joint orthotic joint system joint for the production of an orthosis with stance phase control for stabilisation of the knee joint electronic electrical electromechanical activation of locking via sensors sensor system smartphone app

NEURO TRONIC System Knee Joint

The NEURO TRONIC system knee joint is suitable for the production of a custom-made KAFO (knee-ankle-foot orthosis) with microprocessor-controlled stance phase control. A stance phase-controlled orthosis with NEURO TRONIC system knee joint offers the patient safety in stance phase (mechanically locked) and dynamics in swing phase (mechanically unlocked) when walking. Thus, a natural gait is achieved.

The NEURO TRONIC system joint comes with a slim, anatomically shaped controller that contains all the electronics as well as the battery. The controller is discreetly integrated into the lower leg shell of the orthosis. The motion sensors in the controller register the position and movement of the lower leg and signal to the system knee joint when it should lock and unlock. The sensor data is processed 400 times per second by the high-performance microprocessor, which allows the system joint to react extremely quickly to situational changes when walking.

microprocessor-controlled orthosis KAFO SCO with stance phase control with joint orthotic joint system joint knee joint electronic electric electrohydraulic hydraulic activation of locking via sensors sensor system smartphone app

The new technology of the NEURO TRONIC system knee joint enables the patient to take the first step with the orthosis leg when changing from stance to gait. This is particularly useful for patients whose legs are both treated with an orthosis with stance and swing phase control, e.g. after bilateral paraplegia.

The system joint is preassembled at an angle of 5°, corresponding to a physiological knee joint angle. Via Bluetooth connection, the NEURO TRONIC is paired with the remote control included in the scope of delivery, which allows the patient to choose between the following modes:

  • Auto Mode: the system joint is locked when standing. Its ultra-fast high-performance microprocessor registers when the patient changes from standing to walking. The controller secures the knee against unwanted bending in stance phase by locking the system joint. In the swing phase, it unlocks again.
  • Free Mode: the system joint is permanently unlocked.
  • Lock Mode: the system joint is permanently locked.
remote control app smartphone smartwatch iPhone Apple Watch to control the orthotic joint NEURO TRONIC and orthoses locked in stance phase knee joint electronic electric lock via microprocessor-controlled sensors sensor system

Thanks to Bluetooth, the NEURO TRONIC can be operated by smartphone or smartwatch. The above-mentioned modes can thus be selected via different devices, according to the patient’s preference. For the operation of the system joint via smartphone or smartwatch, the User app can be downloaded free of charge.

The orthotist adjusts the settings of the system joint’s automatic function via the Expert app. Thus, the function of the orthosis can be easily and precisely adapted to the patient’s safety requirements and gait. After purchasing the product, the Expert app (for the orthotist) and the User app (for the patient) can be installed on one or more mobile devices of your choice.

Additionally to the option of changing the mode via electronic devices, the system joint can also be permanently unlocked (Free mode) in a mechanical way. This is ideal for activities like driving or cycling. The patient can unlock the system joint themself by means of a lever under the system joint.

gait phase control mechanism of an orthosis SCO with stance phase control with electromechanical NEURO TRONIC joint standing and walking stance phase locked swing phase free moving for a natural dynamic gait dynamics without stiff leg circumduction Trendelenburg locking before initial contact

Advantages for Patients

Splash Protection
The NEURO TRONIC system joint and the controller with the electronics are splashproof (IP44), which means that even walks on the beach or cycling in the rain with shorts are no problem.

Maximum Safety during Stance
The system joint detects small, unintentional steps during stance and remains locked.

Natural Transition from Standing to Walking
When the NEURO TRONIC system knee joint is used in Auto mode, the ultra-fast high-performance microprocessor registers a change from standing to walking in real time based on the sensor data and the controller switches the system joint to the integrated walking mode. If the patient stops or interrupts the step, the NEURO TRONIC immediately switches back to standing mode.

Automatic Stance Phase Control during Walking
In walking mode, the knee is locked in the stance phases of the gait cycle starting at terminal swing. The sensor detects the gait phase regardless of the angle between the lower leg and the ground as well as the knee angle. This way, the knee is secured reliably before initial contact. This also applies if the foot hits the ground with the knee bent, e.g. due to stumbling or when walking downhill.

The flexion of the knee is prevented in all stance phases up to mid stance. Consequently, the knee can be extended without resistance during swing phase. From terminal stance the lock is released so that the knee can be bent from pre swing to execute the swing phase. The knee flexion occurs without resistance, thus achieving a reliable physiological knee bending in mid swing. This prevents stumbling due to insufficient knee flexion. In terminal swing the system knee joint is locked again.

When changing between short and long or slow and fast steps, sensors, electronics and microprocessor ensure that the system joint locks and unlocks automatically as described above. In order to adjust the NEURO TRONIC to the individual safety requirements of the patient, the orthotist can set the time for exact locking and unlocking via the Expert App.

Advantages of an Orthosis with a NEURO TRONIC System Knee Joint

  1. very small system knee joint with intelligent motion sensors
  2. orthosis with this system knee joint can be worn under trousers
  3. designed specifically for the construction of a custom-made orthosis with full contact – anatomical shape and close fitting to the leg
  4. lightweight system joint enables the construction of a lightweight orthosis (1.2–1.5kg)
  5. characteristics mentioned in points 1 to 4 prevent disruptive rotational moments on the paralysed patient’s leg
  6. locking at any knee angle provides maximum safety when walking – even on slopes and uneven ground
  7. Bluetooth connection to the supplied remote control, smartphone or smartwatch
  8. permanent unlocking of the system joint possible, e.g. for driving or cycling
  9. gait data from the motion sensors is processed 400 times per second by the ultra-fast high-performance microprocessor
  10. maximum safety for the patient – orthosis reacts immediately to changes in gait, step length and step speed
  11. first step is possible with left or right leg – prevents problems if both legs are treated
  12. high performance rechargeble battery
  13. splashproof according IP44 – combination with waterproof NEURO SWING Carbon system ankle joint possible
  14. no certification required due to FIOR & GENTZ 360° orthotics
  15. no test fitting necessary – functional analysis and calculation are carried out by the Orthosis Configurator taking into account all patient data
  16. unilateral construction possible

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