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This study centers around the imaging of internal structures of residual limb by means of modern radiographic imaging techniques (Dynamic Radiography-DRSA).
The purpose of our research is to further study the behavior of bones and soft tissue of the socket-stump interface during dynamic tasks such as walking or brisk walking. In the long term this research could prove a basis for improvements in the general design of sockets for the new generation of prosthetic devices.
There is very little known about the dynamic conditions inside a prosthetic socket, despite several research efforts based on pressure sensors, static X-ray images and/or computer simulations (FEM). The man reason is the inability of current measuring devices to track with enough resolution the in-vivo high speed kinematics of the stump-socket interface. Socket manufacturing and rectification in the field still relies on the experience and skill of the technician and feedback from the patient. This results in considerable dissatisfaction among the users and poor quantification of the socket fitting problems.
For lower extremity amputees, a well-fitting socket is an important element for a successful rehabilitation. The socket provides the interface between the prosthesis and residual limb, which is designed to provide comfort, appropriate load transmission, and efficient movement control. Attaining these objectives is extremely challenging, with up to 55% of lower limb amputees reporting dissatisfaction with socket comfort, residual limb pain, and/or skin breakdown. In addition, current techniques used to produce sockets with suitable characteristics are labor and cost intensive, and depend on the work of skilled prosthetists that are relatively scarce compared to the number of amputees. Currently, there are more than 500,000 lower limb amputees in the U.S. alone, with 60,000 new ones every year. For upper extremity amputees the issues related to the efficiency of movement, load transmission and comfort become even more challenging due to the different nature of the associated motor skills and performing tasks. Similarly there are l7,350 annual upper limb amputations distal to elbow in individuals under 21 years of age in the US. In most developed countries there are 1.55 amputees per 1000 people. Most amputees wear a prosthesis for about 70 hr/week and use crutches or wheelchairs as alternative assistive devices when performing certain tasks. Current solutions do not meet the patient specific needs.
It is suggested that our findings can further the understanding of the effects of slippage or harmful relative motion between stump and socket. Eventually new - and scientific based - guidelines for the fitting of artificial limbs could be recommended.
Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science
adaptive prosthetic socket
UWM Move Lab
Active, not recruiting
University of Wisconsin, Milwaukee
Published on BioPortfolio: 2014-07-23T21:09:28-0400
People who have had a leg amputated often choose to use a prosthetic (artificial) leg. This study will evaluate a new method of making prosthetic legs for people who have had an amputatio...
The purpose of this study is to evaluate a new prosthetic socket construction technique in order to improve the quality of care to lower extremity amputees.
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Alignment affects gait of individuals with transtibial prostheses. Sagittal and coronal alignment changes of the transtibial prostheses were demonstrated to affect socket reaction moments. However, th...
Individuals with trans-tibial amputation show a greater peak prosthetic ankle power (push- off) when using energy storing and returning (ESAR) prosthetic feet as compared to solid-ankle cushion-heel f...
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The part of a limb or tail following amputation that is proximal to the amputated section.
A condition sometimes occurring after tooth extraction, particularly after traumatic extraction, resulting in a dry appearance of the exposed bone in the socket, due to disintegration or loss of the blood clot. It is basically a focal osteomyelitis without suppuration and is accompanied by severe pain (alveolalgia) and foul odor. (Dorland, 28th ed)
Amputation of a lower limb through the sacroiliac joint.
Amputation or separation at a joint. (Dorland, 28th ed)
The removal of a limb or other appendage or outgrowth of the body. (Dorland, 28th ed)
Arthroplasty Joint Disorders Orthopedics Spinal Cord Disorders Orthopedics is the science or practice of correcting deformities caused by disease or damage to the bones and joints of the skeleton. This specialized branch of surgery may ...
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...