Fillauer MotionFoot MX User manual

MotionFoot®MX
Prosthetist Manual

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MotionFoot®MX
Prosthetist Manual
Introduction
The MotionFoot®MX is a hydraulic ankle with carbon ber foot system that provides a full 50 degrees
range of motion (ROM). Plantar exion and dorsi exion resistance are independently adjustable by the
prosthetist or the patient. Dynamic response of the toe lever arm progressively increases during the gait
cycle due to the unique, moving fulcrum design acting on the main spring element of the foot.
Foot Components
Patient Selection
Available sizes: 22-30 cm
Weight limit: 220 lbs (100 kg)
Functional patient category: K2-K4
Build height: 3-11/16 inches (9.4 cm) for 22 cm foot, to 4 inches (10.15 cm) for 30 cm foot
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Adjusting the Side Plates
When adjusting the Side Plates, the Clevis should be in a position so that the “STOP!” warning is not
visible on the foot. Otherwise the Clevis will hit the housing, causing damage to the Ankle Housing,
Clevis, Side Plates, and Splined Shaft. This adjustment should be made by a qualied practitioner.
Adjusting the Heel Height/Dorsi Flexion angle
Ensure the Clevis is not in contact with the Ankle Housing at either full dorsi exion or full plantar
exion.
Ankle Lock set screws
Do not make any adjustments to the small set screws on the anterior side of the Lock/Unlock
button. This may result in a malfunction of the locking mechanism.
Ankle Lock
Do not use the Ankle Lock mechanism for walking or running. It should be used for driving,
donning/dong shoes, and other light, non-ambulatory activities.
Driving
The foot should be in the locked position whenever being used for driving.
Kneeling and sitting
The foot will go into plantar exion when sitting and kneeling. Upon standing, care must be taken
to return the foot to a neutral position to prevent knee hyperextension or tripping on the plantar-
exed foot.
Stairs/Ladders
Care must be taken while climbing stairs and ladders so the weight line remains anterior to the
center of rotation of the ankle, to prevent the foot from going into plantar exion when ascending
or decending stairs, ladders, etc. This must be explained to the patient.
Declines
When switching direction on a descent, the foot must return to a neutral position before level or
uphill ambulation.
Dust, Dirt, and Water
Prevent dust, dirt and water from entering the foot shell. Always keep a Spectra Sock between the
foot shell and the foot. If the inside of the foot shell becomes contaminated, remove the foot shell,
thoroughly clean the foot and inside of the shell, and replace the Spectra Sock if necessary.
Special Precautions
MotionFoot®MX Set-Up
From the factory, the MotionFoot®MX is set for a 3/8 inch heel, allowing 7 degrees of dorsi exion and 43
degrees of plantar exion. This can be changed by the heel height adjustment.
Since the MotionFoot®MX has 50 degrees ROM, this range can be shared between dorsi exion and
plantar exion. This is done in 5 or 10 degree increments by changes to the side plates. Fine adjustment
is accomplished by pyramid adjustment. Many patients prefer the dorsi exion stop to be at 90 degrees
much like the foot they previously wore. Others prefer 5-10 degrees of dorsi exion for toe clearance
during swing phase.
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Removing the Side Plate
1. Place the ankle in full dorsi exion.
2. Loosen the pinch bolt on the Clevis of both Side
Plates.
3. Screw the Shoulder Bolt of the Side Plate
Removal Tool (part # 3020020, included with
each foot) into the Side Plate Removal Hole.
4. Key the pointed end of the Side Plate Removal
Screw into the Splined Shaft.
5. Gently turn the Side Plate Removal Screw
clockwise and the Side Plate will slide o.
6. Remove the Side Plate Removal Tool.
Adjusting the Heel Height/Dorsi exion angle
1. With the foot in the shoe (or approximating the
heel height) place the Clevis at the point you
would like full dorsi exion.
a. If you would like the dorsi exion stop at
0 degrees, place the pyramid parallel to
the oor.
b. If you would like 10 degrees of dorsi
exion, place the pyramid leaning anterior
at 10 degrees.
2. Install one side plate; if the angle changes excessively (>5 degrees) reverse the Side Plate.
a. Note that the Side Plate is marked one side A, the other side B.
b. 10 degree adjustments can be made by leaving each Side Plate as it is.
c. 5 degree adjustments can be made by reversing both Side Plates.
d. One Side Plate will always say A, the other B; you cannot have A-A or B-B combination.
3. Install the opposite Side Plate.
a. Gentle tapping with a plastic head hammer may be required.
b. If the splines do not engage, check to make sure the plates are in an A-B conguration.
5. With both Side Plates ush with the Clevis, tighten the Pinch Bolt to 60 lb-in (6.8 N.m).
6. Check the dorsi/plantar exion range-of-motion.
Multiple Heel Height Shoes
• If your patient plans to wear multiple heel height shoes, perform the above exercise with the lowest
heel height shoe
• When your patient moves to a higher heel height, note that the dorsi exion stop has now changed
• This also results in a decrease in plantar exion range
Bench Alignment
Bench alignment should be performed with the foot shell installed, and the shoe on if possible. If the
shoe is not available, approximate the heel height of the shoe.
To Change Heel Height/Dorsi Flexion range
Factory Setting
The MotionFoot®MX is set for 7 degrees of free dorsi exion in a shoe with a 3/8 inch heel. This is marked
at “0” on the Ankle Housing. Small adjustments (< 5 degrees) are made at the adjustment pyramid. When
Side Plate adjustments are made, the zero reference mark is no longer valid.
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Trans-femoral
• Set up initial socket exion and TKA (Trochanter, Knee, Ankle) to standard
prosthetic principles
• A sagittal plumb line should drop from knee center (not center of rotation of
polycentric knees) through the ankle joint
Trans-tibial
• Set up initial socket exion according to standard prosthetic principles
• A sagittal plumb line should bisect the socket and pass though the center of
rotation of the ankle
Dynamic Alignment
Have the patient ambulate safely. All prosthetic principles for dynamic alignment
remain the same.
1. Begin with the Dorsi Flexion and Plantar Flexion Resistance Adjustment Screws
set at 1.
2. Increase the planter exion resistance level to decrease or eliminate foot slap. Increasing planter
exion resistance too much and the transition from initial contact to loading response will feel sti to
the patient and could make the knee less stable.
3. Increase the dorsi exion resistance to provide smooth transition though mid-stance. Increasing dorsi
exion resistance too much will result in excessive hyperextension forces on the knee.
Ankle Lock
The Ankle Lock is a feature to be used for driving, donning and dong shoes and socks.
• To lock the ankle, push the lock button on the right side of the ankle
• The ankle will dorsi ex to its maximum dorsi exion angle, then lock
• To unlock the ankle, push the lock button on the left side of the ankle
Foot shell Installation and removal
Foot shell Installation
1. Place a Spectra Sock over the MotionFoot®MX system assembly.
2. Lock the ankle mechanism.
3. Press the toe plate into the foot shell as far as possible.
4. Place the foot shell tool into the posterior aspect of the foot shell completely.
5. Press the MotionFoot®MX system rmly into the foot shell until the posterior part of the foot plate is
securely positioned under the retaining lip in the foot shell.
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Foot shell Removal
1. Insert the foot shell tool in the posterior corner of the foot shell to pry the retaining wedge o of the
foot plate.
2. Remove MotionFoot®MX from the foot shell.
Suggested LCodes
Code Description
L5968 Multiaxial Ankle w/swing phase dorsiexion
L5981 Flex-Walk System, or equal
L5990 User Adjustable Heel Height
L5999* Manual Lock, Ankle
L5999* Natural Ankle Range-of-Motion
*Contact Motion Control for MSRP regarding L5999 codes
Limited Warranty
The MotionFoot®MX is provided with a 2 year warranty, with the exception of the foot shell, which
has a 6-month warranty. After the warranty period, repairs are guaranteed for a period of 90 days.
Determination of the damages or defects to be covered under the Limited Warranty shall be made by
Motion Control personnel.
Warranty does not include:
1. Prosthetic services for tting and maintaining the prosthesis.
2. Damage caused by neglect, misuse or improper operation.
3. Damage due to accident, re, water, vandalism, unsuitable environmental conditions.
4. Replacement parts not approved or recommended by Motion Control.
5. Modications to the equipment which occur during the period of the Agreement except by mutual
consent of the parties in writing, including payment of additional charges as specied by the Seller.
Return Policy
Returns are accepted for a full refund (not including any repairs that may be required, including
replacement of the foot shell to return the foot to new condition) for 60 days from date of shipment.
Returns 61-90 days from date of shipment will be accepted, subject to a 15% restocking fee. This does not
include any repair costs, including replacement of the foot shell to return the foot to new condition.
Beyond 90 days, returns are not accepted.
Ordering Information
Locate on the selection chart the patient’s weight and foot size. A High Activity (HA) patient may require a higher
weight range for increased stiness.
Weight 22 cm 23 cm 24 cm 25 cm 26 cm 27 cm 28 cm 29 cm 30 cm
100-130 lbs 45-59 kg 5020020 5020022 5020024 5020026 5020030 -- -- -- --
131-161 lbs 59-73 kg 5020020 5020022 5020024 5020026 5020030 5020034 5020038 -- --
162-192 lbs 73-87 kg 5020021 5020023 5020025 5020027 5020031 5020035 5020039 5020042 5020046
193-220 lbs 87-100 kg 5020021 5020023 5020025 5020028 5020032 5020036 5020040 5020043 5020047
193-220 lbs HA 87-100 kg HA -- -- -- 5020029 5020033 5020037 5020041 5020044 5020048
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© 2020 Motion Control, Inc. 1910046 Rev H 09-28-2020
Motion Control, Inc.
115 N Wright Brothers Drive
Salt Lake City, UT 84116
801.326.3434
Fax [phone]
www.llauer.com