Fig 1.
Donning of myoelectric gel liner system.
(a) Gel liner system is inverted and then rolled onto the residual limb (A blue oval highlights the electrode domes and the connected fabric leads); (b) Donned liner with proximal magnetic connector at distal end, shown prior to donning myoelectric prosthesis (A yellow oval indicates the proximal connector); (c) Donning of prosthesis with distal magnetic connector embedded at the distal end of the socket. Locking of proximal and distal magnetic connector parts aided by magnetic attraction and secured with cam latch; (d) Securing of myoelectric prosthesis with auxiliary suspension harness.
Fig 2.
(a) Internal view of liner showing central routing of fabric leads; (b) External view of liner in which each fabric lead is electrically connected to hollow electrical pins, and showing the central threaded bolt that the proximal magnetic connector part is secured onto.
Fig 3.
Magnetic electrical connector.
(a) Exploded-view drawing of proximal magnetic connector part from [11]; (b) Proximal magnetic connector which is secured to outside of liner; (c) Distal magnetic connector which is secured within distal end of socket; (d) Complete system with proximal connector attached to gel liner and distal connector attached to socket.
Table 1.
Subject demographics.
Fig 4.
Electrical resistance of gel liner system before (blue) and after (red) home trials for all eight subjects.
Note that values under 200 Ω pre-amplification threshold yield useful signal-to-noise ratios for consistent myolectric control.
Fig 5.
Self-reported socket comfort scores (0–10 range) for the subjects' home sockets and the liner system.
Higher scores indicate greater perceived comfort. * Indicates statistical significance (p = 0.02).
Fig 6.
Experience with myoelectric gel liner system.
Divergent stacked bar chart structured such that counts to the right indicate a favorable response to the questions within the four clinical areas: ease of use, comfort, suspension, and function. Note: Question 12 and subjects’ responses are included separately in the Results section, as the Likert scale was not used.
Fig 7.
Comparison of myoelectric gel liner system to own system.
Divergent stacked bar chart structured such that counts to the right indicate a favorable response to the questions within the four clinical areas: ease of use, comfort, suspension, and function.