joint orthotic joint system joint for the production of an orthosis to control stabilisation of knee joint free moving monocentric with posterior offset with precisely adjustable dynamic extension stop knee angle fine adjustment spring force adjustable spring unit exchangeable

NEURO VARIO-SWING System Knee Joint with plug + go Modularity

The NEURO VARIO-SWING system knee joint is a free moving, monocentric joint. Due to an integrated posterior offset, it provides a secure stance. It has a dynamic, adjustable extension stop. The range of motion in extension can be infinitely adjusted from 0° to 20° by using the alignment screw. The bumping noises are minimised thanks to the extension stop damper.

The dynamic extension stop enables an extending movement against resistance which exceeds the set extension angle (e.g. from 5° downwards to 0°). The resistance in extension can be modified by using interchangeable spring units. The range of motion of the spring’s range can be infinitely limited by using the motion limiting screw. Depending on the selected spring unit, the maximum range of motion of the spring’s range is between 3° and 9°.

STANCE

Not only when walking, but also during stance, this extension stop provides dynamic for the patient. This allows the patient to push the knee into a slight hyperextension against the resistance of the spring unit while standing. This additional range of motion guarantees the highest possible wearing comfort and stability.

Graphic illustration of a patient with custom-made orthosis knee-ankle-foot KAFO with a NEURO VARIO-SWING system knee joint orthotic joint in stance. Due to the yielding of the dynamic spring unit, a slight hyperextension of the knee is possible. This ensures a high level of stability and additional range of motion.
WALKING

When walking, the dynamic extension stop enables a complete knee extension, which is physiological for many patients between mid stance and terminal stance.

The transmission of the stop impacts to the patient leg is dampened by the dynamic extension stop.

Graphic custom-made orthosis knee-ankle-foot KAFO medical device with a NEURO VARIO-SWING system knee joint orthotic joint and a NEURO SWING system ankle joint. The infinitely adjustable stops allow the knee flexion angle to be adjusted to the tibial inclination. Knee extension is possible due to the yielding of the dynamic spring unit, and the patient has more stability in stance.
Graphic table shows the gait phase terminal stance during which patients with a physiological gait can achieve full extension of the knee. Absorption of the stop impacts and thus the noises are minimized by extension stops. The dynamic extension stop and the adjustable resistance (yielding) of the spring unit enable controlled range of motion both when standing and walking, provided the knee angle is set correctly.

The NEURO VARIO-SWING system knee joint is ideally combined with a system ankle joint with an infinitely adjustable dynamic dorsiflexion stop, such as the NEURO SWING system ankle joint. Thus, the knee flexion angle can be adjusted optimally to the correct tibia inclination.

plug + go Modularity

Furthermore, the system joint is equipped with plug + go modularity. This means that it can be converted into any other system ankle joint with plug + go modularity by exchanging the functional unit.

Functional Unit

The functional unit of the NEURO VARIO-SWING system ankle joint consists of the following functional elements:

  1. screw unit
  2. motion limiting screw
  3. precompressed spring unit
  4. stop damper
  5. guide ring with extension stop

You can learn more about this topic in our online tutorials:

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