Otto Bock 3R20 Instructions For Use Manual page 17

► Use the rotation to the left shown in
patient has difficulty initiating the flexion. Note that this reduces
the stability of the prosthetic joint.
7.3 Optimising the static alignment
► Check and optimise static alignment on standing patient (see
5
Fig. on page 4).
► If a measuring device for representing load lines is available,
check the distances indicated in Figure
the prosthesis alignment as necessary.
7.4 Optimising during dynamic trial fitting
CAUTION
Adjusting the Settings
Fall due to incorrect or unfamiliar settings
► Only adapt the settings to the patient gradually.
► Explain the effects of the adjustments on the use of the prosthes­
is to the patient.
► If the patient has difficulty initiating the flexion, turn the adjustable
extension stop to the left as shown in Figure
Adjusting the extension assist
► For adjusting the extension assist, note Figure
6
: Increasing the spring tension,
► CAUTION! The lower leg of the prosthesis must not swing
through too far in the dorsal direction at the beginning of the
swing phase.
Adjust the extension assist so that the lower leg of the prosthesis
swings through in the dorsal direction according to the patient's
requirements, but reaches full extension in a timely manner for the
next heel strike.
Adjusting the swing phase friction
► For adjusting the swing phase friction, note Figure
7
: Increasing the axle friction,
for dynamic fitting if the
5
on page 4 and correct
4
on page 4 in
6
on page 5.
Reducing the spring tension
7
on page 5.
Reducing the axle friction
► CAUTION! The prosthetic knee joint has to reach full extension,
even at slower walking speeds. Observe the information under
the heading "Fine-tuning the settings".
► Adjust the swing phase friction so that the prosthetic knee joint
does not swing too hard against the extension stop and so that
the prosthetic foot swings through sufficiently according to the
needs of the patient.
Fine-tuning the settings
► CAUTION! The various settings of the prosthetic knee joint can­
not be adjusted entirely independently of each other. When the
settings cannot be fully adjusted to the comfort needs of the
patient, the settings should be established primarily based on
safety aspects.
► Adapt the settings of the prosthetic knee joint to the patient by
means of fine-tuning and exercises.
► If the extension position is not reached with every step and at any
walking speed, reduce the braking effect and/or increase the ini­
tial tension of the extension assist.
► Check the adjustment of the prosthesis settings during normal
.
consultations and the annual safety inspection.
Advise the patient to check the prosthesis if changes in function
occur.
7.5 Attaching the cosmetic cover
CAUTION
Use of talcum
Risk of injury, damage to the product due to lack of lubrication
► Do not use talcum on the product or other prosthesis compon­
ents.
► After affixing the cosmetic elements, verify proper functioning of
the prosthesis.
► To reduce friction and to eliminate noise, apply silicone spray dir­
ectly onto the contact surfaces of the cosmetic foam cover.
17