A physical therapist orders a power wheelchair with tilt-in-space feature for a patient with C5 AIS A SCI. During the tilt function, the entire seating system rotates posteriorly on the base. What is the PRIMARY medical justification for ordering this feature?

A physical therapist orders a power wheelchair with tilt-in-space feature for a patient with C5 AIS A SCI. During the tilt function, the entire seating system rotates posteriorly on the base. What is the PRIMARY medical justification for ordering this feature?

• A. To allow the patient to reach objects on high shelves
• B. To provide pressure redistribution from the ischial tuberosities to the posterior trunk for pressure relief
• C. To allow the patient to perform intermittent catheterization in the wheelchair
• D. To increase the speed of the wheelchair on inclines

Answer: (B)

Tilt-in-space is used to relieve sitting pressure by shifting the body's weight away from the ischial tuberosities and redistributing load to the back and posterior pelvic region. In a person with a C5 AIS A spinal cord injury, trunk control is limited and sensation is often impaired, making prolonged sitting a high risk for pressure ulcers at the sitting bones. By tilting the entire seating system posteriorly, the weight is moved onto the backrest and posterior pelvis, increasing the contact area and lowering peak pressure on the ischial tuberosities. This periodic pressure redistribution is the primary reason for ordering this feature. The other options don’t address pressure relief in seated position: reaching high shelves relies on arm and trunk control; catheterization in the wheelchair is a procedural need, not a primary wheelchair function; and increasing speed on inclines is not related to tilt capability.

Tilt-in-space is used to relieve sitting pressure by shifting the body's weight away from the ischial tuberosities and redistributing load to the back and posterior pelvic region. In a person with a C5 AIS A spinal cord injury, trunk control is limited and sensation is often impaired, making prolonged sitting a high risk for pressure ulcers at the sitting bones. By tilting the entire seating system posteriorly, the weight is moved onto the backrest and posterior pelvis, increasing the contact area and lowering peak pressure on the ischial tuberosities. This periodic pressure redistribution is the primary reason for ordering this feature. The other options don’t address pressure relief in seated position: reaching high shelves relies on arm and trunk control; catheterization in the wheelchair is a procedural need, not a primary wheelchair function; and increasing speed on inclines is not related to tilt capability.