Static Alignment; Dynamic Alignment - Blatchford Blade XT Instrucciones De Uso

3 Alignment
10 mm
Ensure the top surface of the blade is
horizontal to allow for compression in
the main Toe spring when loaded with
the user's body weight.
Build
Line
Alignment
Indicator
horizontal
wedge
(optional)

Static alignment

Trans-femoral alignment
Align trans-femoral components according to fitting
instructions supplied with the knee. Keep the build
line relative to this device as shown.
Setup length
This device should be set up with a 10 mm heel
wedge so that its top surface is horizontal. The
length of this device should be 10–15 mm longer
than the user's everyday prosthesis with running
trainer footwear to allow for spring compression.
Build line
The build line should fall in the middle of the slot
on top of this device. This is defined by a vertical
alignment indicator line on each side.

Dynamic alignment

Coronal plane
Ensure that M-L thrust is minimal by adjusting
relative positions of socket and foot.
Sagittal plane
On standing the toe should deflect so that the heel
is in contact with the ground. On walking check for a
smooth transition from heel strike to toe-off.
1 Optimise plantar flexion and dorsiflexion
On running, a heel strike should always be present
but this can be very small and subtle. To optimise
running gait, plantarflex the foot incrementally
in small amounts at a time ensuring a heel strike
is maintained. If the foot is too plantarflexed the
sole will 'slap' against the ground. To prevent 'slap'
dorsiflex the foot.
2 Stiffness and A–P shift
When an optimal plantar flexion/ dorsiflexion angle
has been achieved , if when running the toe feels
too soft, then shift the weight line posteriorly on the
foot. If the toe feels too stiff, then shift the weight
line anteriorly on the foot.
3 If the user is sinking at heel strike the heel is too
soft. Fitting the wedge supplied will have the effect
of stiffening the heel spring, this can be taped in
place for trial (see diagram). For permanent fitting
the wedge should be glued in place by application
of Loctite 424 (926104) on the upper surface of the
wedge.
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