A nurse is caring for a client who is immobilized. Which of the following interventions is appropriate to prevent contracture?

The correct answer is D: Apply an orthotic to the client's foot. Contractures are a common complication in immobilized clients, where muscles and tendons shorten and tighten due to lack of movement. Applying an orthotic to the foot helps maintain proper alignment and prevents the foot from being in a fixed position, thus reducing the risk of contractures. Positioning a pillow under the client's knees (A) may help with comfort but does not directly prevent contractures. Placing a towel roll under the client's neck (B) is unrelated to preventing contractures in the lower extremities. Aligning a trochanter wedge between the client's legs (C) is more for hip alignment and may not directly prevent contractures in the foot.