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Development of an Affordable Myoelectric Hand for Transradial Amputees 经桡骨截肢者可负担得起的肌电手的开发
Alok Prakash, Shiru Sharma
Upper limb amputations seriously affect a patient's life by restricting their ability in performing various tasks. Prosthetic hands are considered the primary method to reinstate the lost capabilities of such amputees. However, the presently available prosthetic devices are unable to fulfill the requirements of users due to their excessively high cost, limited functionality, heavy weight, unnatural operation, and complexity. This article presents an affordable and simple control-based myoelectric hand for transradial amputees. The hand setup mainly consists of a self-designed surface electromyography (sEMG) sensor, a microcontroller unit and a five-fingered, intrinsically actuated 3D printed hand for dexterous operations. The developed hand was implemented with proportional control scheme and was successfully tested on five amputees (with missing lower forearms) for performing grasping activities of different objects. Further, the closing time and grip force at the fingertips were also determined for the hand to compare its performance with the commercially available hands.
上肢截肢严重影响患者的生活,限制了他们执行各种任务的能力。假手被认为是恢复这些截肢者失去的能力的主要方法。然而,目前可用的假肢装置由于其过高的成本,有限的功能,重量大,不自然的操作和复杂性,无法满足用户的要求。本文介绍了一种价格合理且简单的基于控制的经桡骨截肢者肌电手。手部装置主要由一个自行设计的表面肌电(sEMG)传感器、一个微控制器单元和一个五指、内在驱动的3D打印手组成,用于灵巧的操作。开发的手采用比例控制方案,并成功地在5名截肢者(失去下前臂)身上进行了不同物体抓取活动的测试。此外,还确定了手的闭合时间和指尖的握力,以将其与市售手的性能进行比较。
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引用次数: 6
Biomechanical Study of Lumbar Spine (L2-L4) Using Hybrid Stabilization Device - A Finite Element Analysis 使用混合稳定装置腰椎(L2-L4)的生物力学研究-有限元分析
Pushpdant Jain, Mohammed Rajik Khan
Spinal instrumentations have been designed to alleviate lower back pain and stabilize the spinal segments. The present work aims to evaluate the biomechanical effect of the proposed Hybrid Stabilization Device (HSD). Non-linear finite element model of lumbar segment L2-L4 were developed to compare the intact spine (IS) with rigid implant (RI) and hybrid stabilization device. To restrict all directional motion vertebra L4 bottom surface were kept fixed and axial compressive force of 500N with a moment of 10Nm were applied to the top surface of L2 vertebrae. The results of range of motion (ROM), intervertebral disc (IVD) pressure and strains for IVD-23 and IVD-34 were determined for flexion, extension, lateral bending and axial twist. Results demonstrated that ROM of HSD model is higher than RI and lower as compared to IS model. The predicted biomechanical parameters of the present work may be considered before clinical implementations of any implants.
脊柱内固定被设计用来减轻腰痛和稳定脊柱节段。本研究旨在评估所提出的混合稳定装置(HSD)的生物力学效果。建立腰椎节段L2-L4的非线性有限元模型,比较完整脊柱(IS)与刚性植入物(RI)和混合稳定装置。为了限制所有方向运动,保持L4椎体底表面固定,并在L2椎体顶表面施加500N、10Nm力矩的轴向压缩力。测定IVD-23和IVD-34的屈曲、伸展、侧弯和轴向扭转时的活动范围(ROM)、椎间盘压力和应变(IVD)。结果表明,HSD模型的ROM高于RI,低于is模型。在临床实施任何植入物之前,本研究预测的生物力学参数可能会被考虑。
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引用次数: 8
Design of a Prototype for Vision Prosthesis 视觉假体的原型设计
V. B. Rao, P. Seetharamaiah, N. Sharmili
This article describes how the field of vision prostheses is currently being developed around the world to restore useful vision for people suffering from retinal degenerative diseases. The vision prosthesis system (VPS) maps visual images to electrical pulses and stimulates the surviving healthy parts in the retina of the eye, i.e. ganglion cells, using electric pulses applied through an electrode array. The retinal neurons send visual information to the brain. This article presents the design of a prototype vision prosthesis system which converts images/video into biphasic electric stimulation pulses for the excitation of electrodes simulated by an LED array. The proposed prototype laboratory model has been developed for the design of flexible high-resolution 1024-electrode VPS, using an embedded computer-based efficient control algorithm for better visual prediction. The prototype design for the VPS is verified visually through a video display on an LCD/LED array. The experimental results of VPS are enumerated for the test objects, such as, palm, human face and large font characters. The results were found to be satisfactory.
这篇文章描述了目前世界各地如何开发视觉假体来为患有视网膜退行性疾病的人恢复有用的视力。视觉假体系统(VPS)将视觉图像映射到电脉冲上,并使用通过电极阵列施加的电脉冲刺激眼睛视网膜中存活的健康部分,即神经节细胞。视网膜神经元向大脑发送视觉信息。本文介绍了一种视觉假体原型系统的设计,该系统将图像/视频转换为双相电刺激脉冲,并通过LED阵列模拟电极的激励。该原型实验室模型用于设计柔性高分辨率1024电极VPS,使用基于嵌入式计算机的高效控制算法进行更好的视觉预测。VPS的原型设计通过LCD/LED阵列上的视频显示进行了视觉验证。列举了VPS在手掌、人脸、大字等测试对象上的实验结果。结果是令人满意的。
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引用次数: 1
Micromotion Analysis of a Dental Implant System 牙种植体系统的微运动分析
Pub Date : 1900-01-01 DOI: 10.4018/978-1-7998-1690-4.ch010
R. Manimaran, Vamsi Krishna Dommeti, E. Nuțu, Sandipan Roy
The objective of project is to reduce the micromotion of novel implant under the static loads using function of uniform design for FE analysis. Integrating the features of regular implant, a new implant model has been done. Micromotion of the novel implant was obtained using static structural FE analysis. Compared to the existing International team for implantology implants, the micromotion of the novel implant model was considerably decreased by static structural analysis. Six control factors were taken for achieving minimizes the micromotion of novel dental implant system. In the present work, uniform design technique was used to create a set of finite element analysis simulation: according to the uniform design method, all FE analysis simulation; compared to the original model, the micromotion is 0.01944mm and micromotion of improved design version is 0.01244mm. The improvement rate for the micromotion is 35.02%.
本课题的目的是利用均匀设计函数进行有限元分析,以减少新型种植体在静载荷下的微动。结合常规种植体的特点,建立了一种新的种植体模型。采用静力结构有限元分析获得新型种植体的微动特性。与现有的国际团队种植体相比,通过静态结构分析,新型种植体模型的微动大大减少。采用6个控制因素来实现新型种植体系统的微运动最小化。在本工作中,采用均匀设计技术创建了一套有限元分析仿真:按均匀设计方法,全部进行有限元分析仿真;与原始模型相比,微动为0.01944mm,改进设计版本微动为0.01244mm。微动改良率为35.02%。
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引用次数: 0
Magnetic Nano-Systems in Drug Delivery and Biomedical Applications 磁性纳米系统在药物输送和生物医学应用
Pub Date : 1900-01-01 DOI: 10.4018/978-1-5225-4781-5.CH007
Saritha Shetty, A. Upadhya
Nanotechnology is that sphere of technology that involves the participation of biology, chemistry, physics, and engineering sciences. Nanoscale science defines the chemistry and physics of structures lying in the range of 1-100 nm. Among the nanosystems researched, magnetic nanosystems are highlighted due their unique ability, which enables their targeting to specific locations on application of an external magnetic field. The exhibited property of these magnetic nanosystems being super-paramagnetism, there is no retention of magnetic property on removal of the magnetic field, thus enabling a reversion of the targeting process. For effective utilization of these nanosystems, they should be reduced to nanosizes, layered with biocompatible entities, stabilized, and functionalized. In the chapter, synthesis and functionalization and stabilization are elucidated. The biomedical applications such as targeted delivery, MRI, magnetic hyperthermia, tissue engineering, gene delivery, magnetic immunotherapy, magnetic detoxification, and nanomagnetic actuation are discussed.
纳米技术是涉及生物、化学、物理和工程科学的技术领域。纳米尺度科学定义了1-100纳米范围内结构的化学和物理。在研究的纳米系统中,磁性纳米系统由于其独特的能力而受到重视,它可以在外加磁场的作用下定位到特定的位置。这些磁性纳米系统表现出超顺磁性,在磁场去除后磁性不会保留,从而实现了靶向过程的逆转。为了有效地利用这些纳米系统,它们应该缩小到纳米尺寸,与生物相容的实体分层,稳定和功能化。在这一章中,对合成、功能化和稳定化进行了阐述。讨论了定向递送、核磁共振、磁热疗、组织工程、基因递送、磁免疫治疗、磁解毒和纳米磁驱动等生物医学应用。
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引用次数: 1
Scaffolds and Tissue Engineering Applications by 3D Bio-Printing Process 3D生物打印技术在支架和组织工程中的应用
Pub Date : 1900-01-01 DOI: 10.4018/978-1-5225-8235-9.CH004
R. Barua, S. Datta, P. Datta, A. Chowdhury
3D bio-printing is a revolutionary manufacturing process that is widely used in medical fields especially in preparing bone scaffolds and tissue engineering. With the help of new biocompatible material like polymers, bio-gels, ceramics, this technology has created a new site in advanced tissue engineering and scaffolds manufacturing area. Another important thing is that, with the use of CAD file software, any complex design can be prepared (i.e., this technology does not have any limited sites). But here it is very much essential to study and analyze machine printability characteristics, cross-linking time and biocompatibility of printing objects as well as bio-ink. However, mechanical properties like shear thinning, mechanical elasticity are also required. In this chapter, different types of scaffold-preparing methods and the bio-printing process are discussed, which are used in scaffold and tissue engineering.
生物3D打印是一种革命性的制造技术,在医学领域尤其是骨支架的制备和组织工程方面有着广泛的应用。在聚合物、生物凝胶、陶瓷等新型生物相容性材料的帮助下,该技术在先进组织工程和支架制造领域开辟了新的领域。另一个重要的是,使用CAD文件软件,可以准备任何复杂的设计(即,这项技术没有任何场地限制)。但在此,研究和分析打印对象和生物墨水的机器可打印性、交联时间和生物相容性是非常必要的。然而,机械性能,如剪切减薄,机械弹性也是必需的。本章讨论了不同类型的支架制备方法和生物打印技术在支架和组织工程中的应用。
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引用次数: 7
Surgeon, Media, Society, Patient 外科医生,媒体,社会,病人
Pub Date : 1900-01-01 DOI: 10.4018/978-1-7998-8050-9.ch008
B. Lunceford
For many, cosmetic surgery holds the promise that one can reshape his or her body to remove perceived defects and thus have a more perfect body. However, the decision to undergo elective cosmetic surgery is not made in a vacuum, and it is easy to overlook the full range of ethical considerations surrounding cosmetic surgery. Many medical ethicists subscribe to an ethical code that centers mainly on the relationship between the doctor and patient, with a focus on respect for autonomy, nonmaleficence, beneficence, and justice. This chapter builds on this framework by extending the scope of actors to include not only the surgeon and the patient but also the media and the overall society. To illustrate this framework, the author uses the example of actress Heidi Montag, who underwent 10 different plastic surgery procedures in one day. The chapter concludes with a discussion of potential correctives for ethical failures in each of these areas.
对许多人来说,整容手术意味着人们可以重塑自己的身体,消除感知到的缺陷,从而拥有一个更完美的身体。然而,接受选择性整容手术的决定并不是在真空中做出的,而且很容易忽视围绕整容手术的各种伦理考虑。许多医学伦理学家都认同一种伦理准则,这种准则主要以医患关系为中心,强调尊重自主、无害、仁慈和正义。本章以这个框架为基础,扩展了行动者的范围,不仅包括外科医生和病人,还包括媒体和整个社会。为了说明这个框架,作者以女演员海蒂·蒙塔格为例,她在一天内接受了10次不同的整形手术。本章最后讨论了这些领域中道德失败的潜在纠正措施。
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引用次数: 0
Design of a Prosthetic Ankle Complex 一种踝关节复合假肢的设计
Pub Date : 1900-01-01 DOI: 10.4018/978-1-5225-8235-9.CH005
Dheeman Bhuyan, Kaushik Kumar
Nature has, over a large span of geological time, engineered near perfect solutions to most problems humans face today. Motion of the limbs is one such area, and the cutting edge in the development of effective prostheses is biomimetics. Limb prostheses have been used by mankind for the better part of known history, and most of the technology currently available in prosthetics is not exclusively new. However, modern prosthetics either are uncomfortable—and the lack of flexion affects the gait of the patient—or too expensive for a large segment of the populace. This chapter seeks to study the mimicry of physiological systems through the design for an ankle prosthesis that includes a passive damper and mimics the shape and behavior of the natural ankle joint.
在漫长的地质年代里,大自然为人类今天面临的大多数问题设计了近乎完美的解决方案。肢体的运动就是这样一个领域,而开发有效假肢的前沿是仿生学。在已知的历史中,假肢已经被人类使用了很长一段时间,目前在假肢中可用的大多数技术并不完全是新的。然而,现代义肢要么不舒服——而且缺乏屈曲性会影响病人的步态——要么对大部分人来说太贵。本章试图通过设计一个踝关节假体来研究生理系统的模仿,该假体包括一个被动阻尼器,并模仿自然踝关节的形状和行为。
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引用次数: 0
The Cochlear Implant as an Epistemic Thing 人工耳蜗作为一种认知的东西
Pub Date : 1900-01-01 DOI: 10.4018/978-1-5225-8933-4.ch009
Markus Spöhrer
This chapter examines the translations and (de)stabilizations of the cochlear implant, a subcutaneous prosthesis that is subject to ethical and judicial controversies. By looking at medical, social, and scientific contexts, the CI will be described as a technical object ascribed with certain attributes providing technical stability in those contexts that treat it and practice it as a scientific fact, a “technical thing.” Scientific communities stabilize technical things by rigorously excluding attributes of the “social.” However, the CI is designed to enable participation, to “gap” the supposed “disability” of not being able to hear, attributing a certain instability to it. The chapter will theoretically and methodologically approach such processes of (de)stabilization and transformation by making use of ANT and Hans-Jörg Rheinbergers concept of technical and epistemic things. This will be illustrated by analyzing certain discourses used as illustrations for the successful communication between implanted children and their parents in practical guides for parents with deaf children.
本章探讨了人工耳蜗的翻译和(去)稳定,这是一种受到伦理和司法争议的皮下人工耳蜗。通过查看医学、社会和科学环境,CI将被描述为具有某些属性的技术对象,在将其视为科学事实并将其作为“技术事物”进行实践的环境中提供技术稳定性。科学界通过严格排除“社会”属性来稳定技术事物。然而,CI的设计是为了使人们能够参与,“弥补”所谓的“残疾”,即听不到声音,将某种不稳定性归因于它。本章将利用ANT和Hans-Jörg莱茵伯格的技术和认识论概念,从理论上和方法上探讨这种(去)稳定和转化的过程。本文将通过分析聋儿父母实用指南中植入儿童与父母成功沟通的话语来说明这一点。
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引用次数: 1
Tailoring Humans 裁剪人类
Pub Date : 1900-01-01 DOI: 10.4018/978-1-5225-6310-5.CH014
Alexandra Huidu
What began as an attempt to eradicate serious illnesses seems to have become, in some cases, under the impetus of human imagination and technological evolution, an exercise by which scientists come to compete with the attributes of divinity: augmenting human beings at a basic level that affects the identity of the species. Genetic engineering for medical purposes has created the premises for the existence of technologies that can be used for other agendas, without medical purpose, in order to bioenhance the characteristics of the human individual. The genetic inheritance we leave to future generations is now under our control, because we are able to manipulate our germinal line. Hybrid embryos and chimeric embryos, although still in the experimental stage, can become a reality in relatively short time. But just because we can, do we have the right to do it? Do we need all of this and, if so, to what extent? What are the limits and who or what sets the standards? These are the questions that this chapter addresses from an ethical perspective.
在某些情况下,在人类想象力和技术进化的推动下,原本是为了根除严重疾病的尝试,似乎已经变成了科学家们与神性属性竞争的一种练习:在影响物种身份的基本层面上增强人类。以医疗为目的的基因工程为技术的存在创造了前提,这些技术可以用于其他议程,而不是医疗目的,以生物方式增强人类个体的特征。我们留给后代的基因遗传现在在我们的控制之下,因为我们能够操纵我们的生发线。杂交胚胎和嵌合胚胎虽然还处于实验阶段,但可以在较短的时间内成为现实。但是仅仅因为我们可以,我们就有权利这样做吗?我们需要这一切吗?如果需要,需要到什么程度?限制是什么,谁或什么设定了标准?这些都是本章从伦理的角度来探讨的问题。
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引用次数: 2
期刊
Research Anthology on Emerging Technologies and Ethical Implications in Human Enhancement
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