Netti DYNAMIC foot support Dual 100N User manual

UM0115 UK 2021-03
III HD
Patent EP 2836184
DYNAMIC leg support
This product conforms to
2017/745/EU for medical products.
User Manual &
Mounting Description

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CONTENTS
1. INTRODUCTION TO NETTI DYNAMIC LEG SUPPORTS 4
2. NETTI DYNAMIC DUAL  FEATURES 5
FUNCTIONAL OVERVIEW 6
3. DAILY USE 8
3.1 MOUNT THE LEG SUPPORTS 8
3.2 ANKLE HUGGERS 8
3.3 FOOTPLATE LOCK 9
4. ADJUSTING THE NETTI DYNAMIC LEG SUPPORT TO THE USER 10
4.1 LEG SUPPORT HEIGHT ADJUSTMENT 10
4.2 FOOTBOARD HEIGHT ADJUSTMENT 10
5. CALF SUPPORTS ADJUSTMENT 11
5.1 CALF SUPPORT HEIGHT ADJUSTMENT 11
5.2 CALF SUPPORT DEPTH ADJUSTMENT 12
5.3 LOCKING THE NETTI DYNAMIC DUAL LEG SUPPORT 12
6. FOOTPLATE ANGLE ADJUSTMENT 13
6.1 NETTI DYNAMIC DUAL FOOTBOARD  ANGLE ADJUSTMENT 13
7. NETTI DYNAMIC LEG SUPPORTS FOR DIFFERENT LEG LENGTHS 14
7.1 ONESIDED FOOTBOARD DEPTH ADJUSTMENT 14

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8. CHAIR WIDTHS, HEIGHTS AND FABRIC
FOR NETTI DYNAMIC DUAL LEG SUPPORT 16
9. TRANSPORT 17
10. MAINTENANCE 17
11. TROUBLESHOOTING 18
12. TESTS & WARRANTY 18

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A wheelchair with dynamic system must be adjusted
and operated dierent than static wheelchairs.
Please study this manual and also pay careful
attention to the user manual for the wheelchair
where the dynamic leg supports have been
mounted.
Important points are marked with the following
symbols:
Symbol of forbidden actions.
No warranty can be claimed whenever
these actions are implemented.
Symbol of warning.
Whenever this symbol is used,
caution has to be taken.
Symbol for important information.
Symbol for useful tips.
Symbol for tools.
1. INTRODUCTION
TO NETTI DYNAMIC
LEG SUPPORTS
THE CONCEPT: NETTI DYNAMIC SYSTEM
WHAT IS NETTI DYNAMIC SEATING?
Netti Dynamic System is a tilt and recline wheelchair
which allows controlled Open Kinetic Chain (OK-C)
movements of the user.
Static comfort wheelchairs can be accommodated
to support the user’s distal segments. The controlled
OK-C movement has an extra impact:
The distal segments can move, with a moderate
resistance. OK-C helps to gain control of the proximal
segments, especially when the user cannot inhibit
muscle movements due to their medical condition.
EXAMPLES OF INVOLUNTARY MOVEMENTS ARE:
• Dystonia – involuntary, sustained or intermittent
muscle contractions that can cause twisting and
repetitive movements, abnormal posture or both.
Muscle tone varies from normal or hypotonia to
hypertonia.
• Athetosis – slow, involuntary writhing movement.
• Chorea – brief, irregular jerking movements.
• Tremor – this is a rhythmic movement of part of
the body.
• Hemiballism – these are wild inging / throwing
movements of one arm or leg, usually occurring as
a result of a cerebrovascular event.
• Clonus – rapid muscle jerks that are frequently
repetitive.
A more detailed description of diagnosis and Netti
Dynamic product recommendations is described in
the User Manual UM0116 of the total Netti Dynamic
System.
Before using Netti Dynamic System (NDS)
or any of its components, a seating
assessment should be carried out by
a trained professional.

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2. NETTI DYNAMIC
DUAL  FEATURES
Netti Dynamic leg support DUAL is especial
designed for users pushing with uneven force with
their lower extremities, providing open kinetic chain.
The gas cylinders works independent and allows for
the leg supports to be extended dierently – tilting
the footboard sideways and also tilting it forwards.
This multitude of possible exible movements –
gives the user freedom to perform voluntarily and
involuntarily leg movements to very high degree.
When the extension forces are reduced, the gas
cylinders gently brings the feet and legs back to the
original foot position.
The wear and tear on the wheelchair is
substantially reduced since the forces
applied, are absorbed by the exible system.

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FUNCTIONAL OVERVIEW
The Netti Dynamic leg supports allow controlled
Open Kinetic Chain (OK-C) movements of the lower
extremities of the user.
Unlike static wheelchairs, the user’s distal segments
are supported but can move. This helps to gain
control of the proximal segments especially when
the user cannot inhibit movements due to their
medical condition.
Users with uneven movements of the lower
extremities must use Netti Dynamic DUAL leg
supports.
Netti Dynamic System DUAL leg support allows
for dynamic:
• Plantar exion of the feet
(leg support pivots anteriorly)
• Unilateral extension of the hip
(single leg support goes down)
• Knee extension:
(leg supports move forwards)
When tone decrease, the lower extremities
will be supported towards their resting
position.

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LEG SUPPORT ADJUSTMENTS
For each user adjustments are required in order
to meet the unique user needs.
The adjustment should be carried out
by a trained professional
The Netti Dynamic leg support product range
ts to dierent seat widths.
Available sizes: see table on page 15.
NETTI DYNAMIC DUAL LEG SUPPORT
is especially developed to allow for uneven forces
from the legs. Unilateral extension of the hip
(left or right part of the leg support goes down).
Netti Dynamic DUAL leg support is oered in
two dierent lengths.
Netti Dynamic DUAL short leg support lengths suits
persons with lower leg length from circa 350 mm up
to approximately 500 mm (measured when knees
are 90° exed, from underneath the thigh to under
the heel – inclusive normal shoes).
Netti Dynamic DUAL normal leg support lengths
suits persons with longer than 500 mm lower legs.
See table and sizes on page 15 of this User Manual.

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3. DAILY USE
3.1 MOUNT THE LEG SUPPORTS
TO THE WHEELCHAIR. ENSURE AN
OPEN ANGLE OF THE LEG SUPPORT WHEN
INSERTING:
• Position the boltvertical into
the frame hole.
• Turn it ca 30 degrees outward
for it to enter easy.
• Turn it inward until it clicks
into user position.
With the footboard folded up, there is free
space for transfers.
The footboard folds down from the left and
is locked to the right side; this gives a sturdy
platform for the feet.
3.2 ANKLE HUGGERS
The footboard has holes prepared for ankle huggers
or shoe shells to be mounted as accessories.
Ankle huggers are useful when
involuntarily leg movements slide
the feet of the footboard.
Ankle huggers are mounted to the footboard by
threading the xing belts through the holes in
the footboard xing them with buckles on the
underside of the footboard.

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!
LOCK
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3.3 FOOTPLATE LOCK
With both leg supports in place, the footboard folds
down into the lock on the right leg support.
LOCK
The lock is closed by turning the outer ring
90 degrees forward!
The footboard lock MUST always be closed
when the chair is occupied.

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4.1 LEG SUPPORT HEIGHT
ADJUSTMENT
Measure the user’s lower leg length F – 90 degrees
bent knee – measure from underside thigh to
underside heel of shoe.
The centre joint of the leg support is hidden under
the knee-joint upholstery. The illustration with
removed upholstery shows the leg support knee-
joint centre. This shall be aligned both horizontally
and vertically with the knee-joint of the user by
adjusting both seat depth and footboard height.
NB! CORRECT SEAT DEPTH:
• Loosen the Velcro straps of the back support.
Check that the user is sitting well into the chair
leaning on the back cushion.
• Adjust the back support by pulling the straps of
the Velcro. The knees of the user should align with
the joint of the leg support both in height and in
depth. This will ensure that the user gets a back
good support and good pressure distribution
under the thighs.
• Leave 30 – 40 mm free space between the users
thigh and seat plate front.
The seat depth can be adjusted by:
moving the leg support extension pieces and
thereby increas the seat depth in the front and
by repositioning the chair-back hinges to adjust
the seat depth backwards. Consider wheelchair
balance.
See further information to seat depth adjustment in
the wheelchair user manual.
4. ADJUSTING THE NETTI DYNAMIC
LEG SUPPORT TO THE USER

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4.2 FOOTBOARD HEIGHT
ADJUSTMENT
• Loosen the M6 screws holding the leg
support length-prole on the outside with
5 mm Allen-key.
• Adjust the footboard to a height from
top of front edge seat cushion to the
footboard equal to the lower leg length – F
dimension.
Make sure there is enough free space
under the footboard for the
wheelchair to pass minor obstacles.
Slightly tilting the seating unit may
help.
If not sucient, the chair height must
be adjusted as described in the main user
manual for the wheelchair model.
5. CALF SUPPORTS
ADJUSTMENT
With both leg supports in correct height, the calf
supports must be adjusted:
5.1 CALF SUPPORT HEIGHT
ADJUSTMENT
• Loosen the two M6 screws with 5 mm Allen-key
– on the half-moon brackets – holding the
calf pad arm. This allows the calf support-
pad arm to move up and down.
The calf supports should in addition to
supporting the calf also help prevent
the feet sliding backwards from the
footboard.
• Choose a height covering the middle and
lower part of the user’s calf and tighten the
screws.
• Twist the calf pads to an angle giving
support for the leg when the foot
support is angled. The calf pads can
swing freely to follow the movements
and adjust to the user’s leg position.

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5.2 CALF SUPPORT DEPTH
ADJUSTMENT
• Loosen the M8 screw holding the calf
pad on the calf pad arm
• 2 pc 13 mm spanner and
• Slide the calf pad in or out to desired
depth – the calf pad barely touching the calf
while the feet are standing on the middle of the
foot board.
They should in addition to supporting the calf also
help prevent the feet sliding backwards from the
footboard.
5.3 LOCKING THE NETTI DYNAMIC
DUAL LEG SUPPORT
The red knobs allow locking the
dynamic elevation of the leg support
plate.
For the dynamic use of the Netti Dynamic
System (OK-C) this should be kept loose to
allow for the knee joint to move
(“OK-C movement” for the knee joint).
Locking the leg support may be required if
sudden extension maylead the leg supports
to hit persons or surrounding.
It is also required if the wheelchair is being
used as a seat in a car. .

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6. FOOTPLATE ANGLE
ADJUSTMENT
6.1 NETTI DYNAMIC DUAL
FOOTBOARD  ANGLE
ADJUSTMENT
• Loosen the M8 screw on the left foot board with
6 mm Allen key. This allows the footboard
to rotate.
Choose a footboard angle to
accommodate the user’s foot angle.
• Fix the screws tightly so that the
footboard does not move.
Please note that the DUAL footboard still
allow for some rotation forward to ex when
the user extends his / her feet.
Please note – lubrication of the gliding
length proles with white Vaseline is
important to ensure smooth function of the
Netti Dynamic System leg supports DUAL.

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7. NETTI DYNAMIC
LEG SUPPORTS
FOR DIFFERENT
LEG LENGTHS
7.1 ONESIDED FOOTBOARD
DEPTH ADJUSTMENT
By uneven leg length or leg position:
The leg support and footboard depth can be
adjusted to compensate for this by the use of
extensions pieces and extension bracket on
the right leg support.
The extension piece is pulled forward and
xed in needed length on the side where
the leg is longer.
The leg support sits in the extension piece
and is therefor also moved forward.
For the footboard to fall into the footboard
lock after one sided extension piece
adjustment, the footboard has to be
repositioned.
The footboard lock is removed from the
length prole where it normally sits – and
mounted to the extension bracket.
The extension bracket is mounted to the
length prole where the lock was sitting.

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• Fix the extension bracket with 2 M6 screws
with 5 mm Allen-key through the length
prole into 2 nuts.
• Fix the footboard lock with one M8
screw with 6 mm Allen-key.
The picture to the right shows the
bracket reaching forward, allowing
for longer left leg. The right leg support
and calf pad have to be moved backwards –
suiting a user with shorter right leg.
The picture to the right shows
the bracket reaching backwards,
allowing for longer right leg. The
right leg support and its calf pad
have to be moved forwards –
suiting a user with longer right leg.
All mounting illustrations
are showed for Netti Dynamic
PARALLEL.
The mounting procedure for
Netti Dynamic DUAL is similar.
Extension platform kit for DUAL
leg support: 82940 and 82941.

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8. CHAIR WIDTHS, HEIGHTS AND FABRIC FOR
NETTI DYNAMIC DUAL LEG SUPPORT:
CHAIR WIDTH
IN MM
LEG SUPPORT ADJ. R
3D FABRIC
LEG SUPPORT ADJ. L
3D FABRIC
FOOTBOARD *A
(HEIGHT 20 CM) CALF PAD ITEM NO.
350 82856 82857 82872 82862 82907
380 82856 82857 82873 82862 82908
400 82856 82857 82874 82863 82909
430 82856 82857 82875 82863 82910
450 82856 82857 82876 82864 82911
500 82856 82857 82877 82865 82912
CHAIR WIDTH
IN MM
LEG SUPPORT ADJ. R
3D FABRIC
LEG SUPPORT ADJ. L
3D FABRIC
FOOTBOARD *B
(HEIGHT 30 CM) CALF PAD ITEM NO.
350 82856 82857 82880 82862 82915
380 82856 82857 82881 82862 82916
400 82856 82857 82882 82863 82917
430 82856 82857 82883 82863 82918
450 82856 82857 82884 82864 82919
500 82856 82857 82885 82865 82920
CHAIR WIDTH
IN MM
LEG SUPPORT ADJ. R
EASY CARE FABRIC
LEG SUPPORT ADJ. L
EASY CARE FABRIC
FOOTBOARD *A
(HEIGHT 20 CM) CALF PAD ITEM NO.
350 82858 82859 82872 82862 82923
380 82858 82859 82873 82862 82924
400 82858 82859 82874 82863 82925
430 82858 82859 82875 82863 82926
450 82858 82859 82876 82864 82927
500 82858 82859 82877 82865 82928
CHAIR WIDTH
IN MM
LEG SUPPORT ADJ. R
EASY CARE FABRIC
LEG SUPPORT ADJ. L
EASY CARE FABRIC
FOOTBOARD *B
(HEIGHT 30 CM) CALF PAD ITEM NO.
350 82858 82859 82880 82862 82931
380 82858 82859 82881 82862 82932
400 82858 82859 82882 82863 82933
430 82858 82859 82883 82863 82934
450 82858 82859 82884 82864 82935
500 82858 82859 82885 82865 82936
For denition of correct footboard height, measure lower leg length with normal shoes and reduce
it with seat cushion thickness. If it is shorter than 450 mm choose footboard height 200 mm.
If it is longer than 450 mm choose footboard height 300 mm.
* AFootboard height 200 mm:
The distance between footboard and seat plate is minimum 300 mm up to 450 mm.
* BFootboard height 300 mm:
The distance between footboard and seat plate is minimum 450 mm up to 600 mm.
For wheelchairs with seat widths 500 mm and more the reinforced extension brackets for xing the
leg supports must be mounted.

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9. TRANSPORT
Wheelchairs with Netti Dynamic System Leg support
can be used as seat in a car if the wheelchair model
has been tested and approved to ISO 7176-19.
Please, follow the description for xing the chair
and the user as described in the User manual for the
wheelchair.
The Netti Dynamic leg support has to be
locked when the wheelchair is used as
a seat in a car.
10. MAINTENANCE
All wheelchairs equipped with Netti Dynamic
System will require special attention to maintenance
compared with wheelchairs without dynamic
system, due to the heavy and strong use.
Follow the wheelchair maintenance
description in the wheelchair User Manual
and pay special attention to tightening all
screws and inspecting all joints.
Inspect the belts and harnesses on tear and
wear. Replace if necessary.
NETTI DYNAMIC SYSTEM LEG SUPPORT 
LUBRICATION
Please note – lubrication of the gliding
length proles with white Vaseline – is
important to ensure smooth function of the
Netti Dynamic System leg supports. In some
cases sound can occur from the moving parts
if they are not regularly lubricated.

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11. TROUBLESHOOTING
Please study the recommendations in the User Manual
for the wheelchairs where the Netti Dynamic System
leg support is mounted – for instance:
Netti III HD (Netti Dynamic III HD)
Netti 4U CED (Netti Dynamic CED)
Netti BASE (Netti Dynamic BASE)
etc.
12. TESTS & WARRANTY
Netti Dynamic leg supports have been tested on
several dierent Netti wheelchairs - both crash
tests according to ISO 7176-19 and durability
tests according to manual wheelchair standard EN
12183.
Netti Dynamic leg supports are manufactured
following the Alu Rehab quality system according
to ISO 13485.
The guarantee claims stated in the User Manual
for the wheelchair also applies for wheelchairs
with Netti Dynamic System when the Netti
Dynamic System or parts are mounted and
adjusted for the user under supervision of a
Netti Dynamic System certied person.
Contact your local dealer if you have questions
regarding certied persons for Netti Dynamic
System.
Updated data about the wheelchair and the
Netti Dynamic System is found on
www.My-Netti.com

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Distributor
Alu Rehab ApS
Kløftehøj 8
DK-8680 Ry
Denmark
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Distributor
MDH Sp. zo.o.
ul. W. Tymienieckiego 22/24
90-349 tódz
Poland
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Norway
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Distributor
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Germany
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Manufacturer: