Otto Bock 452A1 Series Instructions For Use Manual page 10

NOTICE
Damage to the ProSeal ring and loss of functionality when using
alcohol for cleaning. Please only use PH-neutral soap.
INFORMATION
To ensure proper function and seating, we recommend replacing the
ProSeal ring when the liner is checked and no later than after one year.
Contact your orthopaedic technician if necessary.
3 Handling
3.1 Reducing the plaster positive
1. We recommend taking the plaster cast over the liner. The socket should
be an ischial containment one. Reduce the circumference of the resulting
plaster positive at the proximal 5 cm (measured from the perineum) by 1
cm. Do not reduce the rest of the plaster positive. The reduction refers
to the circumferences measured on the residual limb with the liner on.
(See Fig. 2.)
• Pay heed to soft, round shaping when reducing.
3.2 Size selection
- on the basis of the plaster positive
1. To determine the required ring, measure the circumference 30 – 50 mm
below the perineum on the plaster positive (see Fig. 3).
• The rings may be inserted slightly askew to the longitudinal axis of the
socket (see Fig. 3). The ring should be at least 30 – 50 mm below the
socket brim (perineum region).
• The rings are available in size steps of 2 cm (sizes: 320, 340, 360, 380,
400, 420, 440, 460, 480, 500, 520, 540, 560, 580, 600, 640). Use the
next larger size for measurements between the available ring sizes.
3.3 Socket design
1. Position the Lamination dummy on the plaster positive so that the Δ
marking is pointing toward the distal end.
• The dummy must be perfectly positioned along the entire surface of the
plaster positive.
10 | Ottobock