
1 Foreword English
INFORMATION
Date of last update: 2023-09-29
►Please read this document carefully before using the product and observe the safety notices.
►Instruct the user in the safe use of the product.
►Please contact the manufacturer if you have questions about the product or in case of problems.
►Report each serious incident in connection with the product, in particular a worsening of the state of health, to
the manufacturer and to the relevant authority in your country.
►Please keep this document for your records.
These instructions for use provide important information on the processing of the 17B203 E–MAG Active orthotic
knee joint.
A quick start guide is available for the user, providing an overview of the E-MAG Active functions.
Provide the user with the instructions for use and the quick start guide upon delivery of the orthosis, and point out
the semi-annual maintenance intervals.
2 Product description
2.1 Available sizes
INFORMATION
The subsequent conversion of the E-MAG 5° flexion lower part to 7.5° may only be completed by an authorised
Ottobock Service Centre.
Article number Material Pre-flexion 17B206 medial support Max. body weight
17B203=L/R,
17B203=L/R-7.5
Steel 5° and 7.5° Without medial support Up to 85kg
17B203=L/R,
17B203=L/R-7.5
Steel 5° and 7.5° With medial support Up to 100kg
2.2 Function/design
Function
The E-MAG Active is an orthotic joint with stance phase control which offers the user a free swing phase and locks
the orthotic joint for the stance phase prior to heel strike.
The E-MAG Active features an electronic lock that is released during toe-off, allowing the user to swing the para
lysed leg in a physiological manner. Prior to heel strike, the orthotic joint locks in the extended position so the user
can step down safely.
The E-MAG Active has an additional locking function (PreLock) that is activated at 15° flexion. This secures the
patient even before the actual swing phase ends. The orthotic joint is then fully locked when it reaches the exten
sion stop.
Design
The bushing (radial bearing) and axial washer (axial bearing) are made of maintenance-free plastic. The lock
wedge is electronically controlled via an electromagnet. The electronic control unit consists of a gyroscope and 2D
acceleration sensors to record the gait phase. It measures the position while the user is walking and unlocks the
orthotic joint prior to toe-off and then locks it again in the extended position prior to heel strike.
The open insertion zones serve to attach the lamination bars. The electronic components are designed to be
replaced by a technician. The battery can be removed from the battery receptacle on the orthosis and charged in
the charger. The charger has two ports so two batteries can be charged simultaneously.
4 17B203=* E-MAG Active
Foreword