Static Alignment; Dynamic Alignment - Össur TOTAL KNEE JUNIOR Instrucciones Para El Uso

STATIC ALIGNMENT

For safety, please make initial adjustments with patient standing between
parallel bars!
• Fit prosthesis and check for correct length.
• Make sure foot is flat on the floor, knee is in neutral position and
socket angles are correct.
• When the patient shifts weight onto the prosthesis, the geometric
lock is activated and the bumper should be slightly compressed.
Modify alignment if necessary.
• Explain function of stance flexion/geometric lock to patient. Ask
patient to activate it by stepping forward with prosthesis and
transferring weight onto heel.
• Patient should become accustomed to activating geometric lock and
resulting stance flexion movement.
• Knee cannot collapse as long as geometric lock is activated.

DYNAMIC ALIGNMENT

Swing Control Adjustments
The pediatric Total Knee is designed to operate with free extension
resistance to provide the quick response required by most children.
Therefore, swing phase adjustments are completed through use of the
extension promoter and extension assist.
Bumper adjustment
• Try different bumpers and select the most comfortable one.
• Final bumper selection may vary from bumper indicated for patient's
weight according to table.
• Soft bumpers increase the locking moment of the Geometric Lock
and increase stance flexion motion.
• Hard bumpers decrease the locking moment of the Geometric Lock
and decrease stance flexion motion.
• Foot selection influences bumper selection.
a. For soft heels, choose a softer bumper.
b. For hard heels, choose a hard bumper.
Shim adjustment (Figure 7)
Adding shims changes the release point of the Geometric Lock allowing
for swing phase knee flexion. This affects knee stability and ease of
walking and sitting. The shims are thin plastic plates which are installed
underneath the bumper to adjust its height. A change in height affects
the knee's release point.
• More shims: easier release into swing flexion and decreased stance
flexion
• Less or no shims: increased safety, increased stance flexion and
delayed release into swing flexion
NOTE: There are two different types of shim. The thicker ones are
0.76mm thick and clear, the thinner ones are 0.38mm thick and grey. We
do not recommend using more shims than those two combined. Adding
more shims can eliminate the Geometric Lock and affect stability of the
knee during stance.
Gradually increase shim thickness until the user feels premature release
of the knee. Reduce shims until the user finds a balance between security
and release point. Please make initial adjustments inside parallel bars.
7