Technical Information; Legal Information - Ottobock 28L20 Gebrauchsanweisung

(9) 709S10=2.5 Allen Wrench, 2.5 mm
(10) 501Z24=M4×4.5 Binding Head Hexagon Socket Screw 2.5 mm

4 Technical information

The anatomically formed thigh supports are divided into two and provided with parallel width ad-
justment. They guarantee exact adaptation to the thigh and good fit. The condyle wedge nearly
excludes that the orthosis will slip down. The adjustment range of the condyle bands is 55 mm.
To adjust the width of the bands, release the two binding head hexagon socket screws (2.5 mm).
Later adjustment of the condyle bands is possible through thermoplastic forming. The condyle
pads made of Pedilin® should be glued in place after initial fitting. A hook and loop closure serves
to close the orthosis. Pads for the hollow of the knee may additionally be attached.
Two ball joints are mounted between the medial condyle bands and the abduction unit. The range
of motion of these ball joints is limited to 45 degrees. Rubber collars serve to protect the ball joints.
This medial bearing of the abduction unit represents an essential biomechanical feature of the
orthosis and prevents torsion of the condyle band on the thigh.
The 28L20 Hip Abduction Orthosis is easy to use and waterproof.
5 Adjusting and applying the orthosis
The thigh condyle bands may be applied over bare skin, over cotton stockinette (623T1=6) or over
thin trousers. The width adjustment of the condyle bands may be adjusted beforehand, according
to taken measurements, or directly on the leg. For shifting the condyle bands (fig. 2) release the
two binding head hexagon socket screws (Allen Wrench 2.5 mm).
To apply the 28L20 Hip Abduction Orthosis, place the supports on the front of the child's thighs.
Take care to position the medial supracondylar profile correctly (fig. 3). Adjustment of the abduc-
tion unit is achieved by releasing the headless set screw (2.5 mm) (fig. 4). Initial fitting and later
adjustment of the orthosis should only be carried out by a physician or by an orthotist.
The outer telescope has a hole so that the width setting is documented with a marker (Fig. 5) and
markings, making it reproducible at any time after adjustments are made.
After adjustment of the orthosis, secure all screws with 636K13 Loctite!
6 Instructions for use
Parents should be instructed on the use of the orthosis at the time of fitting. Only the hook and
loop closures are needed to apply or remove the orthosis (fig. 6). Highly stable shoes with good
traction are suggested to help your child stand safely when wearing the orthosis. In addition, the
outer edge of the shoes may be wedged by 3 mm to make it easier to stand. The ball joints in the
orthosis minimize the torsion of the thigh supports, thus preventing a possible adduction at heel
strike. Your child's doctor will determine a daily wearing schedule for the hip abduction orthosis.
Since this orthosis is waterproof, it may remain in place during bathing and other activities. When
the radiological findings show a satisfying result, the child is to be weaned from the orthosis. In
general, the time to wean the child from the orthosis will extend over a period of 6 to 8 weeks.
During this period, abduction will be reduced every two weeks by 1 cm.

7 Legal information

All legal conditions are subject to the respective national laws of the country of use and may vary
accordingly.
6 | Ottobock 28L20