medi M.4s OA Mode D'emploi page 5

M.4 s OA
®
Intended purpose
The M.4s OA is a brace with a frame for
relieving load on and supporting the
knee joint.
Indications
All indications that require load relief of
a compartment via the 3-point principle,
physiological support and stabilisation
in accordance with the 4-point principle
and, where required, limitation of the
range of motion of the knee joint, such
as:
• Severe medial or lateral compartment
osteoarthritis (class III at least) in
conjunction with complex ligament
instability.
• Before HTO (corrective osteotomy) for
unicompartmental load relief (brace
test)
• Following cartilage surgery or cartilage
regeneration
• Following surgical intervention on the
meniscus
Contraindications
Bilateral osteoarthritis of the knee
Risks / Side Effects
If the aids are too tight, this can cause
local pressure sores or constriction of
blood vessels or nerves. Therefore you
should consult the doctor treating you
before you use it if the following
circumstances apply to you:
• Condition or injury of the skin in the
area of application, particularly with
infectious indications (excessive heat,
swelling or reddening)
• Paraesthesia and circulatory disorders
(e.g. as seen in diabetes, varicose veins)
• Lymph drainage disorders – equally,
swelling of soft tissue adjacent to the
area of application which is not related
to a condition
When wearing snug-fitting aids, this can
result in localised skin inflammation or
irritation that is due to mechanical
irritation of the skin (particularly in
conjunction with sweating) or due to the
composition of the material.
Intended patient groups
Healthcare professionals should provide
care to the adults and children, applying
the available information on the
measurements/sizes and necessary
functions/indications and in line with
the information provided by the
manufacturer, and acting under their
own responsibility.
Setting the flexion and extension
limits (only to be done by an
othropaedic technician)
The orthosis is equipped with a 0°
extension wedge. It includes additional
wedges. The extension and flexion limits
should only be limited in accordance
with the instructions from the
responsible doctor. To avoid
hyperextension, extension wedges must
be used. The wedges exactly specify the
radius of motion of the orthosis. The
situation in soft tissue may cause
compression, making it necessary to use
a larger wedge to restrict the movement
of the knee to within the desired radius.
Select the required wedge. Extension
wedges are marked with an E and
flexion wedges with an F. Insert the
wedge into the joint and lock it by
clamping it with help of the frame ends.
The wedge then slides automatically
into the correct position and does not
rotate. Tighten the wedge using the
screw. It is sufficient to do this by hand.
No great force is necessary.
Setting the varus-valgus
decompression
Tip: Get the responsible technician to give
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