Development of a Novel Device to Measure Socket Pistoning

 描述(由申请人提供)： 项目摘要/摘要插座活塞，定义为假肢插座内残肢的轴向运动，会导致退伍军人截肢后的不适和皮肤损伤，如水泡、皮肤破裂和老茧。以前的大多数研究都是静态地评估活塞，但这并不代表活塞发生在日常生活中遇到的典型活动中。之前的两项研究已经对活塞进行了动态评估，但需要昂贵的设备和插座修改。开发一种不需要改装插座并可以准确动态测量插座活塞的廉价工具，可以提高插座舒适性，适合截肢退伍军人，使他们重新获得尽可能大的功能能力和活动水平。目的 该项目的目的是设计、开发、验证和临床实施一种新的测量装置，该装置价格低廉，不需要修改插座，并准确和定量地测量退伍军人经胫骨和经股骨截肢后的插座活塞。利用非接触式电位器和无线收发器等技术，已经开发出一种准确、便携和廉价的样机。这项工作的第一个目标是进一步设计和开发这种动态插座活塞测量装置，使其能够在临床环境中使用。五个设备和一个用户界面将被组装和校准。这些设备将小巧(7cmx4cmx3 Cm)，价格便宜(售价500美元)，便携(电池供电和无线)，不需要修改插座。第二个目的是验证插座活塞测量装置的有效性。为了评估动态插座活塞，将同时从插座活塞测量设备、动态立体摄影系统和VICON运动捕获系统收集数据，同时在定制的插座内以1-2赫兹的频率上下移动拟人的代表肢体，这是一种典型的行走轴向运动。当插座活塞测量装置的测量结果与动态立体摄影和VICON系统的测量结果相差小于2 mm，并且在5分钟内信号漂移小于1%时，该装置将在临床上实施。最终目标是在弗吉尼亚州东科罗拉多州医疗保健系统Jewell地区截肢诊所的退伍军人身上临床实施插座活塞测量装置，以实际评估系统设计和功能。三名假肢医生将在为20名接受经胫骨或经股截肢的退伍军人定期预约期间实施插座活塞测量装置。患者和修复师都将评估该设备的易用性、舒适性和适用性。在临床环境中对套筒活塞进行准确的动态量化将为套筒的舒适性和适合性提供客观的测量，从而为修复师和研究人员提供有益的信息，从而改进套筒的制造技术和评价套筒的舒适性。正确安装插座和减少插座活塞有可能减少残留的肢体皮肤问题，使行走更舒适，并鼓励腿部截肢的退伍军人更积极的生活方式。

 DESCRIPTION (provided by applicant): Project Summary/Abstract Socket pistoning, defined as the axial movement of the residual limb within a prosthetic socket, leads to discomfort and skin damage such as blisters, skin breakdown, and callouses in Veterans with an amputation. Most previous research has assessed pistoning statically, but this does not represent the pistoning that takes place during typical activities encountered in daily life. Two previous studies have assessed pistoning dynamically, but required expensive equipment and socket modification. Developing an inexpensive tool that does not require socket modification and can accurately measure socket pistoning dynamically could improve socket comfort and fit for Veterans with amputations, allowing them to regain the greatest possible level of functional ability and activity. The purpose of the proposed project is to design, develop, validate, and clinically implement a novel measurement device that is inexpensive, requires no socket modification, and accurately and quantitatively measures socket pistoning in Veterans with transtibial and transfemoral amputations. Using technology such as non-contact potentiometers and wireless transceivers, an accurate, portable, and inexpensive prototype has been developed. The first aim of the proposed work is to further design and develop this dynamic socket pistoning measurement device so that it can be used in a clinical setting. Five devices and a user interface will be assembled and calibrated. The devices will be small (7cm x 4cm x 3cm), inexpensive (cost <$500), portable (battery-powered and wireless), and require no socket modification. The second aim is to validate the socket pistoning measurement device. To assess dynamic socket pistoning, data will be collected simultaneously from the socket pistoning measurement device, dynamic stereo radiography system, and Vicon motion capture system, while an anthropomorphic representative limb is moved up and down at 1-2 Hz within a 40 mm range inside a custom-fabricated socket, an axial movement typical for walking. When the socket pistoning measurement device results are less than 2 mm different from the dynamic stereo radiography and Vicon systems, and have a signal drift of less than 1% over five minutes, the device will be implemented in the clinic. The final aim is to clinically implement the socket pistoning measurement device on Veterans with an amputation at the VA Eastern Colorado Health Care System Jewell Regional Amputation Clinic to practically assess system design and function. Three prosthetists will implement the socket pistoning measurement device during their regularly scheduled appointments on 20 Veterans with transtibial or transfemoral amputations. Both the patients and prosthetists will evaluate the device for ease of use, comfort and applicability. The accurate quantification of socket pistoning dynamically and in a clinical setting will provide an objective measure of socket comfort and fit; thus giving beneficial information to prosthetists and researchers that could improve socket fabrication techniques and assessment of socket comfort. Properly fitting sockets and the reduction of socket pistoning have the potential to reduce residual limb skin problems, make ambulation more comfortable, and encourage a more active lifestyle among Veterans with a leg amputation.