Wheelchairs and Positioning Flashcards
Hands-free sitter
Patient can maintain seated position without use of hands, seating system emphasizes mobility, stability with base of support and comfort
Hands-dependent sitter
Patient uses one or more hands to maintain seated position, pelvis/trunk support required to enable free hands for functional activity
Propper sitter
Patient lacks ability to sit without support, total body support required for posture and repositioning
What body structure should be observed first for wheelchair positioning
Position of pelvis and trunk
If deformity exists seated in wheelchair what should you do
Apply manual pressure to determine if the deformity is flexible or inflexible
Pelvic obliquity
One side of pelvis is lower than other side which can lead to scoliotic posture and pressure ulcers on ischial tuberosity
Kyphosis
Pelvis rotates posteriorly
Sacral sitting
Flexion of lumbar spine
Clients slide forward in w/c
Scoliosis
Pelvis rotates to one side
Spine and trunk move in opposite direction
Lordosis
Pelvis rotates anteriorly
Increased curvature of lumbar spine
Patient use UE for support
Windswept deformity
Abduction and external rotation of one hip while the opposite hip is in adduction and internal rotation
Pelvis rotates laterally with thighs moving to opposite side
What hip ROM do you need for manual propulsion and sitting upright
90 degrees hip flexion
Reference seated position
Trunk upright in midline
Hip, knees, ankles 90 flexion
Pelvis natural
Head in mid-position
Arms at the side of trunk
Elbows flexion to 90
Prolonged sitting can result in
Pressure ulcers
Back pain
Joint contractures
LE edema
Postural deformity
What is the key to stability
Pelvic positioning
What provides the base of support for stability and movement when seated
Pelvis and thighs
Seat supports
Pelvis and thighs
Back supports
Posterior pelvis and spine
Pressure mapping
Use of pressure sensitive mat between client and seating surface to determine effectiveness of different cushions for relieving pressure on seating surface
Flat/planar cushion shape
- None to minimal postural support
- Patient can reposition themselves independently
- Do not accommodate body shape
Standard contoured cushion shape
- Contours based on body size
- More support than flat
- Distribute pressure across surface
- Less expensive than custom-contoured
Custom-contoured cushion shape
- Shaped to client body
- Provide most support
- Distribute pressure across surface
- More expensive
- Patients limited to one position
- Transfers are more difficulty to perform
- System not adaptable (child growth)
- For patients who need support to maintain balance, have spinal or pelvis deformities, have muscle tone abnormalities or need additional lumbar support
Foam cushion
- Variable density
- Lightweight
- Low in cost
- Heat and moisture can build up
- Custom-contoured foam is more expensive and provides better postural control, shearing, and weight shifting
Gel filled cushion
- Conform to shape of buttocks
- Heavy
- Adequate for postural control
- Sensitive to temperature
Air filled cushion
- Lightweight
- Provide even pressure relief when properly inflated
- Reduce postural stability
Honeycomb-shape plastic cushion
- Uneven pressure relief
- Lightweight
Hybrid cushion
- Combination of materials
- Usually gel and foam
Alternating pressure cushion
- Provide scheduled pressure relief through alternating levels of inflation and delation
- Decrease postural stability
Pelvic stabilizer (SubASIS bar)
Positioned at front of pelvis to limit pelvis mobility (tilt, rotation, obliquity)
Thoracic supports
Places laterally to trunk and below armpit to facilitate trunk stability and prevent scoliosis
Thigh supports
Placed laterally or medially to thighs to control AB/AD for windswept deformity
Head rest positioing
Back to head on occiput
Seat width measurement
Widest part of hips/thighs plus 1-2 inches to leave room between thighs and chair for repositioning/transfers, to avoid rubbing/pressure and accommodate bulky clothing
Seat depth measurement
Measure base of back to popliteal space of knee minus 1-2 inches to ensure seat edge does not reach back of knee and restrict movement/circulation
Seat-back measurement
Measure from seat surface with cushion to top of shoulders
Seat height measurement
Measure popliteal space to bottom of clients heel with footrests having 2-inch clearance from floor to keep thighs parallel to flow and feet resting comfortability on footrests
If minimal trunk support is required
Can measure seat-back height to mid-back under the scapulae
If max trunk support is requried
Hight seat-back height may be needed
If seat-back hight is too
Contact with push rim will be limited
Sport chairs
Have lower seat-back height which increases functional mobility and decreases stability
Seat angle
Sloping of sat to the rear of wheelchair to help stabilize pelvis
Too much sloping of seat angle can
Make transfers more difficulty
Cause pressure