PROTEOR HYTREK Notice D'utilisation page 11

C. Adjustment
For patient safety reasons, the prosthetist/orthotist must begin the
adjustment process with the knee set to its factory settings and with the
patient walking between parallel bars.
The model of foot used may have an impact on the adjustment of the knee.
The knee should be readjusted whenever the foot is changed.
Prioritise patient safety in all circumstances, particularly to ensure that
slopes and stairs can be negotiated safely.
After performing any maintenance the knee must be readjusted.
A 2.5 mm Allen (hex) key, supplied with the knee, is used to make all the
adjustments.
Adjust as described below, ideally in the order indicated:
1. Adjusting the intensity of the resistance in the stance phase (Screw R)
The HYTREK knee is delivered with a fairly high resistance setting. The initial adjustments should be performed with care
and with safety in mind to avoid any risk of the patient falling.
Screw in the screw, 1/12th of a turn at a time, to increase the resistance in the stance phase (braking).
Unscrew to produce the opposite effect.
Then adjust more finely if required.
Adjustment range = ¾ of a turn (1 turn = same adjustment)
With the patient between parallel bars, and in order to define an initial stance resistance adjustment, ask the patient to sit
down on a chair.
Then, as a follow-up step after performing all the other adjustments on the knee, refine the resistance with the patient
walking, with alternating feet, down stairs and then down a slope, and always with a handrail next to the patient for safety
reasons.
2. Adjusting the threshold value for the transition to swing phase (Screw S)
The HYTREK knee is delivered with this adjustment set to a value that is suitable for most users.
The dynamic alignment should allow the transition to swing phase and the activation of braking. The threshold may be
modified if the swing phase does not initiate at the instant when the toes leave the ground (toe-off), or if resistance is not
in place at heel strike.
Screw in, one ¼ of a turn at a time, until there is no locking of the knee at toe-off.
Unscrew, one ¼ of a turn at a time, to facilitate the triggering of the brake, then fine adjust one 1/12th of a turn at a time.
Adjustment range = -1 turn/+2 turns
Do not fully unscrew screw S since this might damage the mechanism. If in doubt, reset the adjustment by turning the
screw until its head is flush with the surface.
There is a significant risk of the patient falling if this adjustment is set incorrectly.
3. Adjusting the flexion during the swing phase (Screw F)
Screw in, one 1/12th of a turn at a time, to limit the flexion during the swing phase, notably at fast walking paces.
Unscrew to produce the opposite effect.
Adjust more finely if required.
Adjustment range: ¾ of a turn (1 turn = same adjustment)
4. Adjusting the absorption of the terminal impact (Screw E)
Screw in, one ¼ of a turn at a time, to increase the absorption of the terminal impact (at the end of extension).
Unscrew to produce the opposite effect, and then adjust more finely if required.
Adjustment range: ± 1 turn
Once these adjustments have been made, ensure that the knee returns to full extension when walking slowly to ensure that there is
no risk of the patient falling.
INSTRUCTIONS FOR USE Page 4 of 6
Factory settings
E is screwed in to
its maximum,
then unscrewed
2 turns.
Screwing in
increases the effect
of the adjustment