Fitting Advice - Blatchford Avalon K2-VAC Instructions D'utilisation

7 Fitting Advice

The correct alignment (A-P position), range of motion (distribution of plantar flexion to
dorsiflexion) and adjustment of the hydraulic settings are critical in achieving a smooth roll over
and correct slope adaptation (see 6.3).
The user should feel the vacuum effect after taking approximately 15-20 steps depending on the
initial socket fit.
The following conditions will have a negative effect on the function and stability of the device:
• Incorrect A-P shift alignment
• Incorrect distribution of plantar flexion and dorsiflexion range
Ankle Assembly
Sinking at heel strike
Difficulty in achieving a smooth
progression to mid stance
1.
User feels they are walking up hill
or forefoot feels excessively long
Progression from heel strike to mid
stance is too rapid
User feels heel is too hard, fore
2.
foot is too short, or reduced knee
stability.
Heel contact and progression feel
OK but:
Forefoot feels too soft
3.
Forefoot feels too short
User feels they are walking down
hill, possibly with reduced knee
stability
Forefoot feels too rigid
Forefoot feels too long
Feels like walking up hill
4.
Symptoms
1. Increase plantar flexion resistance
2. Check A-P shift alignment; ensure foot is not
too anteriorly positioned
3. Check distribution of plantar flexion and
dorsiflexion movement; ensure that the
plantar flexion range is not excessive
1. Reduce plantar flexion resistance
2. Check A-P shift alignment; ensure foot is not
too posteriorly positioned
3. Check distribution of plantar flexion and
dorsiflexion movement; ensure that there is
adequate plantar flexion range
1. Increase dorsiflexion resistance
2. Check A-P shift alignment;
ensure foot is not too posteriorly positioned
3. Check distribution of plantar flexion and
dorsiflexion movement; ensure that there is
not excessive dorsiflexion range
1. Reduce dorsiflexion resistance
2. Check A-P shift alignment;
ensure foot is not too anteriorly positioned
3. Check distribution of plantar flexion and
dorsiflexion movement; ensure that there is
sufficient dorsiflexion range
14
Remedy
938432/3-1219