Intended Use
Heavy Duty Outside Locking Hinges are used to replace the
natural elbow joint for patients with elbow disarticulations and
long transhumeral amputations. The joints lock and unlock by
cable pull, which allows the carrying of objects and activation
of the terminal device. Each pair includes one locking and one
non-locking hinge. The locking joint hinge has five individual
locking positions throughout the flexion range. This joint is
intended for heavy-duty use and will support higher loads than
standard joint sets.
Performance Characteristics
Part Number
53883 / 50950
Locking Positions
5
Housing Length to
Joint Center
2.03 in. (51.6 mm)
Housing Width
1.406 in. (35.7 mm)
Thickness
0.37 in. (9.4 mm)
Weight
15.5 oz. (434 g)
Primary Materials
Stainless Steel, Tool Steel,
and Aluminum
The device is intended for single user/patient use only.
Storage and Handling
It is recommended that prosthetic hinges be stored in a cool,
clean, dry environment away from harsh chemicals (chlorine,
acids, acetone, etc.).
Warnings and Precautions
CAUTION: Lubricate moving parts with only
Lubriplate® 630-AA or equivalent.
CAUTION: Prolonged exposure to liquids will
result in corrosion and failure of the device.
CAUTION: Body-powered devices should not rely
on cable tension for grasp control if the user has
been cleared to drive with the prosthesis.
NOTICE: Abnormal or improper environmental
conditions will lead to malfunctioning and damage
of this device and are not covered under the
warranty. This prosthetic component must not
be subjected to dust/debris, harsh chemicals,
liquids, abrasives, vibration, activities which would
damage the biological limb, or prolonged extreme
temperatures (< -5 °C or > 50 °C).
NOTICE: The ability of an upper limb prosthetic
device user to drive should be determined on a
case-by-case basis by a specialist. Contact your
local governing authorities regarding any driving
restrictions or limitations. Body-powered devices
should not rely on cable tension for grasp control
if the user has been cleared to drive with the
prosthesis.
Qualified Provider
Attachment, adjustment, alignment, and delivery of
this device must be performed by or under the direct
supervision of a qualified prosthetist. Unless stated in
this manual, any such activities should not be attempted
by the user and will potentially void the device warranty.
Specifications and
Preparations Before Use
(Risk Management for
Installation and Calibration)
Alignment
The hinges are most easily aligned in a test fitting by
temporarily attaching a single hinge (typically the locking
hinge) to the socket and the temporary forearm. With
a single hinge in place, the forearm portion of the
prosthesis may be aligned by bending the proximal
and distal straps to achieve proper hanging angle both
in full extension and as the forearm is flexed toward
the midline. During fabrication, the alignment of the
single joint may be translated to the opposite side joint
using the Elbow Hinge Spacer Kit (PN 50188). For final
lamination, the anchor straps should be bent over
the end of the socket for strength and maintaining
alignment, or they may be removed if not needed.
Heavy Duty Outside Locking Hinges
Product Manual
