medi M.4 s OA Instrucciones De Uso página 5

M.4 s OA
®
Intended purpose
M.4s OA is a varus/valgus brace. The
product is exclusively to be used for the
orthotic fitting of the knee and only on
unbroken skin or if any wounds have
been properly covered.
Indications
• Serious medial or lateral gonarthrosis
(at least grade III) in connection with
compley ligament instability
• Cartilage surgery/chondroplasty/
meniscus refixation/changeover
osteotomy with necessary
postoperative relief of the medial or
lateral compartment
• Stress fracture
Contraindications
Combined medial and lateral
osteoarthritis
Mode of Action
This orthosis is intended to help you to
reduce stress on your knee. The orthosis
is used in both postoperative therapy
and in conservative (non-operative
treatment). It protects the leg from
swerving outwards. Stress is reduced on
the painful areas of the knee joint and
the orthesis brings a perceptible
reduction in pain. Some patients only
improve gradually.
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
you a thorough explanation about how to
adjust the M.4s OA. This well help you to
master the handling rapidly and to benefit
from optimal support from the orthosis.
Sit down and adjust the varus-valgus
adjustable joints to the neutral position,
using an Allen key. You have reached the
neutral position when the padding of the
orthosis joint is covering the surface, but
producing little or no pressure.
Stand up and set the tension to a quarter
cycle (on both adjusting screws). This is a
good initial setting for the first time you
wear the orthosis. If you want, you can
adjust the orthosis to the breadth of your
knee with the various joint pads enclosed.
Take care that thebrace is sitting properly.
For conservative therapy (without an
operation), it should not be worn for more
than two hours per day in the beginning.
You can then wear it for longer periods,
depending on how well you tolerate it.
It is most important to wear the orthosis
for activities that normally cause pain. By
using the Allen key, the decompression
can gradually be adjusted over time, or
during the course of a day.
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