Page 219 - Handbook of Biomechatronics

Fig. 19 Upper-limb Osseointegration prosthesis architecture (OHMG). (A) In the con-
ventional socket suspension for high amputations, the adjacent joint is frequently con-
strained in the range of motion by the socket to provide sufficient suspension. The
OHMG eliminates socket-related issues and allows for unrestricted limb motion (see
movie S1 downloadable from Ortiz-Catalan et al., 2014a). (B) The prosthetic limb was
attached to the abutment, which transferred the load to the bone via the
osseointegrated fixture. The abutment screw, which goes through the abutment to
the fixture, was designed to maintain the abutment in place. A parallel connector (1)
was embedded in the screw’s distal end to electrically interface the artificial limb. This
connector was electrically linked to a second feedthrough connector (2) embedded in
the screw’s proximal end. The stack connector (2) interfaced with a pin connector exten-
ding from the central sealing component (3), from which leads extended intramedullary
and then transcortically to a final connector (4) located in the soft tissue. The leads from
the neuromuscular electrodes (“e.”) were mated to connector (4). (C) Placement of
epimysial and cuff electrodes in the right upper arm. (From Ortiz-Catalan, M.,
Hakansson, B., Branemark, R. 2014. An osseointegrated human-machine gateway for
long-term sensory feedback and motor control of artificial limbs. Sci. Transl. Med. 6(257),
257re256. https://doi.org/10.1126/scitranslmed.3008933; in order to provide all the details
of proposed OHMG platform.)