Invacare A-4 User Manual page 21

Virtually all activities which involve movement in the wheelchair have an effect on the center of gravity. Invacare recommends using seat positioning
straps for additional safety while involved in activities that shift your weight.
DO NOT lean forward out of the wheelchair any further than stability will allow. Make sure casters are pointing in the forward position whenever
you lean forward. This can be achieved by advancing the wheelchair and then reversing it in a straight line.
WARNING
DO NOT attempt to reach objects if you have to move forward in the seat or pick them up from the floor by reaching
down between your knees.
The position of the footrest, camber tube, back angle, the tautness of the back upholstery as well as the user's condition are
directly related to the wheelchair's stability. Any change to one or any combination of the five may cause the wheelchair to
decrease in stability. Use EXTREME caution when using a new seating position. The addition of anti-tippers may be
required.
Many activities require the wheelchair owner to reach, bend and transfer in and out of the wheelchair. These movements will cause a change to the
normal balance, the center of gravity, and the weight distribution of the wheelchair.
To determine and establish your particular safety limits, practice bending, reaching and transferring activities in several combinations in the presence
of a qualified health-care professional before attempting active use of wheelchair.
Proper positioning is essential for your safety. When reaching, leaning, bending forward, it is important to use the front casters as a tool to maintain
stability and balance.
• Lengthening the wheelbase will increase the stability and maintain standard maneuverability of wheelchair.
• Shortening the wheelbase will decrease the stability, increase the maneuverability and distribute additional weight onto the rear wheels.
Part No 1110545
4 SAFETY/HANDLING OF THE WHEELCHAIR
21
Invacare® A-4® Wheelchair