Össur VARI-FLEX VFXE Series, Instructions For Use Manual

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5 PB
ENGLISH
VARI-FLEX
®
FOOT SYSTEM (Figure 1)
• Minimal Clearance 152mm-164mm (6"– 6-1/2")
• Maximum weight 166 kg (365 lbs)
• Available in sizes 22-30 cm
BENCH ALIGNMENT (Figure 2)
• Fit foot with selected cover.
• Adjust to appropriate heel height (using the shoe).
• Introduce appropriate socket angles flexion/ extension and
abduction/adduction.
• Divide the foot cover into 3 equal portions.
• The load line should fall at the junction of the posterior and the
middle third portions as shown in (Figure 2) .
• The 1/3 position is marked on the inside wall of the foot cover
DYNAMIC ALIGNMENT
The heel stores energy after initial contact, slowly releasing it at
midstance. The forward momentum generated by this action results in
the toe being loaded for optimum energy release at terminal stance. The
heel to toe action can be influenced by:
• A-P positioning of foot
• Dorsi-Plantarflexion
• Heel Stiffness
CATEGORY SELECTION CHART
Please refer to the selection charts below to determine the appropriate
stiffness required according to Össur recommendations.
HEEL STIFFNESS
Heel too soft
Symptoms
• Foot will come to flat position too early (amputee feels he/she is
sinking into a hole).
• Extra energy is required to climb up over the toe.
• Toe will feel too stiff.
• Knee may hyperextend.
Actions
• Add polyurethane heel wedge.
• Shift socket anterior (anterior or foot posterior).
Heel too hard
Symptoms
• Rapid heel to toe movement.
• At initial contact the amputee has poor control of his prosthesis.
WEIGHT KG 45-52 53-59 60-68 69-77 78-88 89-100 101-116 117-130 131-147 148-166
WEIGHT LBS 99-115 116-130 131-150 151-170 171-194 195-220 221-256 257-287 288-324 325-365
Low Impact Level 1 1 2 3 4 5 6 7 8 9
Moderate
Impact Level
1 2 3 4 5 6 7 8 9
Special
Order
High Impact Level 2 3 4 5 6 7 8 9
Special
Order
Special
Order