A physical therapist is educating a patient with T4 ASIA A SCI about the importance of performing regular seated pressure reliefs. Which of the following BEST describes the primary rationale for this intervention?

A physical therapist is educating a patient with T4 ASIA A SCI about the importance of performing regular seated pressure reliefs. Which of the following BEST describes the primary rationale for this intervention?

• A. To prevent venous pooling in the lower extremities
• B. To improve respiratory function during wheelchair use
• C. To decrease lower extremity spasticity
• D. To allow adequate blood flow and tissue reperfusion to skin overlying the ischial tuberosities

Answer: (D)

Regular seated pressure reliefs protect skin and underlying tissues by restoring blood flow to areas under the seating surface. In a person with T4 ASIA A SCI, sensation and voluntary movement below the injury are impaired, so the buttocks and ischial tuberosities can’t detect or shift prolonged pressure. When pressure remains on these tissues, small blood vessels get compressed, perfusion drops, and the skin becomes at risk for ischemia and breakdown. Periodic reliefs relieve that pressure, allow reperfusion, and help deliver oxygen and nutrients to the skin while removing waste products, which together prevent pressure ulcers. The other options don’t directly address tissue viability under the seated surface: relieving venous pooling in the legs isn’t the main goal of seated pressure reliefs, improving respiratory function during wheelchair use isn’t the target, and decreasing spasticity isn’t achieved by changing seating pressure.

Regular seated pressure reliefs protect skin and underlying tissues by restoring blood flow to areas under the seating surface. In a person with T4 ASIA A SCI, sensation and voluntary movement below the injury are impaired, so the buttocks and ischial tuberosities can’t detect or shift prolonged pressure. When pressure remains on these tissues, small blood vessels get compressed, perfusion drops, and the skin becomes at risk for ischemia and breakdown. Periodic reliefs relieve that pressure, allow reperfusion, and help deliver oxygen and nutrients to the skin while removing waste products, which together prevent pressure ulcers. The other options don’t directly address tissue viability under the seated surface: relieving venous pooling in the legs isn’t the main goal of seated pressure reliefs, improving respiratory function during wheelchair use isn’t the target, and decreasing spasticity isn’t achieved by changing seating pressure.