- Contact with Back Support
- Pressure Distribution
- Stability
- Line of Sight
| - Only the apex of the curvature is making contact with the seat surface
- Peak pressures are placed directly at the apex
- Increased pressure on a smaller diameter causes pain and places the resident at risk of skin breakdown at the peak pressures
- Residents shift and slide out of midline to alleviate pain and pressure
- Stability is lost due to poor contact with seat surface, increasing the risk of unwanted movement
- Line of sight is lost with the eye gaze pointing at the ground, ceiling, or to the left or right due to the inability to open or close the seat-to-back angle
| - The entire spine is making contact with the seat surface
- Even pressure distribution throughout the length of the spine decreases peak pressure and pain
- Residents feel stable and have less pain, making them less likely to shift into abnormal postures
- Maximizes stability as the entire trunk is supported
- Assists with pelvic stability when trunk stability is maximized
- Allows you to adjust seat-to-back angle to change the line of sight back to midline
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