
NEURO FLEX MAX Lock Function
The NEURO FLEX MAX system knee joint is a locked system joint. A treatment with a locked system knee joint can be appropriate in case of an overall unfavourable situation and a correspondingly poor general condition of the patient. Due to the lack of knee flexion in swing phase, the use of locked system knee joints usually leads to an unphysiological gait with necessary compensation mechanisms. However, locked system joints are often unavoidable, especially in cases of severe flexion contractures. The NEURO FLEX MAX system knee joint can be unlocked for sitting down.
The patient can unlock it via a lock lever or a pulling cable. In the standard version, the system joint is preassembled at an angle of 5°, corresponding to a physiological knee joint angle and is also available preassembled at the flexion angles 10°, 15°, 20°, 25° or 30° if required.

Unlike the preassembled system joint, the locking of the flexion angle is adjustable. It can be set to 5°, 10°, 15°, 20°, 25° or 30°. This is done easily and precisely by exchanging the extension stop and the flexion stop disc. The system joint can be adapted to changes in the patients' condition. The flexion stop disc does not need to be filed.

In addition, the system joint has a permanent unlock function and can be used as a free-moving, monocentric system joint with integrated posterior offset. For this purpose, the lever is fixed with a locating pin. This function as well as its reversion can be performed by the patient at any time.
Alternative Function: Furthermore, accessory parts can be used to limit the maximum knee flexion angle (50°–90°) in steps of 10°. For this purpose, it is necessary to mount a flexion stop disc and cover plate specific to the alternative function and, if necessary, to file the flexion stop disc at the second stop. Other flexion angles can be obtained by exchanging the extension stop and filing the flexion stop disc at the first stop.

The NEURO FLEX MAX system knee joint with lock function can also be converted into the NEURO FLEX MAX system knee joint with step lock function. To do so, the locking pawl and the flexion stop disc must be replaced by a step lock pawl and a step lock stop disc.

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