Use of Subtle Vibration to Improve Walking Ability by Lower Limb Amputees

Amputation Clinical Trial

Official title: Mechanically-induced Stochastic Resonance to Improve Amputee Gait

Status Completed

Clinical Trial Summary

The purpose of this study is to determine if subthreshold vibration, when applied to the residual limb of a lower limb amputee through their prosthetic socket, can sufficiently enhance peripheral sensation to result in an improved ability to balance and walk.

Clinical Trial Description

One of the many complications of diabetes is the loss of sensation in the feet. This sensory deficit can negatively impact the postural stability and mobility of non-amputees, since without feedback, it is simply more difficult to stand and walk. For lower limb amputees, the problem is compounded. These patients often have difficulty with prosthetic limb placement during maneuvering tasks, exhibit dramatic increases in the movement of their center of pressure during quiet standing, and both clinical and observational gait analysis reveal significant changes in their gait pattern relative to non-amputees.

The investigators' work proposes to explore the use of a novel prosthetic intervention for diabetic lower limb amputees. The investigators hypothesize that the intervention will sufficiently enhance proprioception to result in measurably improved postural stability and locomotor function for these patients. The intervention is based on a phenomenon known as stochastic resonance, whereby the application of sub-threshold vibration enables mechano-receptors previously unable to respond to stimuli to become more susceptible to depolarization. For Veterans with neuropathic proprioceptive losses, stochastic resonance may facilitate a functional response from subtle stimuli where gross inputs were formerly required. ;

Related Conditions & MeSH terms

• Amputation
• Diabetes Complications

• NCT number: NCT00985881
• Study type: Interventional
• Source: VA Office of Research and Development
• Status: Completed
• Phase: N/A
• Start date: April 1, 2007
• Completion date: June 25, 2018