FS3 Defender™ | 7
Instructions for Use (R-720-062, Rev. H) English EU
Defender™Instructions for Use
Product Number: FS3
Assembly The Defender™ foot module is pre-assembled consisting of a graphite component (keel),
Spectra™ sock, and foot shell. Foam stiffening bumpers for increasing heel stiffness are
provided. After dynamic alignment, torque pyramid adjustment screws to the
manufacturer’s specifications. Secure pyramid adjustment screws with a thread locking
adhesive (i.e., Loctite 242).
Bench Alignment Prior to donning the prosthesis:
•Plantarflex/Dorsiflexion foot to match the shoe heel height.
•Adduct/Abduct socket to provide appropriate frontal plane angle.
•Flex/Extend socket to provide appropriate sagittal plane angle.
•Move the socket linearly to ensure the weight line falls along the anterior edge of the
pylon (see illustration).
Dynamic Alignment During loading response, the heel lever stores energy and releases it during midstance.
This action provides momentum for the keel to store energy and release it during terminal
stance. To optimize the heel to toe rollover motion, adjust the following variables:
•Anterior/posterior foot placement
•Dorsiflexion/plantarflexion
•Heel stiffness
Troubleshooting Heel too soft Symptoms
•Foot flat occurs too rapidly
•Toe feels excessively stiff
•Knee hyperextension
Solutions
•Shift socket anteriorly in relation to the foot
•Attach foam stiffening bumpers
Heel too hard Symptoms
•Rapid knee flexion, instability
•Heel to toe progression to rapid
•Lack of energy return sensation
Solutions
•Shift socket posteriorly in relation to the foot
•Verify appropriate foot module category
Foot module too stiff Symptoms
•Flat spot in rollover motion at slow cadences
Solutions
•Consider a lower category foot module
Foot module too soft Symptoms
•Clicking noise at initial contact
•Excessive toe deflection with high impact activity
Solutions
•Consider a higher category foot module
Instructions for Use (R-720-062, Rev. H) English EU
Stiffening Bumpers Foam stiffening bumpers are included to adjust the heel stiffness during loading
response. The bumpers may be temporarily attached with tape between the heel lever
and keel. If the bumpers provide excessive heel stiffness, exclude or trim as appropriate.
For permanent placement, adhere bumpers using Barge or similar contact cement.
Spectra™ Sock A Spectra™ sock is provided to protect the foot shell and minimize noise. Spectra™
socks must be replaced at intervals appropriate to the user’s activity level. Failure to
inspect and replace the Spectra™ socks may prematurely wear the foot module, and will
void the warranty.
Foot Shell When removing or installing the foot shell, use the Foot Shell Removal Tool (ACC-00-
10300-00) to prevent damage to the foot module.
Defender™ Minimum clearance: 61mm-76mm
Maintenance
Maximum user weight: 45 kg (100 lbs)
Available sizes: 16cm-21cm
Heel height: 10mm
The foot module requires periodic maintenance.
•Inspect the foot module every six months. If the user is more active, more frequent
inspection may necessary. Service as necessary. Replace Spectra™ sock and/or foot
shell if worn to prevent damage to the graphite components.
•The foot module may be cleaned and/or disinfected with soap and warm water. If the
foot is exposed to water, remove the foot shell to clean and disinfect its interior.
Warnings Failure to adhere to the guidelines of the Instructions for Use will void the warranty.
•Never use the foot module without a foot shell. Failure to comply may cause
premature wear, loss of function, and/or product failure.
•Always use the foot module with a sock and shoe. Failure to comply may cause
premature wear, loss of function, and/or product failure.
•Do not allow aggregates such as sand to remain in the foot shell. Upon exposure to
aggregates, immediately disassemble foot module and rinse with water. The abrasive
properties of aggregates will quickly wear the graphite components of the foot module.
•Freedom Innovations foot modules are manufactured to fit industry standard pyramids
and receivers. It is the prosthetist’s responsibility to select and/or fabricate properly
fitting attachment components.
•Never attempt to loosen the bolt affixing the pyramid connector.
•Discontinue use and consult your prosthetist if any part of the prosthesis starts to make
noise.
•Inform your prosthetist if you lose or gain a significant amount of weight.
•Freedom Innovations foot products are manufactured and tested for a particular weight
and activity impact level. Use by another user for whom it was not originally
manufactured may cause injury and shall void any written or implied warranty.
lnstructions for use
Heel Bumper To temporarily place foam bumpers, use two-sided tape (included), and secure foam to the
top of the sole plate. To avoid having the foam slap into the keel at toe-o, we recommend
trimming the foam to provide a 2mm gap between the foam and keel. For permanent pla-
cement, we recommend the use of Barge Cement.
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