Otto Bock 28U24 Instructions For Use Manual page 17

4) Have the patient sit on a chair without footwear and with the orthosis. Position the foot at a
90° angle to the lower leg.
INFORMATION: Apply the orthosis so the ankle bone has adequate freedom of move­
ment and does not contact the spring.
5) Determine the position of the ankle bone and mark it on the orthosis frame with a small piece
of adhesive tape (see fig. 9).
6) Trim the orthosis sole (see fig. 10) so the markings on the shoe and the orthosis frame line up
(see fig. 11).
7) Adapt the shape of the sole according to the removable insole. In doing so, make sure that
the required external rotation of the foot is maintained (see fig. 10).
8) Insert the orthosis in the shoe and optionally cover it with an insole (see fig. 12).
9) Put on the orthosis together with the shoe (see fig. 13).
10) Measure the correct a-p (anterior-posterior) position of the knee joint (e.g. on the 3D
L.A.S.A.R Posture).
INFORMATION: The load line of the knee joint in the a-p position lies approx. 15 mm
in front of the compromise knee pivot point according to Nietert.
11) Optional: Use wedges as compensating elements to achieve the desired position.
For example, place a compensating element under the forefoot (see fig. 17) if the patient
stands with excessive flexion or place a compensating element under the heel (see fig. 18) if
the patient stands with excessive extension.
INFORMATION: Optionally, materials other than those supplied may also be used to
build up the bottom sole.
12) Optional: Sand the upper edge and the wings of the frontal support and modify the padding
accordingly.
NOTICE! The functionality of the orthosis must not be impaired. Do not sand in the
area of the spring or the surfaces!
13) Optional: If the patient has a foot deformity, correct it with an insole or a custom moulded
device.
28U24, 28U25:INFORMATION: The manufacturer offers the 28Z10 lateral pronation
strap as an accessory that can be attached to the lateral sole with hook-and-loop
fasteners. Frontal and dorsal traction stabilises the foot using hook-and-loop fasten­
ers in the area of the spring.
14) Close the textile component at calf height (see fig. 13).
Optional: Shortening the calf strap
> Put the orthosis on the patient.
1) Determine the length of the strap.
2) Remove the Y hook-and-loop and shorten the strap using scissors.
3) Fasten the Y hook-and-loop to the strap.
28U25 WalkOn Reaction junior, 28U34 WalkOn Reaction Lateral junior
► CAUTION! The Y hook-and-loop of the calf strap may be swallowed by young children.
Sew the Y-hook-and-loop to the calf strap after fitting.
Checking the fit of the orthosis
► Check that the orthosis is fitted properly before handing it over to the patient.
► Conduct trial walking with the patient. Testing on inclines, ramps and stairs is mandatory.
Fine tune as required.
5.3 Application
CAUTION
Incorrect or excessively tight application
Risk of local pressure and constriction of blood vessels and nerves due to improper or excess­
ively tight application
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