Otto Bock Harmony P3 Technical Information page 29

Topic: Vacuum
Problem
Vacuum is only gen­
erated distal to the
prosthetic socket.
(The sealing sleeve is
not pulled over the
edge of the prosthet­
ic socket.)
Vacuum is generated
in the prosthetic
socket but decreases
again.
Harmony System
Cause
Outlet opening of the pros­
thetic socket covered with
adhesive tape.
Outlet opening of the pros­
thetic socket blocked with
spot.
Socket connector
clogged.
User wears liner with textile
cover.
The textile cover prevents the
seal between the liner and seal­
ing sleeve. This causes air to
penetrate into the prosthetic
socket.
Residual limb sock reaches at
least to the upper edge of the
liner.
This has the same effect as
wearing a liner with a textile cov­
er.
No lubricant in the proximal
area of the liner.
This allows air to leak along the
thigh and the non-stick surface
of the liner.
Sealing sleeve does not form
a tight seal with the prosthetic
socket.
This allows air to penetrate at the
transition between the prosthetic
socket and the sealing sleeve.
Laminate not completely sat­
urated with resin.
Air can get through the layers of
the laminate and into the pros­
thetic socket. This
occurs on the outlet opening of
the prosthetic socket.
Solution
• Remove the adhesive tape.
• Instruct the user to always wear spots or residual
limb socks under the thin residual limb sock.
or filter
• Disconnect the hose from the intake valve of the
vacuum pump. Blow air through the hose to dis­
lodge the clog.
If the clog remains: Replace the socket attachment
•
piece.
Only use liners that do not have a textile cover in the
•
proximal area.
• Instruct the user to pull the residual limb sock up to
only about 5 cm below the edge of the liner. This
allows the seal between the liner and sealing sleeve.
• Apply a thin layer of lubricant to seal the area.
• Roll the lower end of the sealing sleeve upwards
from the prosthetic socket. Ensure that at least 5 cm
of the prosthetic socket is designed so that the seal­
ing sleeve can form a tight seal.
• Apply a thin layer of lubricant to seal the area.
• Roll the sealing sleeve onto the prosthetic socket
and use a hook-and-loop strip or electrical tape to
ensure that it is seated tightly against the prosthetic
socket.
• Remove the socket connector.
• Drill a larger hole.
• Seal the hole with epoxy resin.
• Drill a hole for the socket connector in the middle of
generally
the epoxy resin.
• Attach the socket connector.
If the system still leaks: Make a new prosthetic
•
socket according to the instructions of this docu­
ment.
Tips and tricks
Ottobock | 29