation of a Nasal Interface Used to Improve Delivery from a Portable Oxygen Concentrator 用于改善便携式氧气浓缩器输送的鼻界面的体外评价

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-11-24 DOI: 10.1115/1.4053115

C. Christianson, K. Pillay, John Z Chen, W. Finlay, Andrew R. Martin

{"title":"In Vitro Evaluation of a Nasal Interface Used to Improve Delivery from a Portable Oxygen Concentrator","authors":"C. Christianson, K. Pillay, John Z Chen, W. Finlay, Andrew R. Martin","doi":"10.1115/1.4053115","DOIUrl":"https://doi.org/10.1115/1.4053115","url":null,"abstract":"\u0000 Portable oxygen concentrators (POCs) are widely used to administer long-term oxygen therapy (LTOT) and employ pulsed delivery modes to conserve oxygen. Efficient pulsed delivery requires that POCs are triggered by patient inhalation. Triggering is known to fail for some patients during periods of quite breathing, as occurs during sleep. The present article describes a new nasal interface designed to improve triggering of pulsed oxygen delivery from portable oxygen concentrators (POCs). In vitro experiments incorporating realistic nasal airway replicas and simulated breathing were conducted. The pressure monitored via oxygen supply tubing (the signal pressure) was measured over a range of constant inhalation flow rates with the nasal interface inserted into the nares of the nasal airway replicas, and compared with signal pressures measured for standard and flared nasal cannulas. Triggering efficiency and the fraction of inhaled oxygen (FiO2) were then evaluated for the nasal interface and cannulas used with a commercial POC during simulated tidal breathing through the replicas. Higher signal pressures were achieved for the nasal interface than for nasal cannulas at all flow rates studied. The nasal interface triggered pulsed delivery from the POC in cases where nasal cannulas failed to trigger. FiO2 was significantly higher for successful triggering cases than for failed triggering cases. The nasal interface improved triggering of pulsed oxygen delivery from a POC and presents a simple solution that could be used with commercially-available POCs to reliably supply oxygen during periods of quiet breathing.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47366711","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

Designing and Testing a Closed-loop Magnetically Actuated Laser Scanning System for Tissue Ablation 用于组织消融的闭环磁驱动激光扫描系统的设计与测试

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-11-20 DOI: 10.1115/1.4053073

Hamed Mohammadbagherpoor, Alperen Acemoglu, L. Mattos, D. Caldwell, James J. Johnson, J. Muth, E. Grant

{"title":"Designing and Testing a Closed-loop Magnetically Actuated Laser Scanning System for Tissue Ablation","authors":"Hamed Mohammadbagherpoor, Alperen Acemoglu, L. Mattos, D. Caldwell, James J. Johnson, J. Muth, E. Grant","doi":"10.1115/1.4053073","DOIUrl":"https://doi.org/10.1115/1.4053073","url":null,"abstract":"\u0000 Biomedical robotic systems continue to hold unlimited potential for surgical procedures. Robotized laser endoscopic tools provide surgeons with increased accuracy in the laser ablation of tissue and tumors. The research here catalogs the design and implementation of a new laser endoscopic tool for tissue ablation. A novel feature of this new device is the inclusion of a feedback loop that measures the position of the laser beam via a photo-detector sensor. The scale of this new device was governed by the dimensions of the photo-detector sensor. The tip of the laser's fiber optic cable is controlled by the torque interaction between permanent magnet rings surrounding the fiber optic and the custom designed solenoid coils. Prior to building the physical test-bed the system was modeled and simulated using COMSOL software. In pre-clinical trials, the physical experimental results showed that the designed prototype laser scanner system accurately track different ablation patterns and gives a consistent output position for the laser beam however, the heat diffusion into the tissue around the desired line of the geometric shape would give wider ablation margins than was desirable.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42565241","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

Effect of Leaflet Type and Leaflet-Stent Attachment Height on Transcatheter Aortic Valve Leaflet Thrombosis Potential 小叶类型和支架附着高度对经导管主动脉瓣小叶血栓形成电位的影响

IF 0.9 4区医学

Journal of Medical Devices-Transactions of the Asme Pub Date : 2021-11-03 DOI: 10.1115/1.4052902

Beatrice Ncho, Andrew W. Siefert, V. Sadri, Jillian Ortner, A. Yoganathan

{"title":"Effect of Leaflet Type and Leaflet-Stent Attachment Height on Transcatheter Aortic Valve Leaflet Thrombosis Potential","authors":"Beatrice Ncho, Andrew W. Siefert, V. Sadri, Jillian Ortner, A. Yoganathan","doi":"10.1115/1.4052902","DOIUrl":"https://doi.org/10.1115/1.4052902","url":null,"abstract":"\u0000 Transcatheter aortic valve replacement devices vary in leaflet material and in the height for which leaflets attach to the stented valve frame. Combinations of these features can influence leaflet dynamics, neo-sinus geometries, and fluid dynamics, thereby reducing or exacerbating the potential for blood flow stasis and leaflet thrombosis. To investigate these interconnected relationships, this study evaluated the effects of transcatheter valve leaflet type (porcine vs. bovine pericardium) and the leaflet-stent attachment height (low, mid, and high) on flow stasis and potential for leaflet thrombosis. Transcatheter valve models were manufactured and tested within an aortic simulator under pulsatile left heart hemodynamic conditions. Transvalvular hemodynamics, leaflet kinematics, and flow structures were evaluated by direct measurement, high-speed imaging, and two differing techniques of particle image velocimetry. Transcatheter valves with porcine pericardial leaflets were observed to be less stiff, exhibit a lesser resistance to flow, were associated with reduced regions of neo-sinus flow stasis, and superior sinus washout times. More elevated attachments of the leaflets were associated with less neo-sinus flow stasis. These initial results and observations suggest combinations of leaflet type and stent attachment height may reduce transcatheter aortic valve flow stasis and the potential for leaflet thrombosis.","PeriodicalId":49305,"journal":{"name":"Journal of Medical Devices-Transactions of the Asme","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45495826","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