Abstract This investigation seeks to understand how the interfaces between fracture orthoses and the body affect the relative motion between the user and device. Excessive relative motion can inadvertantly load the fracture and prevent healing. Identifying interfaces that minimize relative motion will inform the designs of future fracture orthoses. Three types of interfaces were tested: a thigh corset, a sling that loaded the ischium, and a sling that loaded the patellar tendon. Eighteen able-bodied participants were fitted with an adjustable Interface Testing System (ITS) that redirected loads away from the foot and lower leg to more proximal parts of the body using different combinations of the three interfaces. A video motion capture system measured the relative motion between the ITS and the participants while varying the type of interface, load through the ITS, and tightness of the thigh corset. Average relative motion varied from 1.6-6.5 cm across all conditions. The thigh corset combined with either the ischial sling or patellar tendon-bearing sling allowed the least relative motion of the interface conditions tested. However, the combinations differ in the sagittal profile they create for the user as well as the breadth of injuries they can treat. All of these factors need to be considered in the design of future fracture orthoses.

Brett Johnson

Sarah Pesquera

Joshua Childress

Jacqueline-Rae Villanueva

Stefanie M Shiels

W. Lee Childers

Journal of Medical Devices

The Journal of Medical Devices presents papers on medical devices that improve diagnostic, interventional and therapeutic treatments focusing on applied research and the development of new medical devices or instrumentation. It provides special coverage of novel devices that allow new surgical strategies, new methods of drug delivery, or possible reductions in the complexity, cost, or adverse results of health care. The Design Innovation category features papers focusing on novel devices, including papers with limited clinical or engineering results. The Medical Device News section provides coverage of advances, trends, and events.

The Journal of Medical Devices, Transactions of the ASME publishes papers on medical devices that enhance diagnostic, interventional, and therapeutic treatments, with a focus on applied research and the development of new medical devices or instrumentation. The journal provides special coverage of innovative devices that enable new surgical strategies, novel drug delivery methods, or potential reductions in the complexity, cost, or adverse outcomes of healthcare. The Design Innovation category features papers that focus on novel devices, including those with limited clinical or engineering results. The Medical Device News section covers advancements, trends, and events in the field.

《Journal of Medical Devices, Transactions of the ASME》期刊发表关于医疗设备的论文，这些设备旨在改善诊断、介入和治疗方法，重点关注应用研究以及新医疗设备或仪器的开发。期刊特别关注那些能够引入新外科策略、新药物递送方法，或可能降低医疗复杂性、成本和不良结果的新型设备。设计创新类别专注于新颖设备的论文，包括那些临床或工程结果有限的研究。医疗设备新闻部分则报道相关的进展、趋势和事件。

Category	Quartile
医学	4
医学, 工程生物医学	4

Measuring Relative Motion to Develop an Interface that Off-loads the Lower Limb

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Journal Info

Category	Quartile
ENGINEERING, BIOMEDICAL	4