Part No 1039470
5
Adjustable Tension Back Upholstery
When
using
adjustable
upholstery,
it
is
possible
to
tighten
the
lower
portion
of
the
backrest
which
assists
in
maintaining
a
neutral
pelvis.
The
upper
portion
can
then
be
adjusted
to
follow
the
natural
curvature
of
the
spine
bringing
the
trunk
back
over
the
pelvis
in
a
position
of
balance
relative
to
the
center
of
gravity
(Detail
“A”
‐
FIGURE 4).
The
best
point
of
control
for
the
pelvis
is
near
the
Posterior
Superior
Iliac
Spine
(P.S.I.S).
The
upper
trunk
should
be
relined
until
a
balance
posture
is
achieved,
approximately
10
to
15
degrees
(Detail
“B”
‐
FIGURE 4).
For
individuals
who
have
fixed
kyphotic
spine,
the
backrest
can
be
adjusted
to
allow
for
an
increased
recline
while
providing
increased
contact
and
support
of
the
back
(Detail
“C”
‐
FIGURE 4).
The
height
of
the
backrest
and
the
amount
of
control
provided
by
the
adjustable
tension
upholstery
will
vary
depending
on
the
abilities
of
the
user.
An
active
paraplegic
(SCI)
may
require
a
minimal
back
height
which
adds
posterior
stability
to
the
pelvis
and
lets
the
trunk
assume
a
natural
balance
over
the
top
edge
of
the
wheelchair
upholstery.
A
less
active
para
(with
a
high
level
of
injury)
or
a
quadriplegic
may
require
a
higher
backrest
with
an
increased
level
of
recline
(Detail
“D”
‐
FIGURE 4).
The
effect
of
back
support
and
the
angle
of
the
backrest
are
interconnected.
Changes
to
one
often
requires
change
to
the
other
if
optimal
support
and
balance
are
to
be
achieved.
Use
of
a
wheelchair
with
adjustable
tension
upholstery
can
significantly
increase
function,
postural
control,
balance
and
comfort.
FIGURE 4
DETAIL “A”
DETAIL “B”
DETAIL “C”
DETAIL “D”
10-15°
Angle
P.S.I.S.
Adjust Backrest to
conform to Fixed
Kyphotic
Deformity
Open seat to
back angle, if
possible
Para
Quad
