Which back height is used when the user requires some spinal support or uses a power mobility device?

• A. Back height below inferior angle of scapula
• B. Removable back insert
• C. Planar seat
• D. Back height above inferior angle of scapula

Answer: (D)

Maximizing trunk support is the key idea. When a user needs some spinal support or uses a power mobility device, the back should extend high enough to support the mid-to-upper thoracic spine, typically reaching above the inferior angle of the scapula. This placement helps maintain an upright posture, stabilizes the scapulae, reduces forward slumping, and improves control during propulsion or device operation. A back height below the inferior angle offers only minimal trunk support, and a removable back insert or a planar seat address other aspects of fit but not the specific height needed for spinal support. Therefore, the back height above the inferior angle of the scapula is the best choice.