The aim of this study is to find cable operation forces and displacements which can be perceived and controlled best by a prosthetic user.
Source
Brief title
Condition
- Other condition
Synonym
Health condition
armdefecten
Research involving
Sponsors and support
Intervention
No registrations found.
Outcome measures
Primary outcome
Constant Error: The differences between the reference force/displacement and
the reproduced force/displacement of the subject indicates the capability of a
subject to perceive and control the required forces/displacements.
Variability: the standard deviation of the reproduced force/displacement
indicates the capability of the subject to control the required
force/displacement.
Secondary outcome
Maximum force: The maximum force indicates the physical capacities of a
subject. We will investigate whether the physical capacities influence the
results of the primary study parameters (constant error and variability).
The subjects are requested to fill in NASA TLX questionnaires and a body map
(paper version). We want to monitor and document the subjective feelings of the
subject during the experiments and relate this to the found objective data.
Background summary
Nowadays 20 - 40 % of the arm amputees decide not to wear a prosthesis. Of
those who wear a prosthesis 40 -60% decide not to wear the full functionality
the prosthesis offers (Plettenburg, 2006). Users of a shoulder controlled body
powered prosthesis complain about the shoulder harness cutting into the arm pit
and tiresome use of the prosthesis (Biddiss, 2007). Recent research of Smit and
Plettenburg (2010 and 2012) showed that the operating forces of commercially
available prostheses are (too) high. Therefore the operation forces need to be
lowered. Operation forces getting too low might result in a loss of perception
and of control. This research will investigate which operating forces can be
perceived and controlled best by the users. Additionally the influence of
different cable displacements on the best operating force will be investigated.
Furthermore, the maximum operating forces will be measured to indicate whether
the physical capacities will influence the preference of operating forces. The
results of this study will be used as requirements for a new physiological
prosthesis control system which will be designed to match the capacities of the
user to the demands a prosthesis requires for ADL.
Study objective
The aim of this study is to find cable operation forces and displacements which
can be perceived and controlled best by a prosthetic user.
Study design
Cohort analytic study
Intervention
not applicable
Study burden and risks
The experiment illustrates the use of a prosthesis over 2 hours which is a
small part of the day. The duration of the experiment includes explanation time
and breaks. The subject can decide when he/she needs a break and can decide to
drop out of the experiment if it seems to be too tiresome.
Furthermore, during the perception experiments the requested forces are always
lower than the requested forces during the usage of a commercially available
prosthesis.
During the maximum force experiments the user is requested to deliver the
maximum force during 3 seconds.
Therefore the burden and risks of these experiments are negligible.
Mekelweg 2
Delft 2628CD
NL
Mekelweg 2
Delft 2628CD
NL
Listed location countries
Age
Inclusion criteria
- below elbow defect
- older than 18 years
Exclusion criteria
- older than 18 years
- mentally incompetent
- Neurological problems concerning upper extremity or torso
- Motor problems concerning upper extremity or torso
Design
Recruitment
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
Register | ID |
---|---|
CCMO | NL41112.042.12 |