Table of Contents
Advertisement
Tips and tricks
Topic: Residual limb
Problem
Cramp
ing/aching/throbbing
while standing or sit
ting
Topic: Liner
Problem
Liner tears
Topic: Flow properties of the liner
Problem
Flow
properties
of
the liner not correct
Topic: Noise
Problem
Air
rippling/burping
between the skin and
liner
Hissing noises on the
vacuum pump
28 | Ottobock
Cause
Inadequate blood flow to the
residual limb.
Cause
Incorrect
prosthetic
(specific weight bearing sock
et or prosthetic socket with
relief structures)
Polyurethane causes irritation in
the presence of large pressure
differences. This can occur if the
liner is exposed to selective
strain.
Prosthesis is used without
vacuum.
The volume loss causes the
residual limb to slip into the
prosthetic socket, where it can
damage the liner.
User does not compensate for
volume loss.
Cause
-
-
Cause
Air under the liner
No
tailored
spot
entrance that does not close.
Liner or sealing sleeve too
loose on the thigh.
Muffler on the expulsion valve
of the pump removed.
In the delivery condition, a
muffler is located in the outlet
hose of the vacuum pump.
Set screws on the pyramid
adapter are not tightened uni
formly.
Solution
•
Go through the "Pressure in the proximal area" sec
tion of this table to rule out squeezing in the proxim
al area.
•
If the prosthetic socket has the correct fit: Consult
the attending physician to rule out ischaemia, for
example.
Solution
socket
•
Make a new prosthetic socket according to the
instructions of this document.
•
Ensure that the vacuum is generated and main
tained. Without vacuum, the user loses residual limb
volume every day.
•
Instruct the user on how he or she can determine
whether there is vacuum and how to restore the
vacuum in the event of loss.
•
Explain to the user how he or she can recognise
volume losses from the markings on the liner and
compensate for them using the liner FitKit.
Solution
•
Work through the "Checking the volume" section
(see Page 13).
Solution
•
Explain to the user how to properly remove all air
from the liner when putting it on.
for
an
•
Have a custom spot made for all entrances that do
not close when you cup the limb with your hand.
When using a PU standard liner: Ensure that the
•
liner is seated correctly along the entire residual
limb and the thigh.
•
Use a PU custom liner to ensure a correct fit.
•
Attach a 4Y360=5 muffler to the outlet opening of
the vacuum pump.
•
Loosen all set screws and retighten them (torque
according to the corresponding instructions for
use).
Harmony System
Hide quick links:
Advertisement
Table of Contents
