Journal articles on the topic 'Prosthesis hand'
To see the other types of publications on this topic, follow the link: Prosthesis hand.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Prosthesis hand.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Bergman, K., L. Örnholmer, K. Zackrisson, and M. Thyberg. "Functional benefit of an adaptive myoelectric prosthetic hand compared to a conventional myoelectric hand." Prosthetics and Orthotics International 16, no. 1 (April 1992): 32–37. http://dx.doi.org/10.3109/03093649209164305.
Full textAbstract:
Eight patients with a traumatic unilateral upper limb amputation, who used conventional myoelectric prostheses, were also fitted with a commercially available myoelectric prosthetic hand with an adaptive grip, in order to compare the functional benefit of the two types of prostheses. Comparisons were made regarding width of grip, force of grip, scores in a standardised grip function test and prosthesis preference. The conventional prosthesis showed significantly better results regarding these parameters. The adaptive hand does not appear to be fully developed for practical use in prosthetic rehabilitation.
2
Srimaneepong, Viritpon, Artak Heboyan, Azeem Ul Yaqin Syed, Hai Anh Trinh, Pokpong Amornvit, and Dinesh Rokaya. "Recent Advances in Myoelectric Control for Finger Prostheses for Multiple Finger Loss." Applied Sciences 11, no. 10 (May 14, 2021): 4464. http://dx.doi.org/10.3390/app11104464.
Full textAbstract:
The loss of one or multiple fingers can lead to psychological problems as well as functional impairment. Various options exist for replacement and restoration after hand or finger loss. Prosthetic hand or finger prostheses improve esthetic outcomes and the quality of life for patients. Myoelectrically controlled hand prostheses have been used to attempt to produce different movements. The available articles (original research articles and review articles) on myoelectrically controlled finger/hand prostheses from January 1922 to February 2021 in English were reviewed using MEDLINE/PubMed, Web of Science, and ScienceDirect resources. The articles were searched using the keywords “finger/hand loss”, “finger prosthesis”, “myoelectric control”, and “prostheses” and relevant articles were selected. Myoelectric or electromyography (EMG) signals are read by myoelectrodes and the signals are amplified, from which the muscle’s naturally generated electricity can be measured. The control of the myoelectric (prosthetic) hands or fingers is important for artificial hand or finger movement; however, the precise control of prosthetic hands or fingers remains a problem. Rehabilitation after multiple finger loss is challenging. Implants in finger prostheses after multiple finger loss offer better finger prosthesis retention. This article presents an overview of myoelectric control regarding finger prosthesis for patients with finger implants following multiple finger loss.
3
Ng, Ka Ho, Vaheh Nazari, and Monzurul Alam. "Can Prosthetic Hands Mimic a Healthy Human Hand?" Prosthesis 3, no. 1 (January 28, 2021): 11–23. http://dx.doi.org/10.3390/prosthesis3010003.
Full textAbstract:
Historical evidence suggests that prostheses have been used since ancient Egyptian times. Prostheses were usually utilized for function and cosmetic appearances. Nowadays, with the advancement of technology, prostheses such as artificial hands can not only improve functional, but have psychological advantages as well and, therefore, can significantly enhance an individual’s standard of living. Combined with advanced science, a prosthesis is not only a simple mechanical device, but also an aesthetic, engineering and medical marvel. Prosthetic limbs are the best tools to help amputees reintegrate into society. In this article, we discuss the background and advancement of prosthetic hands with their working principles and possible future implications. We also leave with an open question to the readers whether prosthetic hands could ever mimic and replace our biological hands.
4
Cuellar, Juan Sebastian, Gerwin Smit, Paul Breedveld, Amir Abbas Zadpoor, and Dick Plettenburg. "Functional evaluation of a non-assembly 3D-printed hand prosthesis." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 233, no. 11 (September 6, 2019): 1122–31. http://dx.doi.org/10.1177/0954411919874523.
Full textAbstract:
In developing countries, the access of amputees to prosthetic devices is very limited. In a way to increase accessibility of prosthetic hands, we have recently developed a new approach for the design and 3D printing of non-assembly active hand prostheses using inexpensive 3D printers working on the basis of material extrusion technology. This article describes the design of our novel 3D-printed hand prosthesis and also shows the mechanical and functional evaluation in view of its future use in developing countries. We have fabricated a hand prosthesis using 3D printing technology and a non-assembly design approach that reaches certain level of functionality. The mechanical resistance of critical parts, the mechanical performance, and the functionality of a non-assembly 3D-printed hand prosthesis were assessed. The mechanical configuration used in the hand prosthesis is able to withstand typical actuation forces delivered by prosthetic users. Moreover, the activation forces and the energy required for a closing cycle are considerably lower as compared to other body-powered prostheses. The non-assembly design achieved a comparable level of functionality with respect to other body-powered alternatives. We consider this prosthetic hand a valuable option for people with arm defects in developing countries.
5
Sjöberg, Lis, Helen Lindner, and Liselotte Hermansson. "Long-term results of early myoelectric prosthesis fittings: A prospective case-control study." Prosthetics and Orthotics International 42, no. 5 (September 14, 2017): 527–33. http://dx.doi.org/10.1177/0309364617729922.
Full textAbstract:
Background: Different recommendations exist regarding what age is best for first-time fitting of myoelectric hand prostheses in children. Objectives: To compare prosthetic skill, prosthetic use and risk for rejection over time between children fitted with myoelectric hand prostheses before or after 2½ years of age. Study design: Prospective case-control design. Methods: The cases were nine children fitted with myoelectric hand prostheses before the age of 2½ years, whereas the controls were 27 children who were fitted with myoelectric hand prostheses after the age of 2½ years. The Skills Index Ranking Scale was used to classify prosthetic skill, and prosthetic use was categorised based on wearing time and pattern. Independent samples tests were used to compare data between groups. To estimate and compare the risk of prosthesis rejection between groups and over time, survival analysis was used. Results: Cases showed prosthetic skill early, but controls had caught up by the age of 3½ years. Cases had a significant ( p = 0.046) decrease in prosthetic use at the age of 9 years. In the long term, cases had a higher percentage of prosthesis rejection. Conclusions: Considering young children’s development of prosthetic skill and prosthetic use over time, this study shows no additional advantages from fitting a myoelectric hand prosthesis before 2½ years of age. Clinical relevance Children may be fitted with myoelectric hand prostheses to assist in daily tasks and to prevent future over-use problems. Most children fitted with myoelectric hand prostheses before 4 years of age become regular users. No advantages of fitting myoelectric hand prostheses before 2½ years of age were observed.
6
Ige, Ebenezer Olubunmi, Adedotun Adetunla, Adedamola Awesu, and Oluwaseun K. Ajayi. "Sensitivity Analysis of a Smart 3D-Printed Hand Prosthetic." Journal of Robotics 2022 (February 24, 2022): 1–9. http://dx.doi.org/10.1155/2022/9145352.
Full textAbstract:
In this study, prosthesis performance was examined in the direction of prosthesis comfort, which may be incorporated into clinical practice as considerations for the fabrication of patient-specific prostheses. The need to produce patient-specific prosthetics is very germane to assist in orthopedic and trans-radial amputation medicine. The prosthesis makes use of a relatively simple brain-computer interface that receives electroencephalogram (EEG) signals as input and drives actuators connected to cables to actuate the 3D-printed fingers and the wrist. Both mechanical and electrical simulations were carried out to investigate the response to loading conditions, after which sensitivity analysis was conducted to validate the prosthesis performance.
7
Maat, Bartjan, Gerwin Smit, Dick Plettenburg, and Paul Breedveld. "Passive prosthetic hands and tools: A literature review." Prosthetics and Orthotics International 42, no. 1 (March 1, 2017): 66–74. http://dx.doi.org/10.1177/0309364617691622.
Full textAbstract:
Background: The group of passive prostheses consists of prosthetic hands and prosthetic tools. These can either be static or adjustable. Limited research and development on passive prostheses has been performed although many people use these prosthesis types. Although some publications describe passive prostheses, no recent review of the peer-reviewed literature on passive prostheses is available. Objective: Review the peer-reviewed literature on passive prostheses for replacement of the hand. Study design: Literature review. Methods: Four electronic databases were searched using a Boolean combination of relevant keywords. English-language articles relevant to the objective were selected. Results: In all, 38 papers were included in the review. Publications on passive prosthetic hands describe their users, usage, functionality, and problems in activities of daily living. Publications on prosthetic tools mostly focus on sport, recreation, and vehicle driving. Conclusion: Passive hand prostheses receive little attention in prosthetic research and literature. Yet one out of three people with a limb deficiency uses this type of prosthesis. Literature indicates that passive prostheses can be improved on pulling and grasping functions. In the literature, ambiguous names are used for different types of passive prostheses. This causes confusion. We present a new and clear classification of passive prostheses. Clinical relevance This review provides information on the users of passive prosthetic hands and tools, their usage and the functionality. Passive prostheses receive very little attention and low appreciation in literature. Passive prosthetic hands and tools show to be useful to many unilateral amputees and should receive more attention and higher acceptance.
8
DÍAZ-MONTES, JULIO C., and JESÚS M. DORADOR-GONZÁLEZ. "PROPOSAL OF CRITERIA FOR THE EVALUATION OF PRECISION AND FORCE IN HAND PROSTHESES." Journal of Mechanics in Medicine and Biology 18, no. 02 (March 2018): 1850010. http://dx.doi.org/10.1142/s0219519418500100.
Full textAbstract:
There are indicators useful to measure the grasp quality of prostheses, two of them are the force that can be reached, and the precision needed to grasp an object. It is important to evaluate force and precision in hand prostheses because these characteristics are directly related to its performance and to the activities that can be done with it. Nowadays, there are no available criteria to evaluate these two characteristics. Existing criteria can be applied only in particular situations and can be applied only to a few prosthetic devices to obtain a general evaluation. This paper presents a proposal for criteria able to evaluate precision and force in-hand prosthetic devices. These criteria have three main original characteristics: Each system in the prosthesis is evaluated individually; quantitative information about its performance is obtained; the criteria can be used for evaluating most of the existing prosthetic devices. In order to show the application and use of the criteria the evaluation of two devices is presented: CDMIT© and SmartHand©. Prosthesis evaluation results show that both prosthesis have some particular aspects that can be improved, and thus reach a higher force and better precision. Criteria presented in this paper serve for stablishing a framework useful for compare several prosthesis in various aspects.
9
Lee, Keun Ho, Sung Jae Kim, Yong Ho Cha, Jae Lim Kim, Dong Kyu Kim, and Sang Jun Kim. "Three-dimensional printed prosthesis demonstrates functional improvement in a patient with an amputated thumb: A technical note." Prosthetics and Orthotics International 42, no. 1 (December 20, 2016): 107–11. http://dx.doi.org/10.1177/0309364616679315.
Full textAbstract:
Background and Aim: Three-dimensional printer is widely used in industry, biology, and medical fields. We report a finger prosthesis produced by a three-dimensional scanner and printer for a 67-year-old man with a right thumb amputation above the metacarpophalangeal joint. Technique: His right amputated and left intact hands were scanned with a three-dimensional scanner, and the left-hand image was rotated to the right side to design the right thumb prosthesis. The designed prosthesis was printed with a three-dimensional printer using the fused filament fabrication output system. Discussion: The Jebsen–Taylor hand function test and Box and Block Test scores improved after application of the prosthesis. Most Quebec User Evaluation of Satisfaction with Assistive Technology results were “very satisfied,” and most Orthotics and Prosthetics Users’ Survey results were “very easy.” Preparing the prosthesis made by three-dimensional scanner and three-dimensional printer was faster and cheaper than preparing a conventional prosthesis. Clinical relevance Using three-dimensional scanning and printing technique, we can easily produce specifically shaped finger prostheses for specific movements in amputated patients with low cost.
10
Frey, Scott, Binal Motawar, Kelli Buchanan, Christina Kaufman, Phil Stevens, Carmen Cirstea, and Sean Morrow. "Greater and More Natural Use of the Upper Limbs During Everyday Life by Former Amputees Versus Prosthesis Users." Neurorehabilitation and Neural Repair 36, no. 3 (January 7, 2022): 227–38. http://dx.doi.org/10.1177/15459683211062889.
Full textAbstract:
Hand loss profoundly impacts daily functioning. Reversal of amputation through hand replantation or transplantation offers an alternative to prosthetics for some. Whether recipients exhibit more extensive and natural limb use during everyday life than prosthesis users is, however, unknown. We asked unilateral, below-elbow amputees (N = 22), hand graft recipients (transplants N = 4; replants N = 2), and healthy matched controls (N = 20) to wear wireless accelerometers distally on their forearms/prostheses and proximally on their upper arms. These units captured limb activity over 3 days within participants’ natural environments. Graft recipients exhibited heavier reliance on their affected hands compared to amputees’ reliance on their prostheses, P < .001. Likewise, reliance on the injured side upper arm was also greater for hand graft recipients than amputees, regardless of whether they were wearing their prostheses, P < .05 in both cases. Hand graft recipients, like healthy controls, also relied more on forearm vs upper arm movements when controlling their limbs, P < .001. Compared with conventional prosthesis users, graft recipients exhibited more extensive and natural functioning of the upper limbs during everyday activities. This information is an important addition to other considerations when evaluating risk-benefit of these treatment alternatives.
11
Datta, D., and V. Ibbotson. "Powered prosthetic hands in very young children." Prosthetics and Orthotics International 22, no. 2 (August 1998): 150–54. http://dx.doi.org/10.3109/03093649809164477.
Full textAbstract:
Myoelectric prostheses are generally not provided in the United Kingdom for children before the age of 3 1/2 years. Following the introduction of a smaller sized electric hand in the United Kingdom in 1993 the authors decided to introduce electrically powered hands for a group of congenital upper limb deficient children at a much younger age compared to normal practice. Eleven children were introduced to powered prosthetic hands at an averrtge age of 20.6 months. At the review camed out for the purpose of this paper, 72.7% of these children appeared to be successfully using these powered prostheses. Fitting these young children with powered prostheses and encouraging acceptance and operation of the prostheses appeared to be much less of a problem than might have been anticipated. The parents of all these children have very much liked the introduction of powered hands at this early age and have contributed positively, to the prosthetic programme. The authors' experience suggests that introduction of a powered prosthesis at a much earlier age can be a more suitable alternative than provision of a body-powered prosthetic device while waiting to reach an older age before a powered prosthesis is considered.
12
Joyce, T. J., and A. Unsworth. "A LITERATURE REVIEW OF "FAILURES" OF THE SWANSON FINGER PROSTHESIS IN THE METACARPOPHALANGEAL JOINT." Hand Surgery 07, no. 01 (July 2002): 139–46. http://dx.doi.org/10.1142/s0218810402000881.
Full textAbstract:
This paper reviews the use of the Swanson finger prosthesis, concentrating on clinical results from the metacarpophalangeal (MCP) joint and modes of prosthetic "failure". While "failure" is generally associated with fracture, it is recognised that fracture does not always necessitate replacement of the Swanson prosthesis. Fracture tends to occur at the junction of the distal stem and hinge of the prosthesis. Initial improvements in ulnar deviation and range of motion (ROM) tend to be gradually reduced over the duration of implantation, and there is little evidence to suggest any long-term improvement in hand strength. Bone erosion and silicone synovitis have been seen but at a much lesser incidence than in other joints implanted with silicone spacers. An evaluation of retrieved Swanson prostheses, tied in with patient history and hand measurements might provide additional information to improve the design of the Swanson prosthesis itself and of other finger prostheses.
13
Alturkistani, Raghad, Kavin A, Suresh Devasahayam, Raji Thomas, Esther L. Colombini, Carlos A. Cifuentes, Shervanthi Homer-Vanniasinkam, Helge A. Wurdemann, and Mehran Moazen. "Affordable passive 3D-printed prosthesis for persons with partial hand amputation." Prosthetics and Orthotics International 44, no. 2 (February 26, 2020): 92–98. http://dx.doi.org/10.1177/0309364620905220.
Full textAbstract:
Background and Aim: Partial hand amputations are common in developing countries and have a negative impact on patients and their families’ quality of life. The uniqueness of each partial hand amputation, coupled with the relatively high costs of prostheses, makes it challenging to provide suitable prosthetic solutions in developing countries. Current solutions often have long lead times and require a high level of expertise to produce. The aim of this study was to design and develop an affordable patient-specific partial hand prosthesis for developing countries. Technique: The prosthesis was designed for a patient with transmetacarpal amputation (i.e. three amputated fingers and partial palm). The final design was passive, controlled by the contralateral hand, and utilized the advanced flexibility properties of thermoplastic polyurethane in a glove-like design that costs approximately 20 USD to fabricate. Quantitative and qualitative tests were conducted to assess performance of the device after the patient used the final design. A qualitative assessment was performed to gather the patient’s feedback following a series of tests of grasp taxonomy. A quantitative assessment was performed through a grasp and lift test to measure the prosthesis’ maximum load capacity. Discussion: This study showed that the prosthesis enhanced the patient’s manual handling capabilities, mainly in the form of grasp stability. The prosthesis was light weight and could be donned and doffed by the patient independently. Limitations include the need to use the contralateral hand to achieve grasping and low grasp strength. Clinical relevance Persons with partial hand amputation in developing countries lack access to affordable functional prostheses, hindering their ability to participate in the community. 3D-printed prostheses can provide a low-cost solution that is adaptable to different amputation configurations.
14
Carey, Stephanie L., Matthew M. Wernke, Derek J. Lura, Jason T. Kahle, Rajiv V. Dubey, and M. Jason Highsmith. "Golf hand prosthesis performance of transradial amputees." Prosthetics and Orthotics International 39, no. 3 (February 25, 2014): 244–49. http://dx.doi.org/10.1177/0309364614523979.
Full textAbstract:
Background: Typical upper limb prostheses may limit sports participation; therefore, specialized terminal devices are often needed. The purpose of this study was to evaluate the ability of transradial amputees to play golf using a specialized terminal device. Case description and methods: Club head speed, X-factor, and elbow motion of two individuals with transradial amputations using an Eagle Golf terminal device were compared to a non-amputee during a golf swing. Measurements were collected pre/post training with various stances and grips. Findings and outcomes: Both prosthesis users preferred a right-handed stance initially; however, after training, one preferred a left-handed stance. The amputees had slower club head speeds and a lower X-factor compared to the non-amputee golfer, but increased their individual elbow motion on the prosthetic side after training. Conclusion: Amputees enjoyed using the device, and it may provide kinematic benefits indicated by the increase in elbow flexion on the prosthetic side. Clinical relevance The transradial amputees were able to swing a golf club with sufficient repetition, form, and velocity to play golf recreationally. Increased elbow flexion on the prosthetic side suggests a potential benefit from using the Eagle Golf terminal device. Participating in recreational sports can increase amputees’ health and quality of life.
15
Dursun, Melis, and Bahar Şener Pedgley. "ELICITING CHILDREN'S EXPECTATIONS FOR HAND PROSTHESES THROUGH GENERATIVE DESIGN TOOLS." Proceedings of the Design Society 1 (July 27, 2021): 1343–52. http://dx.doi.org/10.1017/pds.2021.134.
Full textAbstract:
AbstractWhen designing assistive devices for children with disabilities, designers mostly consider technical and functional aspects and overlook factors that affect their usage from children’s perspective. Therefore, in most cases, assistive devices do not fully meet the needs of the children and may create a negative effect on children’s well-being. To explore the opinion’s of children using 3D printed hand prosthetics in Country-Xx, individual generative sessions were conducted with four children with limb deficiency. Generative tools are used to engage children and encourage them to express themselves in relation to prosthesis use. The main aim was to investigate how children provide design relevant information that may help designers to achieve improved assistive devices that support children’s physical, emotional and social wellbeing. Children’s feedback related to prosthetic usage categorized under two topics; expectations of children for prosthesis use and children’s priority expectation for the prosthesis. The findings are argued to be useful and usable by NGOs, product designers and design researchers who work with children with disabilities.
16
Swartz, Ashley Quinn, Kristi Turner, Laura Miller, and Todd Kuiken. "Custom, rapid prototype thumb prosthesis for partial-hand amputation: A case report." Prosthetics and Orthotics International 42, no. 2 (June 22, 2017): 187–90. http://dx.doi.org/10.1177/0309364617706421.
Full textAbstract:
Background: Due to advancements in three-dimensional printing, custom-made prostheses are becoming more viable options for persons with difficult cases of prosthetic management. The purpose of this article was to develop a custom voluntary-closing, body-powered thumb mechanism for a partial-hand amputee who had amputations of the index finger and thumb on the left, non-dominant hand. Case description and methods: The prosthesis model was manufactured using rapid prototype technology and was developed to provide greater force and functionality, and to decrease overall size compared to traditional hand prostheses. Findings and outcomes: Following device iterations and occupational therapy sessions, the patient achieved higher functionality in performing daily tasks such as cooking and cleaning, and in completing the Box and Blocks test, though some limitations still precluded full acceptance of the device. Conclusion: This case study represents a unique approach in the development of custom-made devices that may increase prostheses acceptance rates among partial-hand amputees. Clinical relevance Many partial-hand amputees report experiencing trouble in finding a device that fits their needs. This study highlights the potential of using rapid prototyping technology to design a prosthesis that meets a user’s specific desires.
17
Zuniga, Jorge M., Adam M. Carson, Jean M. Peck, Thomas Kalina, Rakesh M. Srivastava, and Kirk Peck. "The development of a low-cost three-dimensional printed shoulder, arm, and hand prostheses for children." Prosthetics and Orthotics International 41, no. 2 (April 26, 2016): 205–9. http://dx.doi.org/10.1177/0309364616640947.
Full textAbstract:
Background and aim: The prosthetic options for higher level amputees are limited and costly. Advancements in computer-aided design programs and three-dimensional printing offer the possibility of designing and manufacturing transitional prostheses at very low cost. The aim of this project was to describe an inexpensive three-dimensional printed mechanical shoulder prosthesis to assist a pre-selected subject in performing bi-manual activities. Technique: The main function of the body-powered, manually adjusted three-dimensional printed shoulder prosthesis is to provide a cost-effective, highly customized transitional device to individuals with congenital or acquired forequarter amputations. Discussion: After testing the prototype on a young research participant, a partial correction of the patient’s spinal deviation was noted due to the counterweight of the device. The patient’s family also reported improved balance and performance of some bimanual activities after 2 weeks of using the device. Limitations of the design include low grip strength and low durability. Clinical relevance The prosthetic options for higher level amputees are limited and costly. The low-cost three-dimensional printed shoulder prosthesis described in this study can be used as a transitional device in preparation for a more sophisticated shoulder prosthesis.
18
Laffranchi, M., N. Boccardo, S. Traverso, L. Lombardi, M. Canepa, A. Lince, M. Semprini, et al. "The Hannes hand prosthesis replicates the key biological properties of the human hand." Science Robotics 5, no. 46 (September 23, 2020): eabb0467. http://dx.doi.org/10.1126/scirobotics.abb0467.
Full textAbstract:
Replacing the human hand with artificial devices of equal capability and effectiveness is a long-standing challenge. Even the most advanced hand prostheses, which have several active degrees of freedom controlled by the electrical signals of the stump’s residual muscles, do not achieve the complexity, dexterity, and adaptability of the human hand. Thus, prosthesis abandonment rate remains high due to poor embodiment. Here, we report a prosthetic hand called Hannes that incorporates key biomimetic properties that make this prosthesis uniquely similar to a human hand. By means of an holistic design approach and through extensive codevelopment work involving researchers, patients, orthopaedists, and industrial designers, our proposed device simultaneously achieves accurate anthropomorphism, biomimetic performance, and human-like grasping behavior that outperform what is required in the execution of activities of daily living (ADLs). To evaluate the effectiveness and usability of Hannes, pilot trials on amputees were performed. Tests and questionnaires were used before and after a period of about 2 weeks, in which amputees could autonomously use Hannes domestically to perform ADLs. Last, experiments were conducted to validate Hannes’s high performance and the human likeness of its grasping behavior. Although Hannes’s speed is still lower than that achieved by the human hand, our experiments showed improved performance compared with existing research or commercial devices.
19
Burger, H., and Č. Marinček. "Upper limb prosthetic use in Slovenia." Prosthetics and Orthotics International 18, no. 1 (April 1994): 25–33. http://dx.doi.org/10.3109/03093649409164667.
Full textAbstract:
The article deals with the use of different types of upper limb prostheses in Slovenia. Four hundred and fourteen upper limb amputees were sent a questionnaire on the type of their prosthesis, its use and reasons for non-use, respectively. The replies were subject to statistical analysis. Most of the questioned upper limb amputees (70%) wear a prosthesis only for cosmesis. The use of a prosthesis depends on the level of upper limb amputation, loss of the dominant hand, and time from amputation. Prosthetic success appears to be unrelated to age at the time of amputation and the rehabilitation programme. The most frequent reason for not wearing a prosthesis is heat and consequent sweating of the stump. More than a third of amputees are dissatisfied with their prostheses.
20
Delepine, G., F. Delepine, T. Sokolov, and N. Delepine. "Hand-Modelled Composite Prostheses after Resection of Peri-Acetabular Bone Malignancies." Sarcoma 7, no. 1 (2003): 19–27. http://dx.doi.org/10.1080/1357714031000114174.
Full textAbstract:
Purpose: To improve function after pelvic resection involving the acetabulum, using an anatomic composite implant built with screws and cement.Material and method: Since 1990, 66 patients with peri-acetabular bone malignancies have been treated by extensive resection followed by hand-modelled innominate prosthesis with partially constrained total hip prosthesis. The hand-modelled innominate prosthesis was made of a titanium cup, a set of long titanium screws and two or three packs of gentamycine-loaded cement.Results: Many postoperative complications were observed: deep infection (14%), hip prosthesis dislocation (25%) and local recurrence (15%). Sixteen patients (25%) had to be reoperated. Nevertheless, at last follow-up, 62 patients still had composite prosthesis. The mean functional result, rated according to a modified Enneking's staging system, was 80% with unlimited walking without support, average hip flexion 100°, length discrepancy less than 1 cm.Discussion: These results were similar to those described in the literature for custom-made innominate prostheses and much better than those of alternative reconstructive procedures. Hand-modelled composite prostheses are cheaper, easier, more adaptable and enables better anchorage than custom-made prostheses. Such a procedure can be used even after total iliac wing resection.Conclusion: The advantages of such a procedure plead for its extensive use after acetabular resection. But long-term follow-up is necessary to validate indications.
21
Kuret, Zala, Helena Burger, Gaj Vidmar, and Tomaz Maver. "Impact of silicone prosthesis on hand function, grip power and grip-force tracking ability after finger amputation." Prosthetics and Orthotics International 40, no. 6 (July 10, 2016): 744–50. http://dx.doi.org/10.1177/0309364615596064.
Full textAbstract:
Background: Literature mostly describes the cosmetic role of prostheses for finger amputation. The impact on hand function has not been systematically explored. Objectives: Our aim was to describe the impact of silicone finger prostheses on hand function and gripping ability. Study design: Prospective descriptive cross-sectional study. Methods: We included 42 adult patients with partial or complete single- or multiple-digit amputation of one hand. We evaluated hand function of the injured hand without and with the prosthesis with the Southampton Hand Assessment Procedure, and grip power and tracking ability with a grip-force tracking system. Results: Southampton Hand Assessment Procedure grip index scores were slightly higher when using the prosthesis as compared to not using it (though not reaching the minimum real difference reported in the literature), except for lateral grip. Grip power was not significantly affected by prosthesis use for power grip and lateral grip and slightly diminished for tip grip. Tracking errors only differed with respect to the signal type but not with respect to using the prosthesis. Conclusion: A minimum improvement of hand function can be expected at best with silicone prostheses for finger amputation, accompanied by a slight decrease in tip grip power. Clinical relevance Based on our results, an evidence-based explanation can be given to patients after finger amputation regarding the functional benefits that can be expected from a silicone prosthesis.
22
Widehammar, Cathrine, Ingvor Pettersson, Gunnel Janeslätt, and Liselotte Hermansson. "The influence of environment: Experiences of users of myoelectric arm prosthesis—a qualitative study." Prosthetics and Orthotics International 42, no. 1 (May 4, 2017): 28–36. http://dx.doi.org/10.1177/0309364617704801.
Full textAbstract:
Background: Prostheses are used to varying degrees; however, little is known about how environmental aspects influence this use. Objectives: To describe users’ experiences of how environmental factors influence their use of a myoelectric arm prosthesis. Study design: Qualitative and descriptive. Methods: A total of 13 patients previously provided with a myoelectric prosthetic hand participated. Their age, sex, deficiency level, etiology, current prosthesis use, and experience varied. Semi-structured interviews were audiotaped, transcribed, and analyzed through inductive content analysis. Results: Four categories were created from the data: “Prosthesis function,” “Other people’s attitudes,” “Support from family and healthcare,” and “Individual’s attitude and strategies.” The overarching theme, “Various degrees of embodiment lead to different experiences of environmental barriers and facilitators,” emerged from differences in individual responses depending on whether the individual was a daily or a non-daily prosthesis user. Environmental facilitators such as support from family and healthcare and good function and fit of the prosthesis seemed to help the embodiment of the prosthesis, leading to daily use. This embodiment seemed to reduce the influence of environmental barriers, for example, climate, attitudes, and technical shortcomings. Conclusion: Embodiment of prostheses seems to reduce the impact of environmental barriers. Support and training may facilitate the embodiment of myoelectric prosthesis use. Clinical relevance For successful prosthetic rehabilitation, environmental factors such as support and information to the patient and their social network about the benefits of prosthesis use are important. Local access to training in myoelectric control gives more people the opportunity to adapt to prosthesis use and experience less environmental barriers.
23
Buccino, Federica, Alessandro Bunt, Alex Lazell, and Laura Maria Vergani. "Mechanical Design Optimization of Prosthetic Hand’s Fingers: Novel Solutions towards Weight Reduction." Materials 15, no. 7 (March 26, 2022): 2456. http://dx.doi.org/10.3390/ma15072456.
Full textAbstract:
From the mechanical function of grabbing objects to the emotional aspect of gesturing, the functionality of human hands is fundamental for both physical and social survival. Therefore, the loss of one or both hands represents a devastating issue, exacerbated by long rehabilitation times and psychological treatments. Prosthetic arms represent an effective solution to provide concrete functional and esthetical support. However, commercial hand prostheses still lack an optimal combination of light weight, durability, adequate cosmetic appearance, and affordability. Among these aspects, the priority for upper-limb prosthesis users is weight, a key parameter that influences both the portability and the functionality of the system. The purpose of this work is to optimize the design of the MyHand prosthesis, by redesigning both the proximal and distal finger and thumb in light of finding an optimal balance between weight reduction and adequate stiffness. Starting from elastic–plastic numerical models and experimental tests on obsolete components, analyzed under the worst loading condition, five different design solutions are suggested. An iterative topology optimization process locates the regions where material removal is permitted. From these results, 2 mm geometrical patterns on the top surface of the hand prosthesis appear as the most prominent, preventing object intrusion.
24
Li, Tao, Huaiqi Huang, Christian Antfolk, Jörn Justiz, and Volker M. Koch. "Tactile display on the remaining hand for unilateral hand amputees." Current Directions in Biomedical Engineering 2, no. 1 (September 1, 2016): 399–403. http://dx.doi.org/10.1515/cdbme-2016-0089.
Full textAbstract:
AbstractHuman rely profoundly on tactile feedback from fingertips to interact with the environment, whereas most hand prostheses used in clinics provide no tactile feedback. In this study we demonstrate the feasibility to use a tactile display glove that can be worn by a unilateral hand amputee on the remaining healthy hand to display tactile feedback from a hand prosthesis. The main benefit is that users could easily distinguish the feedback for each finger, even without training. The claimed advantage is supported by preliminary tests with healthy subjects. This approach may lead to the development of effective and affordable tactile display devices that provide tactile feedback for individual fingertip of hand prostheses.
25
Jung, Sung-Yoon, Seung-Gi Kim, Joo-Hyung Kim, and Se-Hoon Park. "Development of Multifunctional Myoelectric Hand Prosthesis System with Easy and Effective Mode Change Control Method Based on the Thumb Position and State." Applied Sciences 11, no. 16 (August 9, 2021): 7295. http://dx.doi.org/10.3390/app11167295.
Full textAbstract:
Commercial multi-degrees-of-freedom (multi-DOF) myoelectric hand prostheses can perform various hand gestures and grip motions using multiple DOFs. However, as most upper limb amputees have less than two electromyogram (EMG) signals generated at the amputation site, it is difficult to control various hand gestures and grip motions using multi-DOF myoelectric hand prostheses. This paper proposes a multifunctional myoelectric hand prosthesis system that uses only two EMG sensors while improving the convenience of upper limb amputees in everyday life. The proposed system comprises a six-DOF myoelectric hand prosthesis and an easy and effective control algorithm that enables upper limb amputees to perform various hand gestures and grip motions. More specifically, the hand prosthesis has a multi-DOF five-finger mechanism and a small controller that can be mounted inside the hand, allowing it to perform various hand gestures and grip motions. The control algorithm facilitates four grip motions and four gesture motions using the adduction and abduction positions of the thumb, the flexion and extension state of the thumb, and three EMG signals (co-contraction, flexion, and extension) generated using the two EMG sensors. Experimental results indicate that the proposed system is a versatile, flexible, and effective hand prosthesis system for upper limb amputees.
26
Salem, Fathia H. A., Khaled S. Mohamed, Sundes B. K. Mohamed, and Amal A. El Gehani. "The Development of Body-Powered Prosthetic Hand Controlled by EMG Signals Using DSP Processor with Virtual Prosthesis Implementation." Conference Papers in Engineering 2013 (June 16, 2013): 1–8. http://dx.doi.org/10.1155/2013/598945.
Full textAbstract:
The state of the art in the technology of prosthetic hands is moving rapidly forward. However, there are only two types of prosthetic hands available in Libya: the Passive Hand and the Mechanical Hand. It is very important, therefore, to develop the prosthesis existing in Libya so that the use of the prosthesis is as practical as possible. Considering the case of amputation below the elbow, with two movements: opening and closing the hand, this work discusses two stages: developing the operation of the body-powered prosthetic hand by controlling it via the surface electromyography signal (sEMG) through dsPIC30f4013 processor and a servo motor and a software based on fuzzy logic concept to detect and process the EMG signal of the patient as well as using it to train the patient how to control the movements without having to fit the prosthetic arm. The proposed system has been practically implemented, tested, and gave satisfied results, especially that the used processor provides fast processing with high performance compared to other types of microcontrollers.
27
Eshraghi, Arezoo, Jaeeun Yoo, James Klein, Ian Mckenzie, Gabrielle Sebaldt, Matthew Leineweber, Lisa Artero, Sandra Ramdial, and Jan Andrysek. "A custom, functional and lifelike passive prosthetic hand for infants and small toddlers: Clinical note." Prosthetics and Orthotics International 44, no. 3 (April 17, 2020): 180–84. http://dx.doi.org/10.1177/0309364620909276.
Full textAbstract:
Background and Aim: For infants and small toddlers with congenital upper limb deficiencies, terminal devices mainly provide either cosmesis or functionality. We report a clinical note about fitting a child with a low-cost passive hand targeting both functionality and cosmesis. Technique: An elastomeric, alloy-wire-reinforced hand was fabricated using additive manufacturing to allow independent positioning of the digits. A clinical pilot in-home evaluation was conducted on a child with upper limb loss. Discussion: The fabricated hand met the functional requirements but required a cover for cosmesis due to a poor surface finish associated with the fabrication technique. The participant child was comfortable using the prosthesis for various tasks. The parents were satisfied with the hand’s function and cosmesis when covered with a cosmetic glove. This work demonstrated a new design and process that may in the future improve the utilization of prosthetic hands to promote early prosthesis use and a child’s development. Clinical relevance Early prosthesis use is important for infants and toddlers. Additive manufacturing may enable the fabrication of custom passive prosthetic hands that provide both cosmesis and functionality.
28
Smit, Gerwin, and Dick H. Plettenburg. "Efficiency of Voluntary Closing Hand and Hook Prostheses." Prosthetics and Orthotics International 34, no. 4 (December 2010): 411–27. http://dx.doi.org/10.3109/03093646.2010.486390.
Full textAbstract:
The Delft Institute of Prosthetics and Orthotics has started a research program to develop an improved voluntary closing, body-powered hand prosthesis. Five commercially available voluntary closing terminal devices were mechanically tested: three hands [Hosmer APRL VC hand, Hosmer Soft VC Male hand, Otto Bock 8K24] and two hooks [Hosmer APRL VC hook, TRS Grip 2S]. The test results serve as a design guideline for future prostheses. A test bench was used to measure activation cable forces and displacements, and the produced pinch forces. The measurements show that the hands require higher activation forces than the hooks and 1.5–8 times more mechanical work. The TRS hook requires the smallest activation force (33 N for a 15 N pinch force) and has the lowest energy dissipation (52 Nmm). The Hosmer Soft hand requires the largest activation force (131 N for a 15 N pinch force) and has the highest energy dissipation (1409 Nmm). The main recommendations for future prostheses are the following: (1) Required activation forces should be below the critical muscle force (∼ 18% of maximum), to enable continuous activation without muscle fatigue; and (2) hysteresis of mechanism and glove should be lowered, to increase efficiency and controllability.
29
Nishikawa, Kotaro, Kentaro Hirata, and Masahiro Takaiwa. "Development of Self-Powered 5-Finger Pneumatically Driven Hand Prosthesis Using Supination of Forearm." Journal of Robotics and Mechatronics 34, no. 2 (April 20, 2022): 454–65. http://dx.doi.org/10.20965/jrm.2022.p0454.
Full textAbstract:
Recently, myoelectric hand prostheses produced by the combination of 3D-CAD and printer have gained attention. 3D printing of hand prosthesis has resulted in cost reduction. However, when an electric actuator with reduction gears is used as the driving source of the hand prosthesis, the joint rigidity becomes high; therefore, compliance control is required to grasp soft target objects. In this study, we propose a pneumatically driven hand prosthesis using a flexible bellows actuator. The hand prosthesis is lightweight and inexpensive because it is self-powered and generates compressed air through the supination motion of the user’s forearm instead of an external compressor, which is essential for conventional pneumatic systems. Stable flexible grasping of the target object was achieved by driving a five-finger hand using this system.
30
Dunai, Larisa, Martin Novak, and Carmen García Espert. "Human Hand Anatomy-Based Prosthetic Hand." Sensors 21, no. 1 (December 28, 2020): 137. http://dx.doi.org/10.3390/s21010137.
Full textAbstract:
The present paper describes the development of a prosthetic hand based on human hand anatomy. The hand phalanges are printed with 3D printing with Polylactic Acid material. One of the main contributions is the investigation on the prosthetic hand joins; the proposed design enables one to create personalized joins that provide the prosthetic hand a high level of movement by increasing the degrees of freedom of the fingers. Moreover, the driven wire tendons show a progressive grasping movement, being the friction of the tendons with the phalanges very low. Another important point is the use of force sensitive resistors (FSR) for simulating the hand touch pressure. These are used for the grasping stop simulating touch pressure of the fingers. Surface Electromyogram (EMG) sensors allow the user to control the prosthetic hand-grasping start. Their use may provide the prosthetic hand the possibility of the classification of the hand movements. The practical results included in the paper prove the importance of the soft joins for the object manipulation and to get adapted to the object surface. Finally, the force sensitive sensors allow the prosthesis to actuate more naturally by adding conditions and classifications to the Electromyogram sensor.
31
Semasinghe, C. L., R. K. P. S. Ranaweera, J. L. B. Prasanna, H. M. Kandamby, D. G. K. Madusanka, and R. A. R. C. Gopura. "HyPro: A Multi-DoF Hybrid-Powered Transradial Robotic Prosthesis." Journal of Robotics 2018 (2018): 1–15. http://dx.doi.org/10.1155/2018/8491073.
Full textAbstract:
This paper proposes a multi-DoF hybrid-powered transradial robotic prosthesis, named HyPro. The HyPro consists of two prosthetic units: hand and wrist that can achieve five grasping patterns such as power grasp, tip grasp, lateral grasp, hook grasp, and index point. It is an underactuated device with 15 degrees of freedom. A hybrid powering concept is proposed and implemented on hand unit of HyPro where the key focus is on restoration of grasp functions of biological hand. A novel underactuated mechanism is introduced to achieve the required hand preshaping for a given grasping pattern using electric power in the pregrasp stage and body power is used in grasp stage to execute the final grasping action with the selected fingers. Unlike existing hybrid prostheses where each of the joints is separately controlled by either electric or body power, the proposed prosthesis is capable of delivering grasping power in combination. The wrist unit of HyPro is designed and developed to achieve flexion-extension and supination-pronation using electric power. Experiments were carried out to evaluate the functionality and performance of the proposed hybrid-powered robotic prosthesis. The results verified the potential of HyPro to perform intended grasping patterns effectively and efficiently.
32
O’Brien, Lisa, Elena Montesano, Alix Chadwell, Laurence Kenney, and Gerwin Smit. "Real-World Testing of the Self Grasping Hand, a Novel Adjustable Passive Prosthesis: A Single Group Pilot Study." Prosthesis 4, no. 1 (February 8, 2022): 48–59. http://dx.doi.org/10.3390/prosthesis4010006.
Full textAbstract:
(1) Background: This study investigated the feasibility of conducting a two-week “real-world” trial of the Self Grasping Hand (SGH), a novel 3D printed passive adjustable prosthesis for hand absence; (2) Methods: Single-group pilot study of nine adults with trans-radial limb absence; five used body-powered split-hooks, and four had passive cosmetic hands as their usual prosthesis. Data from activity monitors were used to measure wear time and bilateral activity. At the end of the two-week trial, function and satisfaction were measured using the Orthotics and Prosthetics Users’ Survey Function Scale (OPUS) and the prosthesis satisfaction sub-scales of the Trinity Amputations and Prosthesis Experience Scale (TAPES). Semi-structured interviews captured consumer feedback and suggestions for improvement; (3) Results: Average SGH wear time over 2 weeks was 17.5 h (10% of total prosthesis wear time) for split-hook users and 83.5 h (63% of total prosthesis wear time) for cosmetic hand users. Mean satisfaction was 5.2/10, and mean function score was 47.9/100; (4) Two-week real-world consumer testing of the SGH is feasible using the methods described. Future SGH designs need to be more robust with easier grasp lock/unlock.
33
Copeland, Christopher, Mukul Mukherjee, Yingying Wang, Kaitlin Fraser, and Jorge M. Zuniga. "Changes in Sensorimotor Cortical Activation in Children Using Prostheses and Prosthetic Simulators." Brain Sciences 11, no. 8 (July 27, 2021): 991. http://dx.doi.org/10.3390/brainsci11080991.
Full textAbstract:
This study aimed to examine the neural responses of children using prostheses and prosthetic simulators to better elucidate the emulation abilities of the simulators. We utilized functional near-infrared spectroscopy (fNIRS) to evaluate the neural response in five children with a congenital upper limb reduction (ULR) using a body-powered prosthesis to complete a 60 s gross motor dexterity task. The ULR group was matched with five typically developing children (TD) using their non-preferred hand and a prosthetic simulator on the same hand. The ULR group had lower activation within the primary motor cortex (M1) and supplementary motor area (SMA) compared to the TD group, but nonsignificant differences in the primary somatosensory area (S1). Compared to using their non-preferred hand, the TD group exhibited significantly higher action in S1 when using the simulator, but nonsignificant differences in M1 and SMA. The non-significant differences in S1 activation between groups and the increased activation evoked by the simulator’s use may suggest rapid changes in feedback prioritization during tool use. We suggest that prosthetic simulators may elicit increased reliance on proprioceptive and tactile feedback during motor tasks. This knowledge may help to develop future prosthesis rehabilitative training or the improvement of tool-based skills.
34
Omar, Abdalla M., and Mohamed Hassan. "Design of 3D printed smart material compatible hand prosthesis." MATEC Web of Conferences 318 (2020): 01039. http://dx.doi.org/10.1051/matecconf/202031801039.
Full textAbstract:
Every year there are about 3500-5200 people suffering from upper limb amputations, most of which are wrist disarticulation and transcarpal. This paper investigates current upper limb prostheses and presents the disadvantages of current prostheses, including limited degrees of freedom (DOF), limited range of motion, weight, customizability, and appearance. The proposed design is the first stage of a series of papers that proposes designs that are compatible with shape morphing materials. The use of these materials as actuators allows the development and design of more advanced upper limb prostheses. Therefore, the prosthesis is modelled as needed for patients with transcarpal/wrist disarticulation amputations. The proposed model has 27 degrees of freedom (DOF), reduced weight, low cost, improved appearance, and is printable to fit.
35
Fraser, C. M. "An evaluation of the use made of cosmetic and functional prostheses by unilateral upper limb amputees." Prosthetics and Orthotics International 22, no. 3 (December 1998): 216–23. http://dx.doi.org/10.3109/03093649809164486.
Full textAbstract:
There is currenty a distinction drawn between a prosthesis considered to be provided for purely cosmetic reasons and a functional prosthesis provided to enable the amputee to achieve basic hand function. Using video analysis the study reported in this paper demonstrates that for non-manipulative actions cosmetic prostheses are actively used in the performance of everyday tasks as frequently evidence for a cosmetic prosthesis to be presented to an amputee as a realistic initial prosthesis and not as the option of last resort if a functional prosthesis is rejected. It is also recommended that training is provided in the use of cosmetic prostheses in two-handed tasks.
36
Putzi, Robert. "Myoelectric Partial-Hand Prosthesis." JPO Journal of Prosthetics and Orthotics 4, no. 2 (1992): 103???108. http://dx.doi.org/10.1097/00008526-199200420-00005.
Full text
37
Putzi, Robert. "Myoelectric Partial-Hand Prosthesis." JPO Journal of Prosthetics and Orthotics 4, no. 2 (December 1992): 103???108. http://dx.doi.org/10.1097/00008526-199212000-00005.
Full text
38
Boshlyakov, Andrew A., and Alexander S. Ermakov. "Development of a Vision System for an Intelligent Robotic Hand Prosthesis Using Neural Network Technology." ITM Web of Conferences 35 (2020): 04006. http://dx.doi.org/10.1051/itmconf/20203504006.
Full textAbstract:
A brief review of the existing auxiliary prosthetic control systems was carried out. The concept of an intelligent prosthesis is proposed, which will expand the possibilities of application and simplify the use of the prosthesis. The required actions of the vision system in automatic and manual capture modes are considered. The sequence of operation of the subsystems of the technical vision system is determined. The possibility of implementing a prosthesis vision system based on neural network technology is shown. The method of using a ready-made neural network for recognition of objects by a prosthesis is considered. The possibilities of using the considered neural network technologies in the mathematical education of engineers are presented. A version of the prosthesis design is proposed. The possibility of constructing the described prosthesis is shown.
39
Cuellar, Juan Sebastian, Gerwin Smit, Amir A. Zadpoor, and Paul Breedveld. "Ten guidelines for the design of non-assembly mechanisms: The case of 3D-printed prosthetic hands." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 232, no. 9 (August 16, 2018): 962–71. http://dx.doi.org/10.1177/0954411918794734.
Full textAbstract:
In developing countries, prosthetic workshops are limited, difficult to reach, or even non-existent. Especially, fabrication of active, multi-articulated, and personalized hand prosthetic devices is often seen as a time-consuming and demanding process. An active prosthetic hand made through the fused deposition modelling technology and fully assembled right after the end of the 3D printing process will increase accessibility of prosthetic devices by reducing or bypassing the current manufacturing and post-processing steps. In this study, an approach for producing active hand prosthesis that could be fabricated fully assembled by fused deposition modelling technology is developed. By presenting a successful case of non-assembly 3D printing, this article defines a list of design considerations that should be followed in order to achieve fully functional non-assembly devices. Ten design considerations for additive manufacturing of non-assembly mechanisms have been proposed and a design case has been successfully addressed resulting in a fully functional prosthetic hand. The hand prosthesis can be 3D printed with an inexpensive fused deposition modelling machine and is capable of performing different types of grasping. The activation force required to start a pinch grasp, the energy required for closing, and the overall mass are significantly lower than body-powered commercial prosthetic hands. The results suggest that this non-assembly design may be a good alternative for amputees in developing countries.
40
PILLET, J., and A. DIDIERJEAN-PILLET. "Aesthetic Hand Prosthesis: Gadget or Therapy? Presentation of a New Classification." Journal of Hand Surgery 26, no. 6 (December 2001): 523–28. http://dx.doi.org/10.1054/jhsb.2001.0658.
Full textAbstract:
Aesthetic prostheses must fulfill a functional as well as an aesthetic role. The function of these prostheses may be perceived as an additional passive support, or as an instrument of social function and an aid to the patient. This functional role has been observed in the continued use of these prostheses over several years. We reviewed our experience with prescription, fitting and follow-up care in 2847 patients. Classification of these patients was based on their age, level of amputation (with or without functional pinch) and cause of amputation. Analysis of the data ratifies our indications for prosthesis fitting. The long-term wearing of these aesthetic prostheses confirms their use as therapeutic tools.
41
Askadinov, M. N., B. K. Kadyraliev, S. H. Lilotkhia, O. G. Musaev, and V. B. Arutyunyan. "Aortic valve leaflet replacement using autopericardium as an alternative approach of aortic valve stenosis treatment: literature review." Perm Medical Journal 37, no. 5 (January 7, 2021): 52–60. http://dx.doi.org/10.17816/pmj37552-60.
Full textAbstract:
Regarding degenerative defects of the aortic valve, the main method of treatment is dissection of malformed leaflets and placement of prosthetic valve. In most cases, mechanical and biological prostheses are used. Each type of prosthesis has shortcomings related to both the implantation technique and essential medication support to keep it functioning. Patients with implanted mechanical prosthesis need lifelong anticoagulation therapy and constant monitoring of blood coagulation rates, where on the one hand there is a risk of occurring thromboembolic complications, and on the other hand haemorrhagic complications. The peculiarity of biological prostheses is a high probability of degeneration and the need for re-operation, especially in young patients, therefore the implantation of such prostheses is mainly carried out in elderly patients. Despite continuous change and modification of artificial valves, the ideal aortic valve prosthesis does not exist today. Various attempts to replace aortic valve leaflets with artificial and biological materials have not succeeded or gained great recognition. In 2007, Shigeyuki Ozaki introduced a technique to replace the aortic valve leaflets with an autopericardium treated with 0.6 % glutar aldehyde solution. Inspite of the encouraging mid-term results, this surgery has not yet become widespread among cardiac surgeons due to the complicated operating technique and lack of long-term results. Considering the research of literature, experience of different cardiosurgical centers in this field as well as our own experience, there is a need to systematize the results of Ozaki procedure, among patients with aortic valve pathology, presented in the recent publications.
42
Askadinov, M. N., B. K. Kadyraliev, S. H. Lilotkhia, O. G. Musaev, and V. B. Arutyunyan. "Aortic valve leaflet replacement using autopericardium as an alternative approach of aortic valve stenosis treatment: literature review." Perm Medical Journal 37, no. 5 (January 7, 2021): 52–60. http://dx.doi.org/10.17816/pmj37552-60.
Full textAbstract:
Regarding degenerative defects of the aortic valve, the main method of treatment is dissection of malformed leaflets and placement of prosthetic valve. In most cases, mechanical and biological prostheses are used. Each type of prosthesis has shortcomings related to both the implantation technique and essential medication support to keep it functioning. Patients with implanted mechanical prosthesis need lifelong anticoagulation therapy and constant monitoring of blood coagulation rates, where on the one hand there is a risk of occurring thromboembolic complications, and on the other hand haemorrhagic complications. The peculiarity of biological prostheses is a high probability of degeneration and the need for re-operation, especially in young patients, therefore the implantation of such prostheses is mainly carried out in elderly patients. Despite continuous change and modification of artificial valves, the ideal aortic valve prosthesis does not exist today. Various attempts to replace aortic valve leaflets with artificial and biological materials have not succeeded or gained great recognition. In 2007, Shigeyuki Ozaki introduced a technique to replace the aortic valve leaflets with an autopericardium treated with 0.6 % glutar aldehyde solution. Inspite of the encouraging mid-term results, this surgery has not yet become widespread among cardiac surgeons due to the complicated operating technique and lack of long-term results. Considering the research of literature, experience of different cardiosurgical centers in this field as well as our own experience, there is a need to systematize the results of Ozaki procedure, among patients with aortic valve pathology, presented in the recent publications.
43
Vaz, Anand, and Shinichi Hirai. "A Bond Graph Approach to the Analysis of Prosthesis for a Partially Impaired Hand." Journal of Dynamic Systems, Measurement, and Control 129, no. 1 (March 7, 2006): 105–13. http://dx.doi.org/10.1115/1.2397160.
Full textAbstract:
A system dynamics approach, based on bond graphs, is presented for the analysis of prosthetic devices for a partially impaired hand. The partial impairment implies that the hand has lost one or more fingers but retains the ability of its remaining natural fingers. It is shown that the existing natural joints can be used for the actuation of prosthetic finger joints and enable performance of tasks that would not have been possible otherwise. This is a challenging task as motion has to be transmitted from the remaining natural joints to the prosthetic joints. The joint axes move with respect to each other during performance of tasks and do not have any fixed relative orientation. In this work, basic concepts for the actuation of the prosthesis required for such tasks are developed systematically. Based on these concepts, Bowden cable based joint actuation mechanisms for transmission of motion from natural joints to corresponding prosthetic joints are presented and analyzed. The analysis of dynamics of the resulting under-actuated prosthesis with joint actuation mechanism is based on bond graph models that are systematically developed. Using these models, system equations are derived and numerical simulations performed for the analysis. One- and two-joint actuated prototypes of the prosthesis have been presented and effectively demonstrate the proposed concepts.
44
Wanamaker, Andrea B., Lynsay R. Whelan, Jeremy Farley, and Ajit MW Chaudhari. "Biomechanical analysis of users of multi-articulating externally powered prostheses with and without their device." Prosthetics and Orthotics International 43, no. 6 (August 30, 2019): 618–28. http://dx.doi.org/10.1177/0309364619871185.
Full textAbstract:
Background: Loss of the hand results in significant functional deficits and requires adaptation of movement patterns which may result in overuse injuries. An externally powered prosthesis may improve function of the affected limb and reduce the overreliance on the intact side; however, little research has been done in this area. Objective: Investigate changes in upper limb function and kinematics in individuals with partial-hand amputations performing a functional assessment by comparing results with and without a multi-articulating hand prosthesis. Study design: Cross-sectional. Methods: Three-dimensional kinematics of four- and five-digit limb loss participants were collected as they performed the Southampton Hand Assessment Procedure with and without a prothesis. Results: Ten males completed the protocol: five with four-digit loss (thumb intact) and five with five-digit loss. Significantly larger joint motions were seen without the prosthesis than with for all participants, which may be an indicator of higher risk for overuse injury. Significant improvement was seen in Southampton Hand Assessment Procedure scores in the five-digit limb loss participants using the prosthesis compared with not using the device ( p < 0.05 for 6/7 Southampton Hand Assessment Procedure score categories). Conclusion: The prosthesis reduced functional deficits and decreased joint range of motion in individuals with partial hand loss. Results showed reduced compensatory motions throughout the upper limb and torso which may reduce the risk of overuse injury. Clinical relevance Results of this study indicate that externally powered partial hand prostheses can be effective in improving function and reducing compensation in individuals with partial hand loss.
45
Peerdeman, Bart, Stefano Stramigioli, Edsko E. G. Hekman, Dannis M. Brouwer, and Sarthak Misra. "Development of Underactuated Prosthetic Fingers with Joint Locking and Electromyographic Control." Mechanical Engineering Research 3, no. 1 (April 24, 2013): 130. http://dx.doi.org/10.5539/mer.v3n1p130.
Full textAbstract:
Modern hand prostheses possess a large number of degrees of freedom. These degrees of freedom cannot simply be actuated by a single motor each, since their combined size and weight would exceed the limitations of an anthropomorphic prosthesis. Some hand prostheses try to remedy this by way of underactuation of the fingers or addition of entirely passive fingers, but this reduces the hand's ability to execute different grasp types. We present a joint locking system, allowing certain degrees of freedom to be fixed during actuation of an underactuated finger. These locks are actuated by miniature solenoids, and allow the fingers to support a variety of grasp types. In this paper, these locks are implemented in a two-fingered prosthesis prototype, which is able to perform several grasping motions important for prosthesis users. This prototype is controlled by pre-recorded electromyographic signals, which control different grasp types and their opening/closing. Various grasping experiments show that the prototype is able to execute three essential grasp types for daily living with a single main actuator, and can be intuitively controlled by means of six different electromyographic signals. This prototype demonstrates new joint locking mechanisms and control systems that can provide an anthropomorphic, myoelectric hand prosthesis with minimal actuation and intuitive control.
46
Head, John S., David Howard, Stephen W. Hutchins, Laurence Kenney, Glyn Harvey Heath, and Andrey Yurievitch Aksenov. "The use of an adjustable electrode housing unit to compare electrode alignment and contact variation with myoelectric prosthesis functionality: A pilot study." Prosthetics and Orthotics International 40, no. 1 (August 18, 2014): 123–28. http://dx.doi.org/10.1177/0309364614545417.
Full textAbstract:
Background:Usable myoelectric control relies on secure and intimate contact at all times between the electrode, the socket and the residual limb. At present, there is little post-fitting socket adjustment available to prosthetists with respect to electrode contact security or alignment. Failure to provide secure electrode contact could result in the development of motion artefacts, poor prehensor response and subsequent prosthesis non-usage.Objectives:To establish the effect of alteration to electrode contract security and alignment on prosthesis functionality using a bespoke electrode housing unit.Study design:This study investigated the effect of electrode contact security and alignment on upper limb myoelectric prosthesis functionality.Methods:Four different electrode housing arrangements were assessed within prosthetic sockets fitted to six transradial prosthesis subjects using the Southampton Hand Assessment Procedure, which is a reliable and validated prosthesis functionality assessment tool.Results:Significantly higher functionality scores were achieved with the bespoke housing unit compared to when using conventional electrode housings.Conclusion:Myoelectric prosthesis functionality is closely linked to electrode contact security and to electrode alignment with respect to the residual limb. Both of these factors can be improved locally using an adjustable electrode housing unit.Clinical relevanceProvision of an electrode housing system that enables adjustments to be made to electrode orientation can improve prosthesis functionality, particularly in cases where tight-fitting sockets are not possible, and/or where the prosthetist may be inexperienced with regard to myoelectric prosthesis fitting.
47
Leow, Eng-Lye, Anam-Kueh Kour, Barry P. Pereira, and Robert W. H. Pho. "COLOUR-MATCHING IN HAND AND FINGER PROSTHESES: THE ASIAN PERSPECTIVE." Hand Surgery 01, no. 01 (January 1996): 37–43. http://dx.doi.org/10.1142/s0218810496000099.
Full textAbstract:
The wide range of skin tones in the Asian population presents a challenge when colour-matching hand and finger prostheses. It requires that the prostheses be custom-made to better match the wide variations. We have developed a finger and hand prosthesis using a multi-layered moulding technique incorporating a colour-matching procedure capable of reproducing the colour tones and life-like appearance of the skin. Between 1990–1994, we have fitted these prostheses to a total of 109 patients. In evaluating the colour-match of their prostheses, 84% of the patients fitted with hand prostheses and 78% of those fitted with finger prostheses had a good to excellent match. This paper discusses some of the challenges we face in colour-matching hand and finger prostheses in the Asian population.
48
Gonzalez-Perez-Somarriba, B., G. Centeno, C. Vallellano, and L. M. Gonzalez-Perez. "On the Analysis of the Contact Conditions in Temporomandibular Joint Prostheses." Advances in Materials Science and Engineering 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/2687864.
Full textAbstract:
Temporomandibular joint replacement (TMJR) is a complex surgical procedure in which the artificial joints available must assure the anatomical reconstruction and guarantee a good range of the natural temporomandibular joint (TMJ) movements. With this aim, different types of TMJ prostheses, including the stock prosthetic system and custom-made prostheses, are being currently implanted. Although temporomandibular joint replacements (TMJRs) are expected to accomplish their function during a number of years, they might actually fail and need to be replaced. This paper analyzes different design factors affecting the contact stress distributions within the TMJ prosthesis interface, which are consequently involved in their deterioration and final failure of the prosthetic device. With this purpose, a numerical model based on finite elements has been carried out in order to evaluate the stress states attained in different prosthesis configurations corresponding to general types of TMJ prostheses. On the other hand, the actual degradation of resected implants has been evaluated via optical microscopy. The linkage between the numerical simulations performed and experimental evidence allowed the authors to establish the different wear and damage mechanisms involved in the failure of stock TMJ prostheses. Indeed, the results obtained show that the contact stresses at the interface between the mandible and the glenoid fossa components play a key role in the failure process of the TMJR devices.
49
Jönsson, Stewe, Kerstin Caine-Winterberger, and Rickard Brånemark. "Osseointegration amputation prostheses on the upper limbs: methods, prosthetics and rehabilitation." Prosthetics and Orthotics International 35, no. 2 (June 2011): 190–200. http://dx.doi.org/10.1177/0309364611409003.
Full textAbstract:
Background: The osseointegration programme for upper extremity amputation started in Sweden in 1990, when a titanium fixture was first implanted into a thumb. This method has since been used for transhumeral and below-elbow amputation. The treatment involves two surgical procedures. During the first a titanium fixture is surgically attached to the skeleton, and a second procedure six months later involves a skin penetrating abutment to which the prosthesis is attached.Objectives: To describe the osseointegration procedure for surgery, prosthetics and rehabilitation.Methods: Patients with short stumps and previous problems with prosthetic fitting were selected. From 1990 to April 2010, 37 upper limb cases were treated and fitted with prosthesis: 10 thumbs, 1 partial hand, 10 transradial and 16 transhumeral amputations. Of these, 7 patients are currently not prosthetic users.Results: Patients indicated that function and quality of life had improved since osseointegration.Conclusion: Osseointegration is an important platform for present and future prosthetic technology. The prosthetic situation is improved due to the stable fixation, freedom of motion and functionality.Clinical relevance The two-stage osseointegration procedure has the potential to change the rehabilitation strategy for selected upper limb amputees. The method eliminates the need for a socket and the prosthesis will always fit. The stable prosthetic fixation and increased freedom of motion generates improved function. Specially designed components and rehabilitation procedures have been developed.
50
Yang, Jingzhou, Esteban Peña Pitarch, Karim Abdel-Malek, Amos Patrick, and Lars Lindkvist. "A multi-fingered hand prosthesis." Mechanism and Machine Theory 39, no. 6 (June 2004): 555–81. http://dx.doi.org/10.1016/j.mechmachtheory.2004.01.002.
Full text