Fitting Advice - endolite ECVT22L1 Instructions D'utilisation

7 Fitting Advice

The correct alignment (A-P position), range of motion (distribution of plantarflexion to
dorsiflexion) and adjustment of the hydraulic settings are critical in achieving a smooth roll over
and correct slope adaptation (see 6.3).
The EchelonVT axial springs are designed to work together with the heel and toe springs to give
smooth progression for most users. The axial spring controls both compressive and torsional
resilience and typical axial movement should be between 3-6mm for normal walking.
EchelonVT is available with a choice of 4 axial spring rates (see section 1.0 for details).
Allow the user some time to become familiar with the initial set-up.
If after following the instructions below you still have problems with the function please contact
the sales team in your area for advice.
Any of the following will have a negative effect on function and stability:
• Incorrect spring selection
• Incorrect A-P shift alignment
• Incorrect distribution of plantarflexion and dorsiflexion range
Symptoms:
1.
• Sinking at heel strike
• Difficulty in achieving a
smooth progression to
mid stance
• User feels they are
walking up hill or forefoot
feels excessively long
2. • Progression from heel
strike to mid stance is too
rapid
• Difficulty in controlling
the energy return from
the foot at the heel strike
(reduced knee stability)
• User feels heel is too
hard, fore foot is too short
3. Heel contact and progression
feel OK but:
• Forefoot feels too soft
• Forefoot feels too short
• User feels they are
walking down hill,
possibly with reduced
knee stability
• Lack of energy return
• Increase plantarflexion resistance
• Check A-P shift alignment; ensure foot is not too
anteriorly positioned
• Check distribution of plantarflexion and
dorsiflexion movement; ensure that the plantar-
flexion range is not excessive
• Check spring category is not too soft, if so fit higher
rate spring
• Reduce plantarflexion resistance
• Check A-P shift alignment; ensure foot is not too
posteriorly positioned
• Check distribution of plantarflexion and
dorsiflexion movement; ensure that there is
adequate plantarflexion range
• Check the spring category is not too high for the
weight and activity of the patient, if so fit lower rate
spring
• Increase dorsiflexion resistance
• Check A-P shift alignment; ensure foot is not too
posteriorly positioned
• Check distribution of plantarflexion and
dorsiflexion movement;
ensure that there is not excessive dorsiflexion range
• Check the spring category is not too soft for the
weight and activity of the patient,
if so fit higher rate spring
10
Remedy
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