Invacare Adjustable Back Upholstery User Manual
Adjustable Back Upholstery
Assembly, Installation and Operating Instructions
SAVE THESE INSTRUCTIONS
NOTE: Check all parts for shipping damage. In case of
damage, DO NOT use. Contact Carrier/Invacare for further instructions.
SAFETY SUMMARY
The following recommendations are made for the
safe and proper installation and use of the Oxygen
Holder:
GENERAL WARNINGS
DO NOT install this equipment without first reading and understanding this instruction sheet. If you
are unable to understand the W arnings, Cautions
and Instructions, contact a healthcare professional, dealer or technical personnel if applicable,
before attempting to install this equipment - otherwise, injury or damage may occur.
INST ALLATION WARNINGS
After ANY adjustments, repair or service and BEFORE use, make sure that all attaching hardware
is tightened securely.
USER WARNINGS
After the adjustable back upholstery has been
positioned to the end user’s individual needs, the
hook and loop fasteners straps MUST be securely
fastened before applying the back upholstery
cover . The adjustable back should be checked
whenever entering the chair to ensure that the
hook and loop fasteners are securely fastened.
Y our therapist and physician should be consulted
if you have any questions regarding individual
limitations and needs.
As the needs of the individual become more complex, the evaluation becomes more important.
ADJUSTABLE BACK UPHOLSTERY
The adjustable back upholstery is a new feature. It is a
positioning device with numerous applications.
THE ADJUSTABLE TENSION
STRAPS.
The straps can be adjusted to various levels of tension to
accommodate individual end users. In a typical scenario,
the bottom two (2) straps can be adjusted tightly to support and/or assist the extensor muscles.
The top two (2) straps would be left looser to allow the
upper body to lean back over the upholstery to fight gravity. This configuration may enable the back canes to be
lowered for a quad. In another instance, you might loosen
all of the straps and allow the end user to sink all the way
back into the chair. Every person will be different. Let the
therapist experiment with different positions and then
decide. It is easy to change.
THE BACK UPHOLSTERY COVER
(FIGURE 1)
The back upholstery cover is designed for three (3) reasons:
The first is as a modesty cover to prevent one’s posterior
from protruding out of the chair.
The second is to keep the cushion from sliding out the
back of the chair.
The third is as a sacral support depending upon how far
or tight the flap is pulled under the seat cushion.
Removing Non-Adjustable Tension Back
Upholstery
1. Cut cable tie that secures back upholstery to tab on
axle mounting place.
2. Remove lock nut and button head cap screws that
secure cane handles to frame tube.
3. Remove cane handles from frame tube.
4. Remove phillips head screws that secure upholstery
to cane handles.
5. Remove upholstery from cane tubes.
Installing Adjustable Back Upholstery
1. Slide one (1) cane handle into each section (anchor
loop/adjuster strap) of the adjustable back upholstery
with grommet hole facing the rear of the chair.
2. Secure adjustable back upholstery to cane handles
with mounting screws.
3. Set each cane in frame tube at desired height.
4. Thread screw from the outside of the frame tube through
cane handle and securely tighten with locknut.
NOTE: Clean upholstery with warm water and mild detergent to remove superficial soil.
5. Slip adjuster straps through corresponding anchor
loop and adjust back upholstery. Secure with hook
and loop fasteners.
1
WARNINGS
After the adjustable back upholstery has been
positioned to the end user’s individual needs, the
hook and loop fasteners MUST be securely fastened before applying the back upholstery
cover. The adjustable back should be checked
whenever entering the chair to ensure that the
hook and loop fasteners are securely fastened.
6. Attach back upholster cover (hook and loop fasteners) to the back of the adjustable back upholstery
(hook and Loop fasteners).
NOTE: Hook and loop fasteners on the back upholstery
cover and adjustable back MUST line-up.
7. Flip the back upholstery cover over adjustable back
upholstery and secure (hook and loop fasteners) to
the front of the adjustable back upholstery.
8. Lay front portion of back upholstery cover on seat
with existing cushion removed.
9. Adjust slack of back upholstery cover before replacing existing cushion.
Back Upholstery
Cane Handle
WHY USE ADJUSTABLE TENSION
UPHOLSTERY: A CLINICAL
DISCUSSION
The flexible sling upholstery commonly used on wheelchairs allows the wheelchair to fold without removing rigid
components. Sling upholstery will stretch with use. Unfortunately, stretched upholstery does not support the back
well. Stretched upholstery often allows the pelvis to drift
into posterior tilt while the back assumes a kyphotic posture.
With the adjustable tension backrest, the sag can be taken
out of the sling restoring the original tightness. Adjustable
tension upholstery can also provide significant improvements to the seated posture and function of the wheelchair. By changing the tension of the strap, the backrest
can be adjusted to accommodate back postures such as
kyphosis, lordosis, stabilize the pelvis and back, and provide lateral stability.
In addition to restoring the sling to original tension, the
adjustable tension backrest can be adjusted to help maintain the pelvis and back position, which can improve posture, balance and function.
The wheelchair backrest should be able to follow the natural anatomical contours of the back. When viewing a person from the side, the thoracic portion of the back will
extend posteriorly to the pelvis and buttocks (FIGURE 2).
Phillips
Head
Screw
Locknut
Button Head
Cap Screw
Frame Back Tube
Hook and
Loop
Fasteners
Back Upholstery
Anchor Loops
Tab
Cable Tie
Axle
Mounting
Plate
Back Upholstery Cover
Hook and Loop
Fasteners
Frame
Grommet Hole
Back Upholstery
Adjuster Straps
FIGURE 2
FIGURE 1 - REPLACING EXISTING UPHOLSTERY
2
When using a non-adjustable flat backrest, the top portion of the upholstery will usually push the trunk forward
of the center of gravity over the pelvis. To maintain the
trunk in the upright posture, the user must have and use
the back extensor musculature, or add tilt or recline to
backrest (FIGURE 3).
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 (FIGURE 5).
10-15° Angle
P.S.I.S.
FIGURE 3
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 (FIGURE 4).
FIGURE 5
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 (FIGURE 6).
Adjust Backrest
to Conform to
Fixed Kyphotic
Deformity
Open Seat to Back
Angle If Possible
FIGURE 6
FIGURE 4
3
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