Otto Bock Empower 1A1-1 Instructions For Use Manual page 27

5 Preparation for use
CAUTION
Incorrect alignment, assembly or adjustment
Injuries due to incorrectly installed or adjusted as well as damaged prosthetic components
► Observe the alignment, assembly and adjustment instructions.
5.1 Alignment
INFORMATION
Preparations prior to alignment of the prosthetic foot
► Ensure that the prosthetic foot is switched off.
► Install the footshell on the prosthetic foot (see Page 37).
► Prior to bench alignment, verify that the prosthetic foot is in the neutral position and has not been moved to
plantar flexion.
5.1.1 Bench Alignment
TT bench alignment
Required materials: 662M4 goniometer, 743S12 heel height measuring apparatus, 743A80 50:50 gauge, alignment apparat­
us (e.g. 743L200 L.A.S.A.R. Assembly or 743A200 PROS.A. Assembly)
Perform the assembly and alignment of the prosthetic components in the alignment apparatus according to the following spe­
cifications:
Sagittal plane
Heel height: Effective heel height (shoe heel height - sole thickness of forefoot) + 5 mm
Exterior foot rotation: approx. 5°
Anterior placement, middle of the prosthetic foot to the alignment reference line: 30 mm
Connect the prosthetic foot and prosthetic socket using the chosen adapters. The instructions for use of the
adapters must be observed.
Determine the centre of the prosthetic socket with the 50:50 gauge. Align the prosthetic socket centrally to the
alignment reference line.
Socket flexion: Individual residual limb flexion + 5°
Frontal plane
Alignment reference line of prosthetic foot: between big toe and second toe
Alignment reference line of prosthetic socket: along the lateral patella edge
Observe the abduction or adduction position.
TF bench alignment
► Observe the information in the prosthetic knee joint instructions for use.
5.1.2 Static Alignment
• Ottobock recommends checking the alignment of the prosthesis using the L.A.S.A.R. Posture and adapting it
as needed.
If necessary, the alignment recommendations (TF modular leg prostheses: 646F219*, TT modular leg pros­
•
theses: 646F336*) may be requested from Ottobock.
5.1.3 Dynamic Trial Fitting
• Adapt the alignment of the prosthesis in the frontal plane and the sagittal plane (e.g. by making angle or slide
adjustments) to ensure an optimum gait pattern.
TT fittings:Make sure that physiological knee movement in the sagittal and frontal plane is achieved when the
•
leg begins to bear weight after the heel strike. Avoid medial movement of the knee joint. If the knee joint moves
in the medial direction in the first half of the stance phase, move the prosthetic foot in the medial direction. If
the medial movement occurs in the second half of the stance phase, reduce the exterior rotation of the prosthet­
ic foot.
• Check walking with the prosthetic foot turned off. The prosthetic foot has to permit dampened motion. If the
heel strike is too soft, a heel wedge can be inserted.
5.1.3.1 Optimising the heel characteristics
Two heel wedges are available (red=soft, blue=hard). Ottobock recommends starting with the red heel wedge.
Empower 1A1-1
Bench alignment process
Preparation for use
27