Ottobock 17B203 Serie E-MAG Active Gebrauchsanweisung Seite 28

Introduction
1.4 Indication
INFORMATION
For further information on indications and patient prerequisites, we recommend consulting the brochure
646A214.
This product is suitable for the following indications:
Paresis and paralysis of knee stabilising muscles and muscle groups due to various fundamental diseases that
affect the spinal cord, the central nervous system, the peripheral nervous system or the musculature.
Physical prerequisites such as muscle status, mobility grade and axis deviations that guarantee proper control of
the orthosis are crucial. Additional indications and the selection of a suitable system for your patient mainly depend
on existing muscle strength, joint mobility and axis deviations, which, viewed collectively, determine patient suitabil­
ity for one joint system or another.
1.5 Contraindications
Contraindications:
• Contractions in the knee joint that prevent relieving the knee joint lock
• Uncontrollable spasms
• Tuberosity supports
Additional contraindications when used without a medial support:
• Non-physiological deviations in the frontal plane (see fig. 1)
• Non-physiological deviations in the sagittal plane (see fig. 1)
• Instabilities of the capsular/ligamentous apparatus
Additional contraindications when used with a medial support:
• Flexion contractures in excess of 15°
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.
For safety, the E-MAG Active has an additional lock 10° before full extension (PreLock function). The additional
lock ensures safety for the user if final extension is not fully reached.
28 | Ottobock
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)
17B203=* E-MAG Active