Alignment; Static Alignment; Dynamic Alignment - Blatchford Blade BXTAG1SF-BXTAG9SF Instructions D'utilisation

4 Alignment

The instructions in this section are for practitioner use only.
4.1

Static Alignment

Transfemoral 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.
1/2
1/2 1/2
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.
Trochanter
1/2
Build
Line
Alignment
Indicator
horizontal
wedge
(optional)
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.
4.2

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. Optimize plantar flexion and dorsiflexion
On running, a heel strike should always be present but
this can be very small and subtle. To optimize 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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