Otto Bock E-MAG Active 17B203 Instructions For Use Manual page 4

Introduction
1
2 mm (± 16 mm)
15 mm (± 17 mm)
60 mm (± 17 mm)
NOTICE
To ensure optimal functionality of the orthosis, the patient must generate a knee extension moment before heel lift-
off and also at heel strike.
Restriction of use:
INFORMATION
Not for use as a permanently locked orthosis with unilateral application.
1.6 Function and design
1.6.1 Function
The E-MAG Active is a knee joint system with stance phase control, which offers the user a free swing phase and
locks the knee joint for a secure stance phase prior to heel strike.
The E-MAG active is equipped with an electronic lock; the lock is released during toe-off, allowing the user to
swing the paralysed leg in a physiological manner. Prior to heel strike, the knee joint locks in the extended position
and the user can step down safely.
The E-MAG Active has an additional locking function (PreLock) that is activated at 15° of flexion. This secures the
patient even before the swing phase as such ends. Subsequently the knee joint is fully locked when it reaches the
extension stop.
1.6.2 Components
2
A
B
4
In the sagittal plane, the vertical component of the ground
reaction force runs 60 mm (±17 mm) anterior to the ankle
pivot point, 15 mm (±17 mm) anterior to the knee joint pivot
point according to Nietert and 2 mm (±16 mm) posterior to
the Trochanter Major. In the frontal plane, the vertical com­
16 mm (± 11 mm)
ponent of the ground reaction force runs 16 mm (±9 mm)
laterally from the centre of the ankle and 16 mm (±11 mm)
laterally from the centre of the knee.
16 mm (± 9 mm)
A
B
C
C
Knee joint, upper section (stainless steel), mag­
netic control with lock, cover (plastic)
Knee joint, lower section (stainless steel)
30Y297=* dummy for knee joint
17B203=* E-MAG Active