Vibrotactile feedback in forearm prostheses in daily life grasping tasks

Completed

Conditions: amputatie van de onderarm
10027664
amputation
upper limb loss

Registration Number: NL-OMON38759

Lead Sponsor: niversiteit Twente

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Completed

Sex: Not specified

Target Recruitment: 20

Inclusion Criteria

age between 18 and 65
able to control the measurement setup
forearm circumference between 24 and 28 cm (healthy subjects)
forearm stump of at least 8 cm (patients)
myolectric prosthesis user (patients)

Exclusion Criteria

extreme skin problems at the forearm
mental problems (when they cannot understand the procedures)
self-reported diminished sense of touch (healthy subjects)
experience with vibrotactile stimulation (healthy subjects)
experience with EMG control of a prosthesis or other device (healthy subjects )
hypersensitivity of the skin of the stump (patients)

Study & Design

Study Type: Interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
<p>The main outcome parameter of this study is the performance in grasping tasks.<br /><br>Performance will be expressed by: (1) the time needed by the subjects to<br /><br>perform the grasping task, (2) the success in grasping (percentage of objects<br /><br>that is handled without object slippage or breakage), and (3) the Index of<br /><br>Functionality (IoF), which is the outcome parameter of the SHAP test, which is<br /><br>part of the test protocol.</p><br>

Secondary Outcome Measures

Name	Time	Method
<p>The secondary outcome parameters will provide information about the performance<br /><br>of the separate feedback methods (hand opening en grasping force feedback). To<br /><br>evaluate the effect of hand opening feedback, the performance in situations<br /><br>with and without visual feedback will be compared (primary study parameters).<br /><br>The effect of grasping force feedback will be determined by the the number of<br /><br>trials needed by the subjects to succesfully perform the grasping task and the<br /><br>excess of grasping force that is applied to hold the objects. The combination<br /><br>of hand opening and grasping force feedback likely also provides information<br /><br>about the stiffness of an object. This effect will be evaluated with the<br /><br>percentage objects that is correctly identified (size, weigth and stiffness) by<br /><br>the subjects.</p><br>