A physical therapist is selecting a wheelchair cushion for a patient with T4 AIS A paraplegia who has a history of ischial pressure ulcers and requires maximum pressure relief. The patient has significant lower extremity spasticity causing frequent involuntary leg movements. Which cushion type presents the GREATEST concern regarding this patient's spasticity?

A physical therapist is selecting a wheelchair cushion for a patient with T4 AIS A paraplegia who has a history of ischial pressure ulcers and requires maximum pressure relief. The patient has significant lower extremity spasticity causing frequent involuntary leg movements. Which cushion type presents the GREATEST concern regarding this patient's spasticity?

• A. Contoured foam cushion
• B. Gel cushion with foam base
• C. Air-filled (ROHO) cushion
• D. Honeycomb cushion

Answer: (C)

Spasticity causes frequent, involuntary movements that continuously alter how pressure is distributed under the pelvis. A cushion must maintain consistent pressure relief and minimize shearing during these unpredictable shifts. An air-filled cushion relies on maintaining even air pressure across many cells; when the patient moves, air redistributes quickly, creating uneven pressures and potential hotspots or shear at the ischial area. This dynamic interface makes air-filled cushions particularly vulnerable to spastic movements and, in a patient with a history of ischial ulcers needing maximum pressure relief, poses the greatest concern. In contrast, contoured foam, gel with a foam base, and honeycomb cushions provide more stable, less movement-dependent interfaces, distributing load more consistently even with involuntary leg motions, and thus are less likely to amplify spasticity-related pressure changes.

Spasticity causes frequent, involuntary movements that continuously alter how pressure is distributed under the pelvis. A cushion must maintain consistent pressure relief and minimize shearing during these unpredictable shifts. An air-filled cushion relies on maintaining even air pressure across many cells; when the patient moves, air redistributes quickly, creating uneven pressures and potential hotspots or shear at the ischial area. This dynamic interface makes air-filled cushions particularly vulnerable to spastic movements and, in a patient with a history of ischial ulcers needing maximum pressure relief, poses the greatest concern.

In contrast, contoured foam, gel with a foam base, and honeycomb cushions provide more stable, less movement-dependent interfaces, distributing load more consistently even with involuntary leg motions, and thus are less likely to amplify spasticity-related pressure changes.