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1 Description and Purpose
Application:
These instructions are for use by the practitioner.
EchelonVT is to be used exclusively as part of a lower limb prosthesis.
This device provides limited self-alignment of the prosthesis on varied terrain and following footwear
changes. It is intended to improve on postural sway and symmetry while easing abnormal pressures
at the socket interface. The device also includes a spring element capable of absorbing axial and
rotational shocks intended to reduce sheer stresses at the residuum/socket interface. This device
is recommended for users that have the potential to achieve Activity Level 3 that may benefit from
enhanced stability and an increase in confidence on uneven surfaces. The additional shock absorption
and energy return supplied by the axial spring aims to improve comfort and performance.
There are exceptions and in our recommendation we want to allow for unique, individual
circumstances. There may also be a number of users of Activity Levels 2 and 4* who would benefit
from the enhanced stability offered by EchelonVT, but this decision should be made with sound and
thorough justification.
(*maximum user weight 100kg and always use one higher spring rate category than shown in the
Spring Set Selection table.)
To minimise the risk of slipping and tripping, appropriate footwear that fits securely onto the
footshell must be used at all times.
Be aware of finger trap hazard at all times.
Contra-indications:
This device may not be suitable for level 1 individuals or for competitive sports events, as these types
of users will be better served by a specially designed prosthesis optimized for their needs.
Intended for single user.
Ensure that the user has understood all instructions for use, drawing particular attention to the section
regarding Maintenance.
Spring Set Selection
User Weight
44-52
53-59
(100-115)
(116-130)
1
3
1
Activity Level 3
Has the ability or potential for ambulation with variable cadence.
Typical of the community ambulator who has the ability to traverse most environmental barriers
and may have vocational, therapeutic, or exercise activity that demands prosthetic utilization
beyond simple locomotion.
Note:
If in doubt choosing between two categories, choose the higher rate spring set.
Foot Spring set recommendations shown are for transtibial users.
For transfemoral users we suggest selecting a spring set one category lower, refer to fitting advice
Section 7 to ensure satisfactory function and range of movement
60-68
69-77
(131-150)
(151-170)
2
3
4
2
78-88
89-100
101-116
(171-195)
(196-220)
(221-255)
5
6
3
1
kg
117-125
(lbs)
(256-275)
Foot
7
8
Spring set
Axial shock
absorber
spring rate
4
938315S/2-0718
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