Blatchford EchelonER Hydraulic Ankle with Extended Range Instruction Manual
- June 12, 2024
- Blatchford
Table of Contents
EchelonER
Instructions for Use
ECER22L1S–ECER30R8S
ECER22L1SD–ECER30R8SD
Description and Intended Purpose
These instructions are for the practitioner.
The term device is used throughout these instructions for use to refer to
EchelonER.
Application
The device is to be used exclusively as part of a lower limb prosthesis.
Intended for a single user.
This device provides limited self-alignment of the prosthesis on varied
terrain and allows the ankle to adjust to a moderate variation in heel
heights. It is intended to improve on postural sway and symmetry while easing
abnormal pressures at the socket interface. A moderate-energyreturn foot with
multi-axial ankle movement.
Independent heel and toe springs provides some axial deflection.
The split toe provides good ground compliance.
Activity Level
This device is recommended for users that have the potential to achieve
Activity Level 3 who may benefit from enhanced stability and an increase in
confidence on uneven surfaces.
Of course there are exceptions and in our recommendation we want to allow for
unique, individual circumstances. There may also be a number of users in the
Activity Levels 2 and 4 who would benefit from the enhanced stability
offered by the device, but this decision should be made with sound and
thorough justification.
Activity Level 1
Has the ability or potential to use a prosthesis for transfers or ambulation
on level surfaces at fixed cadence. Typical of the limited and unlimited
household ambulator.
Activity Level 2
Has the ability or potential for ambulation with the ability to traverse low-
level environmental barriers such as curbs, stairs, or uneven surfaces.
Typical of the limited community ambulator.
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.
Activity Level 4
Has the ability or potential for prosthetic ambulation that exceeds basic
ambulation skills, exhibiting high impact, stress, or energy levels. Typical
of the prosthetic demands of the child, active adult, or athlete.
Maximum user weight 100 kg and always use one higher spring rate category than shown in the Spring Set Selection table.
Contraindications
This device may not be suitable for Activity Level 1 individuals, users with
poor balance, or users who take part in competitive sports events, as these
types of users will be better served by a specially-designed prosthesis
optimized for their needs. Users who require additional support when standing,
e.g. bilaterals, may benefit from an ankle with a reduced range of DF
movement–see Bench Alignment section, or an ankle with a standing mode lock.
Due to the large potential range of ankle movement, it is essential to ensure
that the user has understood all instructions for use, drawing particular
attention to the sections regarding safety and maintenance.
Clinical Benefits
- Increased ground clearance reduces risk of trips and falls
- Improved balance through self-alignment
- Improved ground compliance for slope negotiation
- Improved kinetic gait symmetry
- Reduced loading on the residual limb
- Increased walking speed
Spring Set Selection
Activity Level 3
Notes:
If in doubt choosing between two categories, choose the higher rate spring
set.
Foot Spring set recommendations shown are for transstadial users.
For transfemoral users we suggest selecting a spring set one category lower,
refer to Section 8 Fitting Advice to ensure satisfactory function and range of
movement.
Safety Information
This warning symbol highlights important safety information which must be
followed carefully.
Ensure only suitably retrofitted vehicles are used when driving. All persons
are required to observe their respective driving laws when operating motor
vehicles.
Do not ascend /descend ladders, the added range of DF/PF motion may cause the
foot to slip.
Due to the amount of ankle movement available with this device, take extra
care when operating any form of machinery.
Be aware of finger trap hazard at all times. It is recommended that a flexible
cosmetic cover is used to minimise risk.
Always use a hand rail when descending stairs and at any other time if
available.
Following activities which result in a high degree of self alignment e.g.
after sitting or stairs descent, weight should be applied in a neutral
position to restore the foot to its optimal standing position.
Any changes in the performance or function of the limb e.g. restricted
movement, non-smooth motion or unusual noises should be immediately reported
to your service provider.
The device is not suitable for extreme sports, running or cycle racing, ice
and snow sports, extreme slopes and steps.
Any such activities undertaken are done so completely at the users’ own risk.
Recreational cycling is acceptable.
Assembly, maintenance and repair of the device must only be carried out by a
suitably qualified clinician.
To minimise the risk of slipping and tripping, appropriate footwear that fits
securely onto the footshell must be used at all times.
After continuous use the ankle casing may become hot to the touch.
Avoid exposure to extreme heat and/or cold, which may affect ankle stiffness.
The user must not adjust or tamper with the setup of the device.
The user should contact their clinician if their condition changes.
Construction
Principal Parts:
- Hydraulic Body Assembly including pyramid (aluminum/St. Stl./titanium)
- Carrier Assembly (aluminum/St. Stl.)
- Heel & Toe Springs (e-carbon)
- Spring Attachment Screws (titanium/St. Stl.)
- Glide Sock (UHM PE)
- Foot Shell (PU)
Function
This device comprises a hydraulic body assembly containing adjustable hydraulic valves. The valves can be independently adjusted to increase and reduce hydraulic resistance of plantar and dorsiflexion. The hydraulic body assembly is connected to a carrier assembly via two pivot pins. Heel and toe springs are attached to the carrier assembly using titanium and stainless steel screws. The foot is wrapped in a UHM PE sock which is in turn surrounded by a PU foot shell.
Maintenance
Maintenance must be carried out by competent personnel.
It is recommended that the following maintenance is carried out annually:
- Remove the foot shell and glide sock, check for damage or wear and replace if necessary.
- Clean and check moving parts for signs of damage due to ingress of debris.
- Check all screws for tightness (see Construction section), clean and reassemble as necessary.
- Visually check the heel and toe springs for signs of delamination or wear and replace if necessary. Some surface damage may occur after a period of use, this does not affect the function or strength of the foot.
The user should be advised:
Any changes in performance of this device must be reported to the
practitioner.
Changes in performance may include:
- Increase in ankle stiffness
- Reduced ankle support (free movement)
- Any unusual noise
The practitioner must also be informed of any changes in body weight and/or
activity level.
The user should be advised that a regular visual check of the foot is
recommended, signs of wear that may affect function should be reported to
their service provider (e.g. significant wear or excessive discoloration from
long term exposure to UV).
Cleaning
Use a damp cloth and mild soap to clean outside surfaces, do not use
aggressive cleansers.
Limitations on Use
Intended Life
A local risk assessment should be carried out based upon activity and usage.
Lifting Loads
User weight and activity is governed by the stated limits.
Load carrying by the user should be based on a local risk assessment.
Environment
This device is waterproof to a maximum depth of 1 meter.
Thoroughly rinse with fresh water after use in abrasive environments such as
those that may contain sand or grit, for example, to prevent wear or damage to
moving parts.
Thoroughly rinse with fresh water after use in salt or chlorinated water.
Foot products must be adequately finished to prevent water ingress into the
foot shell where possible. If water enters the foot shell, the limb should be
inverted and dried before further use.
It is recommended that only Blatchford products be used in conjunction with
the device.
Exclusively for use between -15 ˚C and 50 ˚C (5 ˚F and 122 ˚F).
Bench Alignment
7.1 Static Alignment
Align transfemoral devices according to fitting instructions supplied with the
knee.
Ensure knee components are setup to provide adequate stability under all
circumstances at the completion of alignment and adjustment of the device.
Keep the build line between pivots as shown, using shift and/or tilt devices
as necessary.
Nominal Tilt Setting
Align limb to achieve 25° range of motion as shown.
The ankle may be aligned with a reduced DF range of 3° to suit users who require additional support when standing e.g. bilaterals. Note that this will result in the PF range increasingto 22°.
7.2 Biomimetic Alignment
The aim of alignment is to achieve a “balance point” while standing and set
the hydraulically damped range of motion. The aim of damping adjustment is to
fine tune the ankle-foot rollover stiffness characteristics until a
comfortable gait is achieved.
Due to the increased range of motion provided by the ankle the user may
experience the need for more voluntary control and initially find the ankle
disconcerting during setup.
This should quickly pass upon completion of satisfactory setup.
*Ensure that the user is relaxed and not resting on the dorsiflexion limit.
7.3 Biomimetic Adjustment
Note…Carry out static alignment while ensuring the user has some means of
support such as parallel bars. This is standing alignment only.
7.4 Dynamic Adjustment
Adjustment of the Hydraulic Valves
The user should experience the ankle moving with the body through the gait
cycle. There should be no effort exerted by the user to overcome the hydraulic
resistance of the ankle.
Guidance
Following dynamic adjustment, trial the foot/ankle on ramps and stairs. Ensure
the user is comfortable with the kind of terrain he/she may normally be
expected to encounter. If the user reports any issues with comfort, usability
or range of movement of the ankle, adjust accordingly. When descending stairs,
in order to prevent the foot plantar flexing excessively, the foot should be
positioned such that the edge of the step corresponds to the middle of the
device.
Fitting Advice
The correct alignment (A–P position), range of motion (distribution of plantar
to dorsiflexion) and adjustment of the hydraulic settings are critical in
achieving a smooth roll over and correct slope adaptation (see Biomimetic
Adjustment section).
The springs for this device will be supplied assembled with heel and toe
springs of the same category. 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:
- Incorrect spring selection
- Incorrect A–P shift alignment
- Incorrect distribution of plantar and dorsiflexion range will have a negative effect on function and stability
| Symptoms| Remedy
---|---|---
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|
1.Increase plantar flexion resistance
2.Check A-P shift alignment ensure foot is not too anteriorly positioned
3.Check distribution of plantar and dorsiflexion movement ensure that the
plantar flexion range is not excessive
4.Check spring category is not too soft, if so fit a higher rate spring
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| 1.Reduce plantar flexion
resistance
2.Check A-P shift alignment; ensure foot is not too posteriorly positioned
3.Check distribution of plantar and dorsiflexion movement ensure that there is
adequate plantar flexion range
4.Check the spring category is not too high for the weight and activity of the
user, if so fit lower rate spring
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| 1.Increase dorsiflexion resistance
2.Check A-P shift alignment; ensure foot is not too posteriorly positioned
3.Check distribution of plantar and dorsiflexion movement ensure that there is
not excessive dorsiflexion range
4.Check the spring category is not too soft for the weight and activity of the
user, if so fit higher rate spring
Assembly Instructions
Be aware of finger trap hazard at all times.
Use appropriate health and safety equipment at all times including extraction
facilities.
9.1 Foot Shell Removal
9.2 Spring Replacement
Technical Data
Operating and | -15 ˚C to 50 ˚C |
---|---|
Storage Temperature Range: | (5 ˚F to 122 ˚F) |
Component Weight (Size 26N) | 990 g (2.2 lb) |
Activity Level: | 3 |
Maximum User Weight: | 125 kg (275 lb) |
Proximal Alignment Attachment: | Male Pyramid (Blatchford) |
Range of Hydraulic Ankle Motion
(excludes additional range of motion
provided by heel and toe springs)| 19 degrees plantar flexion
to 6 degrees dorsiflexion
Build Height:
(See diagram below)| (sizes 22–24) 142 mm
(sizes 25–26) 147 mm
(sizes 27–30) 152 mm
Heel Height| 10 mm
Fitting Length
Size | A | Size | B |
---|---|---|---|
22–24 | 142 mm | 22–26 | 65 mm |
25–26 | 147 mm | 27–28 | 70 mm |
27–30 | 152 mm | 29–30 | 75 mm |
Ordering Information
Order Example
*Sizes 25–28 only. For all other sizes, omit the Width field.
Available from size 22 to size 30:
ECER22L1S to ECER30R8S
ECER22L1SD to ECER30R8SD (add ‘D’ for a dark tone foot shell)
Spring Kits
Rate| Foot sizes
Small (S)| Medium (M)| Large (L)| Extra Large (XL)
22-24| 25-26| 27-28| 29-30
Set 1| 539801S| 539810S| 539819S| 539828S
Sett| 539802S| 539811S| 539820S| 539829S
Set 3| 539803S| 539812S| 5398215| 5398305
Set 4| 5398045| 5398135| 5398225| 5398315
Set 5| 5398055| 5398145| 5398235| 5398325
Set 6| 5398065| 5398155| 5398245| 539833S
Set 7| 5398075| 5398165| 5398255| 5398345
Set 8| 5398085| 5398175| 5398265| 5398355
Foot Shell (for dark add ‘D’)| Glide Sock
---|---
Size/Side| Narrow| Wide
22L| 539038S| | 531011
22R| 539039S|
23L| 539040S|
23R| 539041S|
24L| 539042S|
24R| 539043S|
25L| 539044SN| 539044SW
25R| 539045SN| 539045SW
26L| 539046SN| 539046SW
26R| 539047SN| 539047SW
27L| 539048SN| 539048SW| 532811
27R| 539049SN| 539049SW
28L| 539050SN| 539050SW
28R| 539051SN| 539051SW
29L| | 539052S
29R| | 539053S
30L| | 539054S
30R| | 539055S
Liability
The manufacturer recommends using the device only under the specified
conditions and for the intended purposes. The device must be maintained
according to the instructions for use supplied with the device. The
manufacturer is not liable for any adverse outcome caused by any component
combinations that were not authorized by them.
CE Conformity
This product meets the requirements of the European Regulation EU 2017/745 for
medical devices. This product has been classified as a class I device
according to the classification rules outlined in Annex VIII of the
regulation. The EU declaration of conformity certificate is available at the
following internet address:
www.blatchford.co.uk
| Medical Device
---|---
| Single Patient – multiple use
Compatibility
Combination with Blatchford branded products is approved based on testing in
accordance with relevant standards and the MDR including structural test,
dimensional compatibility and monitored field performance.
Combination with alternative CE marked products must be carried out in view of
a documented local risk assessment carried out by a Practitioner.
Warranty
The device is warranted for 36 months – foot shell 12 months – glide sock 3
months. The user should be aware that changes or modifications not expressly
approved could void the warranty, operating licenses and exemptions. See
Blatchford website for the current full warranty statement.
Reporting of Serious Incidents
In the unlikely event of a serious incident occurring in relation to this
device it should be reported to the manufacturer and your national competent
authority.
Environmental Aspects
Where possible the components should be recycled in accordance with local
waste handling regulations.
Retaining the Packaging Label
You are advised to keep the packaging label as a record of the device
supplied. mpatibility Combination with Blatchford branded products is approved
based on testing in accordance with relevant standards and the MDR including
structural test, dimensional compatibility and monitored field performance.
Combination with alternative CE marked products must be carried out in view of
a documented local risk assessment carried out by a Practitioner.
Warranty
The device is warranted for 36 months – foot shell 12 months – glide sock 3
months. The user should be aware that changes or modifications not expressly
approved could void the warranty, operating licenses and exemptions. See
Blatchford website for the current full warranty statement.
Reporting of Serious Incidents
In the unlikely event of a serious incident occurring in relation to this
device it should be reported to the manufacturer and your national competent
authority.
Environmental Aspects
Where possible the components should be recycled in accordance with local
waste handling regulations.
Retaining the Packaging Label
You are advised to keep the packaging label as a record of the device
supplied.
Manufacturer’s Registered Address
Blatchford Products Limited, Lister Road, Basingstoke RG22 4AH.
Trademark Acknowledgements
Echelon and Blatchford are registered trademarks of Blatchford Products
Limited.
Blatchford Products Ltd.
Unit D Antura
Kingsland Business Park
Basingstoke
RG24 8PZ
UNITED KINGDOM
Tel: +44 (0) 1256 316600
Fax: +44 (0) 1256 316710
Email:
customer.service@blatchford.co.uk
www.blatchford.co.uk
© Blatchford Products Limited 2022. All rights reserved.
References
- The Most Advanced Lower Limb Prosthetics in the World
- The Most Advanced Lower Limb Prosthetics in the World
- Blatchford Deutschland - Prothetik für die untere Extremität
- Blatchford France | Mobility Made Possible
- The Most Advanced Lower Limb Prosthetics in the World
- endoliteindia.com
- Ortopediske hjelpemidler | Ortopro AS